135 lines
3.6 KiB
C++
135 lines
3.6 KiB
C++
/*
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RadioLib RF69 Transmit with Interrupts Example
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This example transmits FSK packets with one second delays
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between them. Each packet contains up to 64 bytes
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of data, in the form of:
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- Arduino String
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- null-terminated char array (C-string)
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- arbitrary binary data (byte array)
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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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// save transmission state between loops
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int transmissionState = ERR_NONE;
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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 packet transmission is finished
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rf.setDio0Action(setFlag);
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// start transmitting the first packet
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Serial.print(F("[RF69] Sending first packet ... "));
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// you can transmit C-string or Arduino string up to
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// 64 characters long
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transmissionState = rf.startTransmit("Hello World!");
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// you can also transmit byte array up to 64 bytes long
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/*
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byte byteArr[] = {0x01, 0x23, 0x45, 0x56,
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0x78, 0xAB, 0xCD, 0xEF};
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state = rf.transmit(byteArr, 8);
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*/
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}
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// flag to indicate that a packet was sent
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volatile bool transmittedFlag = 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 transmitted 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 sent a packet, set the flag
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transmittedFlag = true;
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}
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void loop() {
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// check if the previous transmission finished
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if(transmittedFlag) {
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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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transmittedFlag = false;
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if (transmissionState == ERR_NONE) {
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// packet was successfully sent
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Serial.println(F("transmission finished!"));
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// NOTE: when using interrupt-driven transmit method,
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// it is not possible to automatically measure
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// transmission data rate using getDataRate()
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} else {
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Serial.print(F("failed, code "));
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Serial.println(transmissionState);
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}
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// wait a second before transmitting again
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delay(1000);
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// send another one
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Serial.print(F("[RF69] Sending another packet ... "));
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// you can transmit C-string or Arduino string up to
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// 256 characters long
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transmissionState = rf.startTransmit("Hello World!");
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// you can also transmit byte array up to 256 bytes long
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/*
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byte byteArr[] = {0x01, 0x23, 0x45, 0x56,
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0x78, 0xAB, 0xCD, 0xEF};
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int state = rf.transmit(byteArr, 8);
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*/
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// we're ready to send 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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