133 lines
3.2 KiB
C++
133 lines
3.2 KiB
C++
/*
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RadioLib RF69 Receive with Interrupts Example
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This example listens for FSK transmissions and tries to
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receive them. Once a packet is received, an interrupt is
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triggered.
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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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// RF69 has the following connections:
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// NSS pin: 10
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// DIO0 pin: 2
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// DIO1 pin: 3
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RF69 rf = new Module(10, 2, 3);
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// or using RadioShield
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// https://github.com/jgromes/RadioShield
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//RF69 rf = RadioShield.ModuleA;
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void setup() {
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Serial.begin(9600);
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// initialize RF69 with default settings
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Serial.print(F("[RF69] Initializing ... "));
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// carrier frequency: 434.0 MHz
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// bit rate: 48.0 kbps
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// Rx bandwidth: 125.0 kHz
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// frequency deviation: 50.0 kHz
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// output power: 13 dBm
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// sync word: 0x2D01
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int state = rf.begin();
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if (state == 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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rf.setDio0Action(setFlag);
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// start listening for packets
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Serial.print(F("[RF69] Starting to listen ... "));
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state = rf.startReceive();
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if (state == 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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// rf.standby()
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// rf.sleep()
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// rf.transmit();
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// rf.receive();
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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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// disable interrupt when it's not needed
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volatile bool enableInterrupt = true;
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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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void setFlag(void) {
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// check if the interrupt is enabled
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if(!enableInterrupt) {
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return;
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}
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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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// disable the interrupt service routine while
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// processing the data
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enableInterrupt = false;
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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 = rf.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 state = lora.receive(byteArr, 8);
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*/
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if (state == ERR_NONE) {
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// packet was successfully received
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Serial.println(F("[RF69] Received packet!"));
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// print data of the packet
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Serial.print(F("[RF69] Data:\t\t\t"));
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Serial.println(str);
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} else if (state == 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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// we're ready to receive more packets,
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// enable interrupt service routine
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enableInterrupt = true;
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}
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}
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