kopia lustrzana https://github.com/jgromes/RadioLib
139 wiersze
3.5 KiB
C++
139 wiersze
3.5 KiB
C++
/*
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RadioLib LR11x0 Receive with Interrupts Example
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This example listens for LoRa transmissions and tries to
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receive them. Once a packet is received, an interrupt is
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triggered. To successfully receive data, the following
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settings have to be the same on both transmitter
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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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Other modules from LR11x0 family can also be used.
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For default module settings, see the wiki page
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https://github.com/jgromes/RadioLib/wiki/Default-configuration#lr11x0---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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// LR1110 has the following connections:
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// NSS pin: 10
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// DIO1 pin: 2
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// NRST pin: 3
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// BUSY pin: 9
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LR1110 radio = new Module(10, 2, 3, 9);
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// or using RadioShield
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// https://github.com/jgromes/RadioShield
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//LR1110 radio = RadioShield.ModuleA;
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void setup() {
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Serial.begin(9600);
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// initialize LR1110 with default settings
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Serial.print(F("[LR1110] Initializing ... "));
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int state = radio.begin();
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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 the function that will be called
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// when new packet is received
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radio.setPacketReceivedAction(setFlag);
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// start listening for LoRa packets
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Serial.print(F("[LR1110] Starting to listen ... "));
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state = radio.startReceive();
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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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// if needed, 'listen' mode can be disabled by calling
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// any of the following methods:
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//
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// radio.standby()
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// radio.sleep()
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// radio.transmit();
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// radio.receive();
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// radio.scanChannel();
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}
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// flag to indicate that a packet was received
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volatile bool receivedFlag = false;
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// this function is called when a complete packet
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// is received by the module
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// IMPORTANT: this function MUST be 'void' type
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// and MUST NOT have any arguments!
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#if defined(ESP8266) || defined(ESP32)
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ICACHE_RAM_ATTR
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#endif
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void setFlag(void) {
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// we got a packet, set the flag
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receivedFlag = true;
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}
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void loop() {
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// check if the flag is set
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if(receivedFlag) {
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// reset flag
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receivedFlag = false;
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// you can read received data as an Arduino String
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String str;
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int state = radio.readData(str);
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// you can also read received data as byte array
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/*
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byte byteArr[8];
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int numBytes = radio.getPacketLength();
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int state = radio.readData(byteArr, numBytes);
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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("[LR1110] Received packet!"));
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// print data of the packet
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Serial.print(F("[LR1110] Data:\t\t"));
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Serial.println(str);
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// print RSSI (Received Signal Strength Indicator)
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Serial.print(F("[LR1110] RSSI:\t\t"));
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Serial.print(radio.getRSSI());
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Serial.println(F(" dBm"));
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// print SNR (Signal-to-Noise Ratio)
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Serial.print(F("[LR1110] 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_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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}
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