RadioLib
Universal wireless communication library for Arduino
SX127x Class Referenceabstract

Base class for SX127x series. All derived classes for SX127x (e.g. SX1278 or SX1272) inherit from this base class. This class should not be instantiated directly from Arduino sketch, only from its derived classes. More...

#include <SX127x.h>

Inheritance diagram for SX127x:
PhysicalLayer SX1272 SX1278 SX1273 SX1276 SX1277 SX1279

Public Member Functions

 SX127x (Module *mod)
 Default constructor. Called internally when creating new LoRa instance. More...
 
int16_t begin (uint8_t *chipVersions, uint8_t numVersions, uint8_t syncWord, uint16_t preambleLength)
 Initialization method. Will be called with appropriate parameters when calling initialization method from derived class. More...
 
virtual void reset ()=0
 Reset method. Will reset the chip to the default state using RST pin. Declared pure virtual since SX1272 and SX1278 implementations differ.
 
int16_t beginFSK (uint8_t *chipVersions, uint8_t numVersions, float freqDev, float rxBw, uint16_t preambleLength, bool enableOOK)
 Initialization method for FSK modem. Will be called with appropriate parameters when calling FSK initialization method from derived class. More...
 
int16_t transmit (const uint8_t *data, size_t len, uint8_t addr=0) override
 Binary transmit method. Will transmit arbitrary binary data up to 255 bytes long using LoRa or up to 63 bytes using FSK modem. For overloads to transmit Arduino String or C-string, see PhysicalLayer::transmit. More...
 
int16_t receive (uint8_t *data, size_t len) override
 Binary receive method. Will attempt to receive arbitrary binary data up to 255 bytes long using LoRa or up to 63 bytes using FSK modem. For overloads to receive Arduino String, see PhysicalLayer::receive. More...
 
int16_t scanChannel () override
 Performs scan for valid LoRa preamble in the current channel. More...
 
int16_t sleep () override
 Sets the LoRa module to sleep to save power. Module will not be able to transmit or receive any data while in sleep mode. Module will wake up automatically when methods like transmit or receive are called. More...
 
int16_t standby () override
 Sets the LoRa module to standby. More...
 
int16_t standby (uint8_t mode) override
 Sets the LoRa module to standby. More...
 
int16_t transmitDirect (uint32_t frf=0) override
 Enables direct transmission mode on pins DIO1 (clock) and DIO2 (data). While in direct mode, the module will not be able to transmit or receive packets. Can only be activated in FSK mode. More...
 
int16_t receiveDirect () override
 Enables direct reception mode on pins DIO1 (clock) and DIO2 (data). While in direct mode, the module will not be able to transmit or receive packets. Can only be activated in FSK mode. More...
 
int16_t packetMode ()
 Disables direct mode and enables packet mode, allowing the module to receive packets. Can only be activated in FSK mode. More...
 
void setDio0Action (void(*func)(void), uint32_t dir)
 Set interrupt service routine function to call when DIO0 activates. More...
 
void clearDio0Action ()
 Clears interrupt service routine to call when DIO0 activates.
 
void setDio1Action (void(*func)(void), uint32_t dir)
 Set interrupt service routine function to call when DIO1 activates. More...
 
void clearDio1Action ()
 Clears interrupt service routine to call when DIO1 activates.
 
void setPacketReceivedAction (void(*func)(void)) override
 Sets interrupt service routine to call when a packet is received. More...
 
void clearPacketReceivedAction () override
 Clears interrupt service routine to call when a packet is received.
 
void setPacketSentAction (void(*func)(void)) override
 Sets interrupt service routine to call when a packet is sent. More...
 
void clearPacketSentAction () override
 Clears interrupt service routine to call when a packet is sent.
 
void setChannelScanAction (void(*func)(void)) override
 Sets interrupt service routine to call when a channel scan is finished. More...
 
void clearChannelScanAction () override
 Clears interrupt service routine to call when a channel scan is finished.
 
void setFifoEmptyAction (void(*func)(void))
 Set interrupt service routine function to call when FIFO is empty. More...
 
void clearFifoEmptyAction ()
 Clears interrupt service routine to call when FIFO is empty.
 
void setFifoThreshold (uint8_t threshold)
 Set FIFO threshold level. Be aware that threshold is also set in setFifoFullAction method. setFifoThreshold method must be called AFTER calling setFifoFullAction! More...
 
void setFifoFullAction (void(*func)(void))
 Set interrupt service routine function to call when FIFO is full. More...
 
void clearFifoFullAction ()
 Clears interrupt service routine to call when FIFO is full.
 
bool fifoAdd (uint8_t *data, int totalLen, int *remLen)
 Set interrupt service routine function to call when FIFO is empty. More...
 
bool fifoGet (volatile uint8_t *data, int totalLen, volatile int *rcvLen)
 Set interrupt service routine function to call when FIFO is sufficiently full to read. More...
 
int16_t startTransmit (const uint8_t *data, size_t len, uint8_t addr=0) override
 Interrupt-driven binary transmit method. Will start transmitting arbitrary binary data up to 255 bytes long using LoRa or up to 63 bytes using FSK modem. More...
 
int16_t finishTransmit () override
 Clean up after transmission is done. More...
 
int16_t startReceive () override
 Interrupt-driven receive method with default parameters. Implemented for compatibility with PhysicalLayer. More...
 
int16_t startReceive (uint32_t timeout, RadioLibIrqFlags_t irqFlags=RADIOLIB_IRQ_RX_DEFAULT_FLAGS, RadioLibIrqFlags_t irqMask=RADIOLIB_IRQ_RX_DEFAULT_MASK, size_t len=0) override
 Interrupt-driven receive method, implemented for compatibility with PhysicalLayer. More...
 
int16_t readData (uint8_t *data, size_t len) override
 Reads data that was received after calling startReceive method. When the packet length is not known in advance, getPacketLength method must be called BEFORE calling readData! More...
 
int16_t startChannelScan () override
 Interrupt-driven channel activity detection method. DIO0 will be activated when LoRa preamble is detected. DIO1 will be activated if there's no preamble detected before timeout. More...
 
int16_t getChannelScanResult () override
 Read the channel scan result. More...
 
int16_t setSyncWord (uint8_t syncWord)
 Sets LoRa sync word. Only available in LoRa mode. More...
 
int16_t setCurrentLimit (uint8_t currentLimit)
 Sets current limit for over current protection at transmitter amplifier. Allowed values range from 45 to 120 mA in 5 mA steps and 120 to 240 mA in 10 mA steps. More...
 
int16_t setPreambleLength (size_t preambleLength) override
 Sets LoRa or FSK preamble length. Allowed values range from 6 to 65535 in LoRa mode or 0 to 65535 in FSK mode. More...
 
int16_t invertPreamble (bool enable)
 Invert FSK preamble polarity. The default (non-inverted) is 0x55, the inverted is 0xAA. More...
 
float getFrequencyError (bool autoCorrect=false)
 Gets frequency error of the latest received packet. More...
 
float getAFCError ()
 Gets current AFC error. More...
 
float getSNR () override
 Gets signal-to-noise ratio of the latest received packet. Only available in LoRa mode. More...
 
float getDataRate () const
 Get data rate of the latest transmitted packet. More...
 
int16_t setFrequencyDeviation (float freqDev) override
 Sets FSK frequency deviation from carrier frequency. Allowed values depend on bit rate setting and must be lower than 200 kHz. Only available in FSK mode. More...
 
int16_t setRxBandwidth (float rxBw)
 Sets FSK receiver bandwidth. Allowed values range from 2.6 to 250 kHz. Only available in FSK mode. More...
 
int16_t setAFCBandwidth (float afcBw)
 Sets FSK automatic frequency correction bandwidth. Allowed values range from 2.6 to 250 kHz. Only available in FSK mode. More...
 
int16_t setAFC (bool isEnabled)
 Enables or disables FSK automatic frequency correction(AFC) More...
 
int16_t setAFCAGCTrigger (uint8_t trigger)
 Controls trigger of AFC and AGC. More...
 
int16_t setSyncWord (uint8_t *syncWord, size_t len) override
 Sets FSK sync word. Allowed sync words are up to 8 bytes long and can not contain null bytes. Only available in FSK mode. More...
 
int16_t setNodeAddress (uint8_t nodeAddr)
 Sets FSK node address. Calling this method will enable address filtering. Only available in FSK mode. More...
 
int16_t setBroadcastAddress (uint8_t broadAddr)
 Sets FSK broadcast address. Calling this method will enable address filtering. Only available in FSK mode. More...
 
int16_t disableAddressFiltering ()
 Disables FSK address filtering. More...
 
int16_t setOOK (bool enableOOK)
 Enables/disables OOK modulation instead of FSK. More...
 
int16_t setOokThresholdType (uint8_t type)
 Selects the type of threshold in the OOK data slicer. More...
 
int16_t setOokPeakThresholdDecrement (uint8_t value)
 Period of decrement of the RSSI threshold in the OOK demodulator. More...
 
int16_t setOokFixedOrFloorThreshold (uint8_t value)
 Fixed threshold for the Data Slicer in OOK mode or floor threshold for the Data Slicer in OOK when Peak mode is used. More...
 
int16_t setOokPeakThresholdStep (uint8_t value)
 Size of each decrement of the RSSI threshold in the OOK demodulator. More...
 
int16_t enableBitSync ()
 Enable Bit synchronizer. More...
 
int16_t disableBitSync ()
 Disable Bit synchronizer (not allowed in Packet mode). More...
 
size_t getPacketLength (bool update=true) override
 Query modem for the packet length of received payload. More...
 
int16_t fixedPacketLengthMode (uint8_t len=RADIOLIB_SX127X_MAX_PACKET_LENGTH_FSK)
 Set modem in fixed packet length mode. Available in FSK mode only. More...
 
int16_t variablePacketLengthMode (uint8_t maxLen=RADIOLIB_SX127X_MAX_PACKET_LENGTH_FSK)
 Set modem in variable packet length mode. Available in FSK mode only. More...
 
float getNumSymbols (size_t len)
 Convert from bytes to LoRa symbols. More...
 
RadioLibTime_t getTimeOnAir (size_t len) override
 Get expected time-on-air for a given size of payload. More...
 
RadioLibTime_t calculateRxTimeout (RadioLibTime_t timeoutUs) override
 Calculate the timeout value for this specific module / series (in number of symbols or units of time) More...
 
uint32_t getIrqFlags () override
 Read currently active IRQ flags. More...
 
int16_t setIrqFlags (uint32_t irq) override
 Set interrupt on DIO1 to be sent on a specific IRQ bit (e.g. RxTimeout, CadDone). NOTE: Unlike other modules that support IRQ abstraction (SX126x, LR11x0, etc.), SX127x cannot configure multiple IRQs to signal using the same DIOx pin. This method tries to configure IRQs in a "best effort" approach, and will skip conflicting flags. RADIOLIB_ERR_INVALID_IRQ will be returned in this case. More...
 
int16_t clearIrqFlags (uint32_t irq) override
 Clear interrupt on a specific IRQ bit (e.g. RxTimeout, CadDone). More...
 
int16_t setCrcFiltering (bool enable=true)
 Enable CRC filtering and generation. More...
 
int16_t setRSSIConfig (uint8_t smoothingSamples, int8_t offset=0)
 Sets RSSI measurement configuration in FSK mode. More...
 
int16_t setEncoding (uint8_t encoding) override
 Sets transmission encoding. Only available in FSK mode. Allowed values are RADIOLIB_ENCODING_NRZ, RADIOLIB_ENCODING_MANCHESTER and RADIOLIB_ENCODING_WHITENING. More...
 
uint16_t getIRQFlags ()
 Reads currently active IRQ flags, can be used to check which event caused an interrupt. In LoRa mode, this is the content of SX127X_REG_IRQ_FLAGS register. In FSK mode, this is the contents of SX127X_REG_IRQ_FLAGS_2 (MSB) and SX127X_REG_IRQ_FLAGS_1 (LSB) registers. More...
 
uint8_t getModemStatus ()
 Reads modem status. Only available in LoRa mode. More...
 
int8_t getTempRaw ()
 Reads uncalibrated temperature value. This function will change operating mode and should not be called during Tx, Rx or CAD. More...
 
void setRfSwitchPins (uint32_t rxEn, uint32_t txEn)
 Some modules contain external RF switch controlled by pins. This function gives RadioLib control over those pins to automatically switch between various modes: When idle both pins will be LOW, during TX the txEn pin will be HIGH, during RX the rxPin will be HIGH. More...
 
void setRfSwitchTable (const uint32_t(&pins)[Module::RFSWITCH_MAX_PINS], const Module::RfSwitchMode_t table[])
 Some modules contain external RF switch controlled by pins. This function gives RadioLib control over those pins to automatically switch between various modes. More...
 
uint8_t randomByte () override
 Get one truly random byte from RSSI noise. More...
 
int16_t getChipVersion ()
 Read version SPI register. Should return SX1278_CHIP_VERSION (0x12) or SX1272_CHIP_VERSION (0x22) if SX127x is connected and working. More...
 
int16_t invertIQ (bool enable) override
 Enable/disable inversion of the I and Q signals. More...
 
int16_t getModem (ModemType_t *modem) override
 Get modem currently in use by the radio. More...
 
void setDirectAction (void(*func)(void)) override
 Set interrupt service routine function to call when data bit is received in direct mode. More...
 
void readBit (uint32_t pin) override
 Function to read and process data bit in direct reception mode. More...
 
int16_t setFHSSHoppingPeriod (uint8_t freqHoppingPeriod)
 Sets the hopping period and enables FHSS. More...
 
uint8_t getFHSSHoppingPeriod (void)
 Gets FHSS hopping period. More...
 
uint8_t getFHSSChannel (void)
 Gets the FHSS channel in use. More...
 
void clearFHSSInt (void)
 Clear the FHSS interrupt.
 
int16_t setDIOMapping (uint32_t pin, uint32_t value) override
 Configure DIO pin mapping to get a given signal on a DIO pin (if available). More...
 
int16_t setDIOPreambleDetect (bool usePreambleDetect)
 Configure DIO mapping to use RSSI or Preamble Detect for pins that support it. More...
 
int16_t setRSSIThreshold (float dbm)
 Sets the RSSI value above which the RSSI interrupt is signaled. More...
 
int16_t setLowBatteryThreshold (int8_t level, uint32_t pin=RADIOLIB_NC)
 Set low battery indicator threshold. More...
 
int16_t transmit (const char *str, uint8_t addr=0)
 C-string transmit method. More...
 
virtual int16_t transmit (const uint8_t *data, size_t len, uint8_t addr=0)
 Binary transmit method. Must be implemented in module class. More...
 
virtual int16_t receive (uint8_t *data, size_t len)
 Binary receive method. Must be implemented in module class. More...
 
int16_t startTransmit (const char *str, uint8_t addr=0)
 Interrupt-driven Arduino String transmit method. Unlike the standard transmit method, this one is non-blocking. Interrupt pin will be activated when transmission finishes. More...
 
virtual int16_t startTransmit (const uint8_t *data, size_t len, uint8_t addr=0)
 Interrupt-driven binary transmit method. More...
 
virtual int16_t readData (uint8_t *data, size_t len)
 Reads data that was received after calling startReceive method. More...
 
- Public Member Functions inherited from PhysicalLayer
 PhysicalLayer (float step, size_t maxLen)
 Default constructor. More...
 
int16_t transmit (const char *str, uint8_t addr=0)
 C-string transmit method. More...
 
int16_t startTransmit (const char *str, uint8_t addr=0)
 Interrupt-driven Arduino String transmit method. Unlike the standard transmit method, this one is non-blocking. Interrupt pin will be activated when transmission finishes. More...
 
virtual int16_t setFrequency (float freq)
 Sets carrier frequency. Must be implemented in module class. More...
 
virtual int16_t setBitRate (float br)
 Sets FSK bit rate. Only available in FSK mode. Must be implemented in module class. More...
 
virtual int16_t setDataShaping (uint8_t sh)
 Sets GFSK data shaping. Only available in FSK mode. Must be implemented in module class. More...
 
virtual int16_t setOutputPower (int8_t power)
 Set output power. Must be implemented in module class if the module supports it. More...
 
virtual int16_t checkOutputPower (int8_t power, int8_t *clipped)
 Check if output power is configurable. Must be implemented in module class if the module supports it. More...
 
virtual int16_t setDataRate (DataRate_t dr)
 Set data. Must be implemented in module class if the module supports it. More...
 
virtual int16_t checkDataRate (DataRate_t dr)
 Check the data rate can be configured by this module. Must be implemented in module class if the module supports it. More...
 
float getFreqStep () const
 Gets the module frequency step size that was set in constructor. More...
 
virtual float getRSSI ()
 Gets RSSI (Recorded Signal Strength Indicator) of the last received packet. More...
 
uint32_t getIrqMapped (RadioLibIrqFlags_t irq)
 Convert from radio-agnostic IRQ flags to radio-specific flags. More...
 
int16_t checkIrq (RadioLibIrqType_t irq)
 Check whether a specific IRQ bit is set (e.g. RxTimeout, CadDone). More...
 
int16_t setIrq (RadioLibIrqFlags_t irq)
 Set interrupt on specific IRQ bit(s) (e.g. RxTimeout, CadDone). Keep in mind that not all radio modules support all RADIOLIB_IRQ_ flags! More...
 
int16_t clearIrq (RadioLibIrqFlags_t irq)
 Clear interrupt on a specific IRQ bit (e.g. RxTimeout, CadDone). Keep in mind that not all radio modules support all RADIOLIB_IRQ_ flags! More...
 
virtual int16_t startChannelScan (const ChannelScanConfig_t &config)
 Interrupt-driven channel activity detection method. interrupt will be activated when packet is detected. Must be implemented in module class. More...
 
virtual int16_t scanChannel (const ChannelScanConfig_t &config)
 Check whether the current communication channel is free or occupied. Performs CAD for LoRa modules, or RSSI measurement for FSK modules. More...
 
int32_t random (int32_t max)
 Get truly random number in range 0 - max. More...
 
int32_t random (int32_t min, int32_t max)
 Get truly random number in range min - max. More...
 
int16_t startDirect ()
 Configure module parameters for direct modes. Must be called prior to "ham" modes like RTTY or AX.25. Only available in FSK mode. More...
 
int16_t setDirectSyncWord (uint32_t syncWord, uint8_t len)
 Set sync word to be used to determine start of packet in direct reception mode. More...
 
int16_t available ()
 Get the number of direct mode bytes currently available in buffer. More...
 
void dropSync ()
 Forcefully drop synchronization.
 
uint8_t read (bool drop=true)
 Get data from direct mode buffer. More...
 
virtual int16_t setModem (ModemType_t modem)
 Set modem for the radio to use. Will perform full reset and reconfigure the radio using its default parameters. More...
 

Detailed Description

Base class for SX127x series. All derived classes for SX127x (e.g. SX1278 or SX1272) inherit from this base class. This class should not be instantiated directly from Arduino sketch, only from its derived classes.

Constructor & Destructor Documentation

◆ SX127x()

SX127x::SX127x ( Module mod)
explicit

Default constructor. Called internally when creating new LoRa instance.

Parameters
modInstance of Module that will be used to communicate with the LoRa chip.

Member Function Documentation

◆ begin()

int16_t SX127x::begin ( uint8_t *  chipVersions,
uint8_t  numVersions,
uint8_t  syncWord,
uint16_t  preambleLength 
)

Initialization method. Will be called with appropriate parameters when calling initialization method from derived class.

Parameters
chipVersionsArray of possible values in SPI version register. Used to verify the connection and hardware version.
numVersionsNumber of possible chip versions.
syncWordLoRa sync word.
preambleLengthLength of LoRa transmission preamble in symbols.
Returns
Status Codes

◆ beginFSK()

int16_t SX127x::beginFSK ( uint8_t *  chipVersions,
uint8_t  numVersions,
float  freqDev,
float  rxBw,
uint16_t  preambleLength,
bool  enableOOK 
)

Initialization method for FSK modem. Will be called with appropriate parameters when calling FSK initialization method from derived class.

Parameters
chipVersionsArray of possible values in SPI version register. Used to verify the connection and hardware version.
numVersionsNumber of possible chip versions.
freqDevFrequency deviation of the FSK transmission in kHz.
rxBwReceiver bandwidth in kHz.
preambleLengthLength of FSK preamble in bits.
enableOOKFlag to specify OOK mode. This modulation is similar to FSK.
Returns
Status Codes

◆ calculateRxTimeout()

RadioLibTime_t SX127x::calculateRxTimeout ( RadioLibTime_t  timeoutUs)
overridevirtual

Calculate the timeout value for this specific module / series (in number of symbols or units of time)

Parameters
timeoutUsTimeout in microseconds to listen for
Returns
Timeout value in a unit that is specific for the used module

Reimplemented from PhysicalLayer.

◆ clearIrqFlags()

int16_t SX127x::clearIrqFlags ( uint32_t  irq)
overridevirtual

Clear interrupt on a specific IRQ bit (e.g. RxTimeout, CadDone).

Parameters
irqModule-specific IRQ flags.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ disableAddressFiltering()

int16_t SX127x::disableAddressFiltering ( )

Disables FSK address filtering.

Returns
Status Codes

◆ disableBitSync()

int16_t SX127x::disableBitSync ( )

Disable Bit synchronizer (not allowed in Packet mode).

Returns
Status Codes

◆ enableBitSync()

int16_t SX127x::enableBitSync ( )

Enable Bit synchronizer.

Returns
Status Codes

◆ fifoAdd()

bool SX127x::fifoAdd ( uint8_t *  data,
int  totalLen,
int *  remLen 
)

Set interrupt service routine function to call when FIFO is empty.

Parameters
dataPointer to the transmission buffer.
totalLenTotal number of bytes to transmit.
remLenPointer to a counter holding the number of bytes that have been transmitted so far.
Returns
True when a complete packet is sent, false if more data is needed.

◆ fifoGet()

bool SX127x::fifoGet ( volatile uint8_t *  data,
int  totalLen,
volatile int *  rcvLen 
)

Set interrupt service routine function to call when FIFO is sufficiently full to read.

Parameters
dataPointer to a buffer that stores the receive data.
totalLenTotal number of bytes to receive.
rcvLenPointer to a counter holding the number of bytes that have been received so far.
Returns
True when a complete packet is received, false if more data is needed.

◆ finishTransmit()

int16_t SX127x::finishTransmit ( )
overridevirtual

Clean up after transmission is done.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ fixedPacketLengthMode()

int16_t SX127x::fixedPacketLengthMode ( uint8_t  len = RADIOLIB_SX127X_MAX_PACKET_LENGTH_FSK)

Set modem in fixed packet length mode. Available in FSK mode only.

Parameters
lenPacket length.
Returns
Status Codes

◆ getAFCError()

float SX127x::getAFCError ( )

Gets current AFC error.

Returns
Frequency offset from RF in Hz if AFC is enabled and triggered, zero otherwise.

◆ getChannelScanResult()

int16_t SX127x::getChannelScanResult ( )
overridevirtual

Read the channel scan result.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ getChipVersion()

int16_t SX127x::getChipVersion ( )

Read version SPI register. Should return SX1278_CHIP_VERSION (0x12) or SX1272_CHIP_VERSION (0x22) if SX127x is connected and working.

Returns
Version register contents or Status Codes

◆ getDataRate()

float SX127x::getDataRate ( ) const

Get data rate of the latest transmitted packet.

Returns
Last packet data rate in bps (bits per second).

◆ getFHSSChannel()

uint8_t SX127x::getFHSSChannel ( void  )

Gets the FHSS channel in use.

Returns
6 bit channel number

◆ getFHSSHoppingPeriod()

uint8_t SX127x::getFHSSHoppingPeriod ( void  )

Gets FHSS hopping period.

Returns
8 bit period

◆ getFrequencyError()

float SX127x::getFrequencyError ( bool  autoCorrect = false)

Gets frequency error of the latest received packet.

Parameters
autoCorrectWhen set to true, frequency will be automatically corrected.
Returns
Frequency error in Hz.

◆ getIRQFlags()

uint16_t SX127x::getIRQFlags ( )

Reads currently active IRQ flags, can be used to check which event caused an interrupt. In LoRa mode, this is the content of SX127X_REG_IRQ_FLAGS register. In FSK mode, this is the contents of SX127X_REG_IRQ_FLAGS_2 (MSB) and SX127X_REG_IRQ_FLAGS_1 (LSB) registers.

Returns
IRQ flags.

◆ getIrqFlags()

uint32_t SX127x::getIrqFlags ( )
overridevirtual

Read currently active IRQ flags.

Returns
IRQ flags.

Reimplemented from PhysicalLayer.

◆ getModem()

int16_t SX127x::getModem ( ModemType_t *  modem)
overridevirtual

Get modem currently in use by the radio.

Parameters
modemPointer to a variable to save the retrieved configuration into.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ getModemStatus()

uint8_t SX127x::getModemStatus ( )

Reads modem status. Only available in LoRa mode.

Returns
Modem status.

◆ getNumSymbols()

float SX127x::getNumSymbols ( size_t  len)

Convert from bytes to LoRa symbols.

Parameters
lenPayload length in bytes.
Returns
The total number of LoRa symbols, including preamble, sync and possible header.

◆ getPacketLength()

size_t SX127x::getPacketLength ( bool  update = true)
overridevirtual

Query modem for the packet length of received payload.

Parameters
updateUpdate received packet length. Will return cached value when set to false.
Returns
Length of last received packet in bytes.

Reimplemented from PhysicalLayer.

◆ getSNR()

float SX127x::getSNR ( )
overridevirtual

Gets signal-to-noise ratio of the latest received packet. Only available in LoRa mode.

Returns
Last packet signal-to-noise ratio (SNR).

Reimplemented from PhysicalLayer.

◆ getTempRaw()

int8_t SX127x::getTempRaw ( )

Reads uncalibrated temperature value. This function will change operating mode and should not be called during Tx, Rx or CAD.

Returns
Uncalibrated temperature sensor reading.

◆ getTimeOnAir()

RadioLibTime_t SX127x::getTimeOnAir ( size_t  len)
overridevirtual

Get expected time-on-air for a given size of payload.

Parameters
lenPayload length in bytes.
Returns
Expected time-on-air in microseconds.

Reimplemented from PhysicalLayer.

◆ invertIQ()

int16_t SX127x::invertIQ ( bool  enable)
overridevirtual

Enable/disable inversion of the I and Q signals.

Parameters
enableQI inversion enabled (true) or disabled (false);
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ invertPreamble()

int16_t SX127x::invertPreamble ( bool  enable)

Invert FSK preamble polarity. The default (non-inverted) is 0x55, the inverted is 0xAA.

Parameters
enablePreamble polarity in FSK mode - 0xAA when true, 0x55 when false.
Returns
Status Codes

◆ packetMode()

int16_t SX127x::packetMode ( )

Disables direct mode and enables packet mode, allowing the module to receive packets. Can only be activated in FSK mode.

Returns
Status Codes

◆ randomByte()

uint8_t SX127x::randomByte ( )
overridevirtual

Get one truly random byte from RSSI noise.

Returns
TRNG byte.

Reimplemented from PhysicalLayer.

◆ readBit()

void SX127x::readBit ( uint32_t  pin)
overridevirtual

Function to read and process data bit in direct reception mode.

Parameters
pinPin on which to read.

Reimplemented from PhysicalLayer.

◆ readData() [1/2]

int16_t PhysicalLayer::readData

Reads data that was received after calling startReceive method.

Parameters
dataPointer to array to save the received binary data.
lenNumber of bytes that will be read. When set to 0, the packet length will be retrieved automatically. When more bytes than received are requested, only the number of bytes requested will be returned.
Returns
Status Codes

◆ readData() [2/2]

int16_t SX127x::readData ( uint8_t *  data,
size_t  len 
)
overridevirtual

Reads data that was received after calling startReceive method. When the packet length is not known in advance, getPacketLength method must be called BEFORE calling readData!

Parameters
dataPointer to array to save the received binary data.
lenNumber of bytes that will be read. When set to 0, the packet length will be retrieved automatically. When more bytes than received are requested, only the number of bytes requested will be returned.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ receive() [1/2]

int16_t PhysicalLayer::receive

Binary receive method. Must be implemented in module class.

Parameters
dataPointer to array to save the received binary data.
lenPacket length, needed for some modules under special circumstances (e.g. LoRa implicit header mode).
Returns
Status Codes

◆ receive() [2/2]

int16_t SX127x::receive ( uint8_t *  data,
size_t  len 
)
overridevirtual

Binary receive method. Will attempt to receive arbitrary binary data up to 255 bytes long using LoRa or up to 63 bytes using FSK modem. For overloads to receive Arduino String, see PhysicalLayer::receive.

Parameters
dataPointer to array to save the received binary data.
lenNumber of bytes that will be received. Must be known in advance for binary transmissions.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ receiveDirect()

int16_t SX127x::receiveDirect ( )
overridevirtual

Enables direct reception mode on pins DIO1 (clock) and DIO2 (data). While in direct mode, the module will not be able to transmit or receive packets. Can only be activated in FSK mode.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ scanChannel()

int16_t SX127x::scanChannel ( )
overridevirtual

Performs scan for valid LoRa preamble in the current channel.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ setAFC()

int16_t SX127x::setAFC ( bool  isEnabled)

Enables or disables FSK automatic frequency correction(AFC)

Parameters
isEnabledAFC enabled or disabled
Returns
Status Codes

◆ setAFCAGCTrigger()

int16_t SX127x::setAFCAGCTrigger ( uint8_t  trigger)

Controls trigger of AFC and AGC.

Parameters
triggerone from SX127X_RX_TRIGGER_NONE, SX127X_RX_TRIGGER_RSSI_INTERRUPT, SX127X_RX_TRIGGER_PREAMBLE_DETECT, SX127X_RX_TRIGGER_BOTH
Returns
Status Codes

◆ setAFCBandwidth()

int16_t SX127x::setAFCBandwidth ( float  afcBw)

Sets FSK automatic frequency correction bandwidth. Allowed values range from 2.6 to 250 kHz. Only available in FSK mode.

Parameters
afcBwReceiver AFC bandwidth to be set (in kHz).
Returns
Status Codes

◆ setBroadcastAddress()

int16_t SX127x::setBroadcastAddress ( uint8_t  broadAddr)

Sets FSK broadcast address. Calling this method will enable address filtering. Only available in FSK mode.

Parameters
broadAddrBroadcast address to be set.
Returns
Status Codes

◆ setChannelScanAction()

void SX127x::setChannelScanAction ( void(*)(void)  func)
overridevirtual

Sets interrupt service routine to call when a channel scan is finished.

Parameters
funcISR to call.

Reimplemented from PhysicalLayer.

◆ setCrcFiltering()

int16_t SX127x::setCrcFiltering ( bool  enable = true)

Enable CRC filtering and generation.

Parameters
enableSet or unset CRC filtering and generation.
Returns
Status Codes

◆ setCurrentLimit()

int16_t SX127x::setCurrentLimit ( uint8_t  currentLimit)

Sets current limit for over current protection at transmitter amplifier. Allowed values range from 45 to 120 mA in 5 mA steps and 120 to 240 mA in 10 mA steps.

Parameters
currentLimitCurrent limit to be set (in mA).
Returns
Status Codes

◆ setDio0Action()

void SX127x::setDio0Action ( void(*)(void)  func,
uint32_t  dir 
)

Set interrupt service routine function to call when DIO0 activates.

Parameters
funcPointer to interrupt service routine.
dirSignal change direction.

◆ setDio1Action()

void SX127x::setDio1Action ( void(*)(void)  func,
uint32_t  dir 
)

Set interrupt service routine function to call when DIO1 activates.

Parameters
funcPointer to interrupt service routine.
dirSignal change direction.

◆ setDIOMapping()

int16_t SX127x::setDIOMapping ( uint32_t  pin,
uint32_t  value 
)
overridevirtual

Configure DIO pin mapping to get a given signal on a DIO pin (if available).

Parameters
pinPin number onto which a signal is to be placed.
valueThe value that indicates which function to place on that pin. See chip datasheet for details.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ setDIOPreambleDetect()

int16_t SX127x::setDIOPreambleDetect ( bool  usePreambleDetect)

Configure DIO mapping to use RSSI or Preamble Detect for pins that support it.

Parameters
usePreambleDetectWhether to use PreambleDetect (true) or RSSI (false) on the pins that are mapped to this function.
Returns
Status Codes

◆ setDirectAction()

void SX127x::setDirectAction ( void(*)(void)  func)
overridevirtual

Set interrupt service routine function to call when data bit is received in direct mode.

Parameters
funcPointer to interrupt service routine.

Reimplemented from PhysicalLayer.

◆ setEncoding()

int16_t SX127x::setEncoding ( uint8_t  encoding)
overridevirtual

Sets transmission encoding. Only available in FSK mode. Allowed values are RADIOLIB_ENCODING_NRZ, RADIOLIB_ENCODING_MANCHESTER and RADIOLIB_ENCODING_WHITENING.

Parameters
encodingEncoding to be used.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ setFHSSHoppingPeriod()

int16_t SX127x::setFHSSHoppingPeriod ( uint8_t  freqHoppingPeriod)

Sets the hopping period and enables FHSS.

Parameters
freqHoppingPeriodInteger multiple of symbol periods between hops
Returns
Status Codes

◆ setFifoEmptyAction()

void SX127x::setFifoEmptyAction ( void(*)(void)  func)

Set interrupt service routine function to call when FIFO is empty.

Parameters
funcPointer to interrupt service routine.

◆ setFifoFullAction()

void SX127x::setFifoFullAction ( void(*)(void)  func)

Set interrupt service routine function to call when FIFO is full.

Parameters
funcPointer to interrupt service routine.

◆ setFifoThreshold()

void SX127x::setFifoThreshold ( uint8_t  threshold)

Set FIFO threshold level. Be aware that threshold is also set in setFifoFullAction method. setFifoThreshold method must be called AFTER calling setFifoFullAction!

Parameters
thresholdThreshold level in bytes.

◆ setFrequencyDeviation()

int16_t SX127x::setFrequencyDeviation ( float  freqDev)
overridevirtual

Sets FSK frequency deviation from carrier frequency. Allowed values depend on bit rate setting and must be lower than 200 kHz. Only available in FSK mode.

Parameters
freqDevFrequency deviation to be set (in kHz).
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ setIrqFlags()

int16_t SX127x::setIrqFlags ( uint32_t  irq)
overridevirtual

Set interrupt on DIO1 to be sent on a specific IRQ bit (e.g. RxTimeout, CadDone). NOTE: Unlike other modules that support IRQ abstraction (SX126x, LR11x0, etc.), SX127x cannot configure multiple IRQs to signal using the same DIOx pin. This method tries to configure IRQs in a "best effort" approach, and will skip conflicting flags. RADIOLIB_ERR_INVALID_IRQ will be returned in this case.

Parameters
irqModule-specific IRQ flags.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ setLowBatteryThreshold()

int16_t SX127x::setLowBatteryThreshold ( int8_t  level,
uint32_t  pin = RADIOLIB_NC 
)

Set low battery indicator threshold.

Parameters
levelBattery threshold level (one of RADIOLIB_SX127X_LOW_BAT_THRESHOLD_*), or -1 to disable the detector. Disabled by default. Note that this will not attach any interrupts!
pinDIO pin number which will be used to signal low battery. Only DIO0/4 can be used (in packet mode) or DIO3/4 (in continuous mode). Ignored when disabling the detector.
Returns
Status Codes

◆ setNodeAddress()

int16_t SX127x::setNodeAddress ( uint8_t  nodeAddr)

Sets FSK node address. Calling this method will enable address filtering. Only available in FSK mode.

Parameters
nodeAddrNode address to be set.
Returns
Status Codes

◆ setOOK()

int16_t SX127x::setOOK ( bool  enableOOK)

Enables/disables OOK modulation instead of FSK.

Parameters
enableOOKEnable (true) or disable (false) OOK.
Returns
Status Codes

◆ setOokFixedOrFloorThreshold()

int16_t SX127x::setOokFixedOrFloorThreshold ( uint8_t  value)

Fixed threshold for the Data Slicer in OOK mode or floor threshold for the Data Slicer in OOK when Peak mode is used.

Parameters
valueThreshold level in steps of 0.5 dB.
Returns
Status Codes

◆ setOokPeakThresholdDecrement()

int16_t SX127x::setOokPeakThresholdDecrement ( uint8_t  value)

Period of decrement of the RSSI threshold in the OOK demodulator.

Parameters
valueUse defines RADIOLIB_SX127X_OOK_PEAK_THRESH_DEC_X_X_CHIP
Returns
Status Codes

◆ setOokPeakThresholdStep()

int16_t SX127x::setOokPeakThresholdStep ( uint8_t  value)

Size of each decrement of the RSSI threshold in the OOK demodulator.

Parameters
valueStep size: RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_0_5_DB (default), RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_1_0_DB, RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_1_5_DB, RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_2_0_DB, RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_3_0_DB, RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_4_0_DB, RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_5_0_DB, RADIOLIB_SX127X_OOK_PEAK_THRESH_STEP_6_0_DB
Returns
Status Codes

◆ setOokThresholdType()

int16_t SX127x::setOokThresholdType ( uint8_t  type)

Selects the type of threshold in the OOK data slicer.

Parameters
typeThreshold type: SX127X_OOK_THRESH_PEAK(default), SX127X_OOK_THRESH_FIXED, SX127X_OOK_THRESH_AVERAGE
Returns
Status Codes

◆ setPacketReceivedAction()

void SX127x::setPacketReceivedAction ( void(*)(void)  func)
overridevirtual

Sets interrupt service routine to call when a packet is received.

Parameters
funcISR to call.

Reimplemented from PhysicalLayer.

◆ setPacketSentAction()

void SX127x::setPacketSentAction ( void(*)(void)  func)
overridevirtual

Sets interrupt service routine to call when a packet is sent.

Parameters
funcISR to call.

Reimplemented from PhysicalLayer.

◆ setPreambleLength()

int16_t SX127x::setPreambleLength ( size_t  preambleLength)
overridevirtual

Sets LoRa or FSK preamble length. Allowed values range from 6 to 65535 in LoRa mode or 0 to 65535 in FSK mode.

Parameters
preambleLengthPreamble length to be set (in symbols when in LoRa mode or bits in FSK mode).
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ setRfSwitchPins()

void SX127x::setRfSwitchPins ( uint32_t  rxEn,
uint32_t  txEn 
)

Some modules contain external RF switch controlled by pins. This function gives RadioLib control over those pins to automatically switch between various modes: When idle both pins will be LOW, during TX the txEn pin will be HIGH, during RX the rxPin will be HIGH.

Radiolib will automatically set the pin mode and value of these pins, so do not control them from the sketch.

When more than two pins or more control over the output values are needed, use the setRfSwitchTable() function.

Parameters
rxEnRX enable pin.
txEnTX enable pin.

◆ setRfSwitchTable()

void SX127x::setRfSwitchTable ( const uint32_t(&)  pins[Module::RFSWITCH_MAX_PINS],
const Module::RfSwitchMode_t  table[] 
)

Some modules contain external RF switch controlled by pins. This function gives RadioLib control over those pins to automatically switch between various modes.

Radiolib will automatically set the pin mode and value of these pins, so do not control them from the sketch.

Parameters
pinsA reference to an array of pins to control. This should always be an array of 3 elements. If you need less pins, use RADIOLIB_NC for the unused elements.
tableA reference to an array of pin values to use for each supported mode. Each element is an RfSwitchMode_T struct that lists the mode for which it applies and the values for each of the pins passed in the pins argument respectively.

The pins array will be copied into the Module object, so the original array can be deallocated after this call. However, a reference to the table array will be stored, so that array must remain valid as long RadioLib is being used.

The mode field in each table row should normally use any of the MODE_* constants from the Module::OpMode_t enum. However, some radios support additional modes and will define their own OpMode_t enum.

The length of the table is variable (to support radios that add additional modes), so the table must always be terminated with the special END_OF_MODE_TABLE value.

Normally all modes should be listed in the table, but for some radios, modes can be omitted to indicate they are not supported (e.g. when a radio has a high power and low power TX mode but external circuitry only supports low power). If applicable, this is documented in the radio class itself.

Example

For example, on a board that has an RF switch with an enable pin connected to PA0 and a TX/RX select pin connected to PA1:

// In global scope, define the pin array and mode table
static const uint32_t rfswitch_pins[] =
{PA0, PA1, RADIOLIB_NC};
static const Module::RfSwitchMode_t rfswitch_table[] = {
{Module::MODE_IDLE, {LOW, LOW}},
{Module::MODE_RX, {HIGH, LOW}},
{Module::MODE_TX, {HIGH, HIGH}},
Module::END_OF_MODE_TABLE,
};
void setup() {
...
// Then somewhere in setup, pass them to radiolib
radio.setRfSwitchTable(rfswitch_pins, rfswitch_table);
...
}
@ MODE_TX
Transmission mode.
Definition: Module.h:119
@ MODE_IDLE
Idle mode.
Definition: Module.h:113
@ MODE_RX
Receive mode.
Definition: Module.h:116
Description of RF switch pin states for a single mode. See setRfSwitchTable for details.
Definition: Module.h:89

◆ setRSSIConfig()

int16_t SX127x::setRSSIConfig ( uint8_t  smoothingSamples,
int8_t  offset = 0 
)

Sets RSSI measurement configuration in FSK mode.

Parameters
smoothingSamplesNumber of samples taken to average the RSSI result. numSamples = 2 ^ (1 + smoothingSamples), allowed values are in range 0 (2 samples) - 7 (256 samples)
offsetSigned RSSI offset that will be automatically compensated. 1 dB per LSB, defaults to 0, allowed values are in range -16 dB to +15 dB.
Returns
Status Codes

◆ setRSSIThreshold()

int16_t SX127x::setRSSIThreshold ( float  dbm)

Sets the RSSI value above which the RSSI interrupt is signaled.

Parameters
dbmA dBm value between -127.5 and 0 inclusive
Returns
Status Codes

◆ setRxBandwidth()

int16_t SX127x::setRxBandwidth ( float  rxBw)

Sets FSK receiver bandwidth. Allowed values range from 2.6 to 250 kHz. Only available in FSK mode.

Parameters
rxBwReceiver bandwidth to be set (in kHz).
Returns
Status Codes

◆ setSyncWord() [1/2]

int16_t SX127x::setSyncWord ( uint8_t *  syncWord,
size_t  len 
)
overridevirtual

Sets FSK sync word. Allowed sync words are up to 8 bytes long and can not contain null bytes. Only available in FSK mode.

Parameters
syncWordSync word array.
lenSync word length (in bytes).
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ setSyncWord() [2/2]

int16_t SX127x::setSyncWord ( uint8_t  syncWord)

Sets LoRa sync word. Only available in LoRa mode.

Parameters
syncWordSync word to be set.
Returns
Status Codes

◆ sleep()

int16_t SX127x::sleep ( )
overridevirtual

Sets the LoRa module to sleep to save power. Module will not be able to transmit or receive any data while in sleep mode. Module will wake up automatically when methods like transmit or receive are called.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ standby() [1/2]

int16_t SX127x::standby ( )
overridevirtual

Sets the LoRa module to standby.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ standby() [2/2]

int16_t SX127x::standby ( uint8_t  mode)
overridevirtual

Sets the LoRa module to standby.

Parameters
modeStandby mode to be used. No effect, implemented only for PhysicalLayer compatibility.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ startChannelScan()

int16_t SX127x::startChannelScan ( )
overridevirtual

Interrupt-driven channel activity detection method. DIO0 will be activated when LoRa preamble is detected. DIO1 will be activated if there's no preamble detected before timeout.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ startReceive() [1/2]

int16_t SX127x::startReceive ( )
overridevirtual

Interrupt-driven receive method with default parameters. Implemented for compatibility with PhysicalLayer.

Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ startReceive() [2/2]

int16_t SX127x::startReceive ( uint32_t  timeout,
RadioLibIrqFlags_t  irqFlags = RADIOLIB_IRQ_RX_DEFAULT_FLAGS,
RadioLibIrqFlags_t  irqMask = RADIOLIB_IRQ_RX_DEFAULT_MASK,
size_t  len = 0 
)
overridevirtual

Interrupt-driven receive method, implemented for compatibility with PhysicalLayer.

Parameters
timeoutReceive mode type and/or raw timeout value in symbols. When set to 0, the timeout will be infinite and the device will remain in Rx mode until explicitly commanded to stop (Rx continuous mode). When non-zero (maximum 1023), the device will be set to Rx single mode and timeout will be set.
irqFlagsSets the IRQ flags, defaults to RX done, RX timeout, CRC error and header error.
irqMaskSets the mask of IRQ flags that will trigger DIO1, defaults to RX done.
lenExpected length of packet to be received. Required for LoRa spreading factor 6.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ startTransmit() [1/3]

int16_t PhysicalLayer::startTransmit

Interrupt-driven Arduino String transmit method. Unlike the standard transmit method, this one is non-blocking. Interrupt pin will be activated when transmission finishes.

Parameters
strC-string that will be transmitted.
addrNode address to transmit the packet to. Only used in FSK mode.
Returns
Status Codes

◆ startTransmit() [2/3]

int16_t PhysicalLayer::startTransmit

Interrupt-driven binary transmit method.

Parameters
dataBinary data that will be transmitted.
lenLength of binary data to transmit (in bytes).
addrNode address to transmit the packet to. Only used in FSK mode.
Returns
Status Codes

◆ startTransmit() [3/3]

int16_t SX127x::startTransmit ( const uint8_t *  data,
size_t  len,
uint8_t  addr = 0 
)
overridevirtual

Interrupt-driven binary transmit method. Will start transmitting arbitrary binary data up to 255 bytes long using LoRa or up to 63 bytes using FSK modem.

Parameters
dataBinary data that will be transmitted.
lenLength of binary data to transmit (in bytes).
addrNode address to transmit the packet to. Only used in FSK mode.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ transmit() [1/3]

int16_t PhysicalLayer::transmit

C-string transmit method.

Parameters
strC-string that will be transmitted.
addrNode address to transmit the packet to. Only used in FSK mode.
Returns
Status Codes

◆ transmit() [2/3]

int16_t PhysicalLayer::transmit

Binary transmit method. Must be implemented in module class.

Parameters
dataBinary data that will be transmitted.
lenLength of binary data to transmit (in bytes).
addrNode address to transmit the packet to. Only used in FSK mode.
Returns
Status Codes

◆ transmit() [3/3]

int16_t SX127x::transmit ( const uint8_t *  data,
size_t  len,
uint8_t  addr = 0 
)
overridevirtual

Binary transmit method. Will transmit arbitrary binary data up to 255 bytes long using LoRa or up to 63 bytes using FSK modem. For overloads to transmit Arduino String or C-string, see PhysicalLayer::transmit.

Parameters
dataBinary data that will be transmitted.
lenLength of binary data to transmit (in bytes).
addrNode address to transmit the packet to. Only used in FSK mode.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ transmitDirect()

int16_t SX127x::transmitDirect ( uint32_t  frf = 0)
overridevirtual

Enables direct transmission mode on pins DIO1 (clock) and DIO2 (data). While in direct mode, the module will not be able to transmit or receive packets. Can only be activated in FSK mode.

Parameters
frf24-bit raw frequency value to start transmitting at. Required for quick frequency shifts in RTTY.
Returns
Status Codes

Reimplemented from PhysicalLayer.

◆ variablePacketLengthMode()

int16_t SX127x::variablePacketLengthMode ( uint8_t  maxLen = RADIOLIB_SX127X_MAX_PACKET_LENGTH_FSK)

Set modem in variable packet length mode. Available in FSK mode only.

Parameters
maxLenMaximum packet length.
Returns
Status Codes

The documentation for this class was generated from the following files: