I could need some help with LoRa communication between an T-Beam SoftRF SX1626 and a T-Beam Mashtastic. I tried to use the transmitter and receiver code from:
https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series/tree/master/examples/RadioLibExamples
but this didn't work.
then i used the base of this code (utilities.h, LoRaBoards.h, LoRaBoards.cpp) and changed the main.ino to this:
/*
RadioLib Transmit with Interrupts Example
This example transmits packets using SX1276/SX1278/SX1262/SX1268/SX1280/LR1121 LoRa radio module.
Each packet contains up to 256 bytes of data, in the form of:
- Arduino String
- null-terminated char array (C-string)
- arbitrary binary data (byte array)
For full API reference, see the GitHub Pages
https://jgromes.github.io/RadioLib/
*/
#include "LoRaBoards.h"
#include <RadioLib.h>
// save transmission states between loops
int transmissionState = RADIOLIB_ERR_NONE;
// flag to indicate transmission or reception state
bool transmitFlag = false;
// flag to indicate that a packet was sent or received
volatile bool operationDone = false;
#if defined(USING_SX1276)
#define CONFIG_RADIO_FREQ 868.0
#define CONFIG_RADIO_OUTPUT_POWER 15
#define CONFIG_RADIO_BW 125.0
SX1276 radio = new Module(RADIO_CS_PIN, RADIO_DIO0_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
#elif defined(USING_SX1278)
#define CONFIG_RADIO_FREQ 433.0
#define CONFIG_RADIO_OUTPUT_POWER 17
#define CONFIG_RADIO_BW 125.0
SX1278 radio = new Module(RADIO_CS_PIN, RADIO_DIO0_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
#elif defined(USING_SX1262)
#define CONFIG_RADIO_FREQ 868.0
#define CONFIG_RADIO_OUTPUT_POWER 22
#define CONFIG_RADIO_BW 125.0
SX1262 radio = new Module(RADIO_CS_PIN, RADIO_DIO1_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
#elif defined(USING_SX1280)
#define CONFIG_RADIO_FREQ 2400.0
#define CONFIG_RADIO_OUTPUT_POWER 13
#define CONFIG_RADIO_BW 203.125
#ifdef T3_S3_V1_2_SX1280_PA
// PA Version power range : -18 ~ 3dBm
#undef CONFIG_RADIO_OUTPUT_POWER
#define CONFIG_RADIO_OUTPUT_POWER 3
#endif
SX1280 radio = new Module(RADIO_CS_PIN, RADIO_DIO1_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
#elif defined(USING_SX1268)
#define CONFIG_RADIO_FREQ 433.0
#define CONFIG_RADIO_OUTPUT_POWER 22
#define CONFIG_RADIO_BW 125.0
SX1268 radio = new Module(RADIO_CS_PIN, RADIO_DIO1_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
#elif defined(USING_LR1121)
#define CONFIG_RADIO_FREQ 868.0
#define CONFIG_RADIO_OUTPUT_POWER 22
#define CONFIG_RADIO_BW 125.0
LR1121 radio = new Module(RADIO_CS_PIN, RADIO_DIO9_PIN, RADIO_RST_PIN, RADIO_BUSY_PIN);
#endif
void drawMain();
// flag to indicate that a packet was sent
static volatile bool transmittedFlag = false;
static uint32_t counter = 0;
static String payload;
// this function is called when a complete packet
// is transmitted by the module
// IMPORTANT: this function MUST be 'void' type
// and MUST NOT have any arguments!
void setFlag(void) {
// we sent or received a packet, set the flag
operationDone = true;
}
void setup()
{
setupBoards();
// When the power is turned on, a delay is required.
delay(1500);
int state = radio.begin();
if (state == RADIOLIB_ERR_NONE) {
Serial.println(F("success!"));
} else {
Serial.print(F("failed, code "));
Serial.println(state);
while (true);
}
// set the function that will be called
// when new packet is received
#ifdef USING_SX1262
radio.setDio1Action(setFlag);
#endif
#ifdef USING_SX1276
radio.setDio0Action(setFlag, RISING);
#endif
/*
Sets carrier frequency.
SX1278/SX1276 : Allowed values range from 137.0 MHz to 525.0 MHz.
SX1268/SX1262 : Allowed values are in range from 150.0 to 960.0 MHz.
SX1280 : Allowed values are in range from 2400.0 to 2500.0 MHz.
LR1121 : Allowed values are in range from 150.0 to 960.0 MHz, 1900 - 2200 MHz and 2400 - 2500 MHz. Will also perform calibrations.
* * * */
if (radio.setFrequency(CONFIG_RADIO_FREQ) == RADIOLIB_ERR_INVALID_FREQUENCY) {
Serial.println(F("Selected frequency is invalid for this module!"));
while (true);
}
/*
Sets LoRa link bandwidth.
SX1278/SX1276 : Allowed values are 10.4, 15.6, 20.8, 31.25, 41.7, 62.5, 125, 250 and 500 kHz. Only available in %LoRa mode.
SX1268/SX1262 : Allowed values are 7.8, 10.4, 15.6, 20.8, 31.25, 41.7, 62.5, 125.0, 250.0 and 500.0 kHz.
SX1280 : Allowed values are 203.125, 406.25, 812.5 and 1625.0 kHz.
LR1121 : Allowed values are 62.5, 125.0, 250.0 and 500.0 kHz.
* * * */
if (radio.setBandwidth(CONFIG_RADIO_BW) == RADIOLIB_ERR_INVALID_BANDWIDTH) {
Serial.println(F("Selected bandwidth is invalid for this module!"));
while (true);
}
/*
Sets LoRa link spreading factor.
SX1278/SX1276 : Allowed values range from 6 to 12. Only available in LoRa mode.
SX1262 : Allowed values range from 5 to 12.
SX1280 : Allowed values range from 5 to 12.
LR1121 : Allowed values range from 5 to 12.
* * * */
if (radio.setSpreadingFactor(10) == RADIOLIB_ERR_INVALID_SPREADING_FACTOR) {
Serial.println(F("Selected spreading factor is invalid for this module!"));
while (true);
}
/*
Sets LoRa coding rate denominator.
SX1278/SX1276/SX1268/SX1262 : Allowed values range from 5 to 8. Only available in LoRa mode.
SX1280 : Allowed values range from 5 to 8.
LR1121 : Allowed values range from 5 to 8.
* * * */
if (radio.setCodingRate(6) == RADIOLIB_ERR_INVALID_CODING_RATE) {
Serial.println(F("Selected coding rate is invalid for this module!"));
while (true);
}
/*
Sets LoRa sync word.
SX1278/SX1276/SX1268/SX1262/SX1280 : Sets LoRa sync word. Only available in LoRa mode.
* * */
if (radio.setSyncWord(0xAB) != RADIOLIB_ERR_NONE) {
Serial.println(F("Unable to set sync word!"));
while (true);
}
/*
Sets transmission output power.
SX1278/SX1276 : Allowed values range from -3 to 15 dBm (RFO pin) or +2 to +17 dBm (PA_BOOST pin). High power +20 dBm operation is also supported, on the PA_BOOST pin. Defaults to PA_BOOST.
SX1262 : Allowed values are in range from -9 to 22 dBm. This method is virtual to allow override from the SX1261 class.
SX1268 : Allowed values are in range from -9 to 22 dBm.
SX1280 : Allowed values are in range from -18 to 13 dBm. PA Version range : -18 ~ 3dBm
LR1121 : Allowed values are in range from -9 to 22 dBm (high-power PA) or -17 to 14 dBm (low-power PA)
* * * */
if (radio.setOutputPower(CONFIG_RADIO_OUTPUT_POWER) == RADIOLIB_ERR_INVALID_OUTPUT_POWER) {
Serial.println(F("Selected output power is invalid for this module!"));
while (true);
}
#if !defined(USING_SX1280) && !defined(USING_LR1121)
/*
Sets current limit for over current protection at transmitter amplifier.
SX1278/SX1276 : Allowed values range from 45 to 120 mA in 5 mA steps and 120 to 240 mA in 10 mA steps.
SX1262/SX1268 : Allowed values range from 45 to 120 mA in 2.5 mA steps and 120 to 240 mA in 10 mA steps.
NOTE: set value to 0 to disable overcurrent protection
* * * */
if (radio.setCurrentLimit(140) == RADIOLIB_ERR_INVALID_CURRENT_LIMIT) {
Serial.println(F("Selected current limit is invalid for this module!"));
while (true);
}
#endif
/*
Sets preamble length for LoRa or FSK modem.
SX1278/SX1276 : Allowed values range from 6 to 65535 in %LoRa mode or 0 to 65535 in FSK mode.
SX1262/SX1268 : Allowed values range from 1 to 65535.
SX1280 : Allowed values range from 1 to 65535. preamble length is multiple of 4
LR1121 : Allowed values range from 1 to 65535.
* * */
if (radio.setPreambleLength(16) == RADIOLIB_ERR_INVALID_PREAMBLE_LENGTH) {
Serial.println(F("Selected preamble length is invalid for this module!"));
while (true);
}
// Enables or disables CRC check of received packets.
if (radio.setCRC(false) == RADIOLIB_ERR_INVALID_CRC_CONFIGURATION) {
Serial.println(F("Selected CRC is invalid for this module!"));
while (true);
}
#ifdef USING_DIO2_AS_RF_SWITCH
#ifdef USING_SX1262
// Some SX126x modules use DIO2 as RF switch. To enable
// this feature, the following method can be used.
// NOTE: As long as DIO2 is configured to control RF switch,
// it can't be used as interrupt pin!
if (radio.setDio2AsRfSwitch() != RADIOLIB_ERR_NONE) {
Serial.println(F("Failed to set DIO2 as RF switch!"));
while (true);
}
#endif //USING_SX1262
#endif //USING_DIO2_AS_RF_SWITCH
#ifdef RADIO_RX_PIN
// SX1280 PA Version
radio.setRfSwitchPins(RADIO_RX_PIN, RADIO_TX_PIN);
#endif
#ifdef RADIO_SWITCH_PIN
// T-MOTION
const uint32_t pins[] = {
RADIO_SWITCH_PIN, RADIO_SWITCH_PIN, RADIOLIB_NC,
};
static const Module::RfSwitchMode_t table[] = {
{Module::MODE_IDLE, {0, 0} },
{Module::MODE_RX, {1, 0} },
{Module::MODE_TX, {0, 1} },
END_OF_MODE_TABLE,
};
radio.setRfSwitchTable(pins, table);
#endif
delay(1000);
}
void loop() {
// check if the previous operation finished
if (operationDone) {
// reset flag
operationDone = false;
if (transmitFlag) {
// the previous operation was transmission, listen for response
// print the result
if (transmissionState == RADIOLIB_ERR_NONE) {
// packet was successfully sent
Serial.println(F("transmission finished!"));
} else {
Serial.print(F("failed, code "));
Serial.println(transmissionState);
}
// listen for response
radio.startReceive();
transmitFlag = false;
} else {
// the previous operation was reception
// print data and send another packet
String str;
int state = radio.readData(str);
if (state == RADIOLIB_ERR_NONE) {
// packet was successfully received
Serial.println(F("[SX1262] Received packet!"));
// print data of the packet
Serial.print(F("[SX1262] Data:\t\t"));
Serial.println(str);
// print RSSI (Received Signal Strength Indicator)
Serial.print(F("[SX1262] RSSI:\t\t"));
Serial.print(radio.getRSSI());
Serial.println(F(" dBm"));
// print SNR (Signal-to-Noise Ratio)
Serial.print(F("[SX1262] SNR:\t\t"));
Serial.print(radio.getSNR());
Serial.println(F(" dB"));
}
// wait a second before transmitting again
delay(1000);
// send another one
Serial.print(F("[SX1262] Sending another packet ... "));
transmissionState = radio.startTransmit("Hello World!");
transmitFlag = true;
}
}
}
but the flag is not changed and therefore no packet is sent or received. i use arduino ide for programming. i think it maybe is just a wrong pin ? i also changed between "T_BEAM_SX1262" and "T_BEAM_SX1276" when programming but both boards give the same output which is like:
23:43:26.367 -> ets Jul 29 2019 12:21:46
23:43:26.367 ->
23:43:26.367 -> rst:0x1 (POWERON_RESET),boot:0x13 (S_I_Fdrv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
23:43:26.367 -> mode:DIO, clock div:1
23:43:26.367 -> load:0x3fff0030,len:1184
23:43:26.367 -> load:0x40078000,len:13260
23:43:26.367 -> load:0x40080400,len:3028
23:43:26.367 -> entry 0x400805e4
23:43:26.434 -> setupBoards
23:43:26.434 -> -----------------------------------
23:43:26.434 -> Reset reason: In case of deep sleep, reset was not caused by exit from deep sleep
23:43:26.434 -> PSRAM is disable!
23:43:26.466 -> Flash:4 MB
23:43:26.466 -> Flash speed:80 M
23:43:26.466 -> Model:ESP32-D0WDQ6-V3
23:43:26.466 -> Chip Revision:3
23:43:26.466 -> Freq:240 MHZ
23:43:26.466 -> SDK Ver:v4.4.5
23:43:26.466 -> DATE:Jun 10 2024
23:43:26.466 -> TIME:23:35:19
23:43:26.466 -> EFUSE MAC: C86CA01FB608
23:43:26.466 -> -----------------------------------
23:43:26.466 -> AXP2101 PMU init succeeded, using AXP2101 PMU
23:43:26.500 -> =========================================
23:43:26.500 -> DC1 : + Voltage: 3300 mV
23:43:26.500 -> DC2 : - Voltage: 0500 mV
23:43:26.500 -> DC3 : - Voltage: 0500 mV
23:43:26.500 -> DC4 : - Voltage: 1800 mV
23:43:26.500 -> DC5 : - Voltage: 3300 mV
23:43:26.500 -> ALDO1: - Voltage: 1800 mV
23:43:26.500 -> ALDO2: + Voltage: 3300 mV
23:43:26.500 -> ALDO3: + Voltage: 3300 mV
23:43:26.500 -> ALDO4: - Voltage: 3300 mV
23:43:26.500 -> BLDO1: - Voltage: 1800 mV
23:43:26.500 -> BLDO2: - Voltage: 3300 mV
23:43:26.500 -> =========================================
23:43:26.533 -> PowerKeyPressOffTime:4 Second
23:43:26.533 -> Warning: Failed to find Display at 0x3C address
23:43:26.533 -> init done .
23:43:28.024 -> success!
and then just stop printing anything. maybe someone has an idea how to fix this or debug it ? would be great