This BL602 demo firmware transmits and receives LoRa packets by calling the SX1262 / SX1276 drivers...
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The demo firmware is configured for LoRa 923 MHz.
To select the LoRa Frequency, change #define USE_BAND_923 to USE_BAND_433, USE_BAND_780, USE_BAND_868, USE_BAND_915 or USE_BAND_923 in sdk_app_lora/demo.c...
/// TODO: We are using LoRa Frequency 923 MHz for Singapore. Change this for your region.
#define USE_BAND_923
#if defined(USE_BAND_433)
#define RF_FREQUENCY 434000000 /* Hz */
#elif defined(USE_BAND_780)
#define RF_FREQUENCY 780000000 /* Hz */
#elif defined(USE_BAND_868)
#define RF_FREQUENCY 868000000 /* Hz */
#elif defined(USE_BAND_915)
#define RF_FREQUENCY 915000000 /* Hz */
#elif defined(USE_BAND_923)
#define RF_FREQUENCY 923000000 /* Hz */
#else
#error "Please define a frequency band in the compiler options."
#endif
/// LoRa Parameters
#define LORAPING_TX_OUTPUT_POWER 14 /* dBm */
#define LORAPING_BANDWIDTH 0 /* [0: 125 kHz, */
/* 1: 250 kHz, */
/* 2: 500 kHz, */
/* 3: Reserved] */
#define LORAPING_SPREADING_FACTOR 7 /* [SF7..SF12] */
#define LORAPING_CODINGRATE 1 /* [1: 4/5, */
/* 2: 4/6, */
/* 3: 4/7, */
/* 4: 4/8] */
#define LORAPING_PREAMBLE_LENGTH 8 /* Same for Tx and Rx */
#define LORAPING_SYMBOL_TIMEOUT 5 /* Symbols */
#define LORAPING_FIX_LENGTH_PAYLOAD_ON false
#define LORAPING_IQ_INVERSION_ON false
#define LORAPING_TX_TIMEOUT_MS 3000 /* ms */
#define LORAPING_RX_TIMEOUT_MS 5000 /* ms */
#define LORAPING_BUFFER_SIZE 64 /* LoRa message size */
const uint8_t loraping_ping_msg[] = "PING"; // We send a "PING" messageThe demo firmware is configured for SX1262.
To select SX1276, change lora-sx1262 to lora-sx1276 in Makefile...
# Components needed to transmit and receive LoRa Packets
# For SX1276: Change lora-sx1262 to lora-sx1276
COMPONENTS_LORA := lora-sx1262 nimble-porting-layer
Comment out the lines marked For SX1262 and uncomment the lines marked For SX1276 in sdk_app_lora/demo.c...
// Init the SPI port
SX126xIoInit(); // For SX1262
// SX1276IoInit(); // For SX1276
...
// Read the register
uint8_t val = SX126xReadRegister(addr); // For SX1262
// uint8_t val = SX1276Read(addr); // For SX1276Enter these commands for the SX1262 demo firmware...
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Create the Background Task that will process SX1262 interrupts...
# create_task# init_driver SX126xReset SX126xIoInit SX126X interrupt init SX126X register handler: GPIO 11 SX126xWakeup SX126xGetDeviceId: SX1262 SX126xSetRfTxPower SX126xGetDeviceId: SX1262 -
Transmit a 64-byte LoRa packet...
# send_message RadioOnDioIrq RadioIrqProcess SX126xReadCommand IRQ_TX_DONE Tx done -
Receive a LoRa packet (up to 64 bytes)...
# receive_message SX126xWakeup RadioOnDioIrq RadioIrqProcess SX126xReadCommand IRQ_PREAMBLE_DETECTED RadioOnDioIrq RadioIrqProcess SX126xReadCommand IRQ_HEADER_VALID RadioOnDioIrq RadioIrqProcess SX126xReadCommand IRQ_RX_DONE SX126xReadCommand SX126xReadCommand Rx done: 48 65 6c 6c 6f 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a -
If no LoRa packet is received in 5 seconds, the driver goes to sleep...
# receive_message SX126xWakeup RadioOnRxTimeoutIrq Rx timeout
Enter these commands for the SX1276 demo firmware...
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To see the list of commands...
# help ====Build-in Commands==== ====Support 4 cmds once, seperate by ; ==== help : print this p : print memory m : modify memory echo : echo for command exit : close CLI devname : print device name sysver : system version reboot : reboot system poweroff : poweroff system reset : system reset time : system time ota : system ota ps : thread dump ls : file list hexdump : dump file cat : cat file ====User Commands==== create_task : Create a task put_event : Add an event init_driver : Init LoRa driver send_message : Send LoRa message receive_message : Receive LoRa message read_registers : Read registers spi_result : Show SPI counters blogset : blog pri set level blogdump : blog info dump bl_sys_time_now : sys time now -
Create the Background Task that will process SX1276 interrupts...
# create_task# init_driver SX1276 init SX1276 interrupt init SX1276 register handler: GPIO 11 SX1276 register handler: GPIO 0 SX126 register handler: GPIO 5 SX1276 register handler: GPIO 12 TODO: os_cputime_delay_usecs 1000 TODO: os_cputime_delay_usecs 6000 SX1276 DIO3: Channel activity detection -
Transmit a 64-byte LoRa packet...
# send_message -
Receive a LoRa packet (up to 64 bytes)...
# receive_message SX1276 DIO0: Packet received Rx done: RadioEvents.RxDone=0x23000ca6 Rx done: 48 65 6c 6c 6f -
Check the SX1276 and SPI counters...
# spi_result DIO0 Interrupts: 1 DIO1 Interrupts: 0 DIO2 Interrupts: 0 DIO3 Interrupts: 1 DIO4 Interrupts: 0 DIO5 Interrupts: 0 Unknown Int: 0 Tx Interrupts: 302 Tx Status: 0x0 Tx Term Count: 0x0 Tx Error: 0x0 Rx Interrupts: 302 Rx Status: 0x0 Rx Term Count: 0x0 Rx Error: 0x0 -
Receive another LoRa packet...
# receive_message SX1276 DIO0: Packet received Rx done: RadioEvents.RxDone=0x23000ca6 Rx done: 48 65 6c 6c 6f -
The SX1276 and SPI counters have increased...
# spi_result DIO0 Interrupts: 2 DIO1 Interrupts: 0 DIO2 Interrupts: 0 DIO3 Interrupts: 1 DIO4 Interrupts: 0 DIO5 Interrupts: 0 Unknown Int: 0 Tx Interrupts: 354 Tx Status: 0x0 Tx Term Count: 0x0 Tx Error: 0x0 Rx Interrupts: 354 Rx Status: 0x0 Rx Term Count: 0x0 Rx Error: 0x0 -
Receive another LoRa packet...
# receive_message SX1276 DIO0: Packet received Rx done: RadioEvents.RxDone=0x23000ca6 Rx done: 48 65 6c 6c 6f -
The SX1276 and SPI counters have increased again...
# spi_result DIO0 Interrupts: 3 DIO1 Interrupts: 0 DIO2 Interrupts: 0 DIO3 Interrupts: 1 DIO4 Interrupts: 0 DIO5 Interrupts: 0 Unknown Int: 0 Tx Interrupts: 406 Tx Status: 0x0 Tx Term Count: 0x0 Tx Error: 0x0 Rx Interrupts: 406 Rx Status: 0x0 Rx Term Count: 0x0 Rx Error: 0x0 -
Receive one last LoRa packet...
# receive_message SX1276 DIO0: Packet received Rx done: RadioEvents.RxDone=0x23000ca6 Rx done: 48 65 6c 6c 6f -
The SX1276 and SPI counters have increased...
# spi_result DIO0 Interrupts: 4 DIO1 Interrupts: 0 DIO2 Interrupts: 0 DIO3 Interrupts: 1 DIO4 Interrupts: 0 DIO5 Interrupts: 0 Unknown Int: 0 Tx Interrupts: 458 Tx Status: 0x0 Tx Term Count: 0x0 Tx Error: 0x0 Rx Interrupts: 458 Rx Status: 0x0 Rx Term Count: 0x0 Rx Error: 0x0 -
If no LoRa packet is received in 5 seconds, the driver goes to sleep...
# receive_message SX1276 receive timeout Rx timeout