kopia lustrzana https://github.com/jgromes/RadioLib
129 wiersze
3.7 KiB
C++
129 wiersze
3.7 KiB
C++
/*
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RadioLib STM32WLx Blocking Receive Example
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This example listens for LoRa transmissions using STM32WL MCU with
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integrated (SX126x) LoRa radio.
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To successfully receive data, the following settings have to be the same
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on both transmitter and receiver:
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- carrier frequency
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- bandwidth
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- spreading factor
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- coding rate
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- sync word
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- preamble length
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This example assumes Nucleo WL55JC1 is used. For other Nucleo boards
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or standalone STM32WL, some configuration such as TCXO voltage and
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RF switch control may have to be adjusted.
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Using blocking receive is not recommended, as it will lead
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to significant amount of timeouts, inefficient use of processor
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time and can some miss packets!
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Instead, interrupt receive is recommended.
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For default module settings, see the wiki page
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https://github.com/jgromes/RadioLib/wiki/Default-configuration#sx126x---lora-modem
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For full API reference, see the GitHub Pages
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https://jgromes.github.io/RadioLib/
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*/
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// include the library
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#include <RadioLib.h>
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// no need to configure pins, signals are routed to the radio internally
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STM32WLx radio = new STM32WLx_Module();
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// set RF switch configuration for Nucleo WL55JC1
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// NOTE: other boards may be different!
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// Some boards may not have either LP or HP.
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// For those, do not set the LP/HP entry in the table.
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static const uint32_t rfswitch_pins[] =
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{PC3, PC4, PC5};
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static const Module::RfSwitchMode_t rfswitch_table[] = {
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{STM32WLx::MODE_IDLE, {LOW, LOW, LOW}},
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{STM32WLx::MODE_RX, {HIGH, HIGH, LOW}},
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{STM32WLx::MODE_TX_LP, {HIGH, HIGH, HIGH}},
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{STM32WLx::MODE_TX_HP, {HIGH, LOW, HIGH}},
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END_OF_MODE_TABLE,
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};
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void setup() {
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Serial.begin(9600);
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// set RF switch control configuration
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// this has to be done prior to calling begin()
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radio.setRfSwitchTable(rfswitch_pins, rfswitch_table);
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// initialize STM32WL with default settings, except frequency
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Serial.print(F("[STM32WL] Initializing ... "));
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int state = radio.begin(868.0);
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if (state == RADIOLIB_ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code "));
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Serial.println(state);
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while (true);
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}
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// set appropriate TCXO voltage for Nucleo WL55JC1
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state = radio.setTCXO(1.7);
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if (state == RADIOLIB_ERR_NONE) {
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Serial.println(F("success!"));
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} else {
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Serial.print(F("failed, code "));
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Serial.println(state);
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while (true);
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}
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}
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void loop() {
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Serial.print(F("[STM32WL] Waiting for incoming transmission ... "));
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// you can receive data as an Arduino String
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String str;
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int state = radio.receive(str);
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// you can also receive data as byte array
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/*
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byte byteArr[8];
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int state = radio.receive(byteArr, 8);
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*/
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if (state == RADIOLIB_ERR_NONE) {
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// packet was successfully received
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Serial.println(F("success!"));
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// print the data of the packet
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Serial.print(F("[STM32WL] Data:\t\t"));
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Serial.println(str);
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// print the RSSI (Received Signal Strength Indicator)
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// of the last received packet
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Serial.print(F("[STM32WL] RSSI:\t\t"));
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Serial.print(radio.getRSSI());
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Serial.println(F(" dBm"));
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// print the SNR (Signal-to-Noise Ratio)
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// of the last received packet
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Serial.print(F("[STM32WL] SNR:\t\t"));
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Serial.print(radio.getSNR());
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Serial.println(F(" dB"));
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} else if (state == RADIOLIB_ERR_RX_TIMEOUT) {
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// timeout occurred while waiting for a packet
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Serial.println(F("timeout!"));
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} else if (state == RADIOLIB_ERR_CRC_MISMATCH) {
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// packet was received, but is malformed
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Serial.println(F("CRC error!"));
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} else {
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// some other error occurred
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Serial.print(F("failed, code "));
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Serial.println(state);
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}
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}
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