RadioLib/examples/RF69/RF69_Transmit_Interrupt/RF69_Transmit_Interrupt.ino

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4.0 KiB
C++

/*
RadioLib RF69 Transmit with Interrupts Example
This example transmits FSK packets with one second delays
between them. Each packet contains up to 64 bytes
of data, in the form of:
- Arduino String
- null-terminated char array (C-string)
- arbitrary binary data (byte array)
For default module settings, see the wiki page
https://github.com/jgromes/RadioLib/wiki/Default-configuration#rf69sx1231
For full API reference, see the GitHub Pages
https://jgromes.github.io/RadioLib/
*/
// include the library
#include <RadioLib.h>
// RF69 has the following connections:
// CS pin: 10
// DIO0 pin: 2
// RESET pin: 3
RF69 radio = new Module(10, 2, 3);
// or using RadioShield
// https://github.com/jgromes/RadioShield
//RF69 radio = RadioShield.ModuleA;
// save transmission state between loops
int transmissionState = RADIOLIB_ERR_NONE;
void setup() {
Serial.begin(9600);
// initialize RF69 with default settings
Serial.print(F("[RF69] Initializing ... "));
int state = radio.begin();
if (state == RADIOLIB_ERR_NONE) {
Serial.println(F("success!"));
} else {
Serial.print(F("failed, code "));
Serial.println(state);
while (true);
}
// set the function that will be called
// when packet transmission is finished
radio.setDio0Action(setFlag);
// NOTE: some RF69 modules use high power output,
// those are usually marked RF69H(C/CW).
// To configure RadioLib for these modules,
// you must call setOutputPower() with
// second argument set to true.
/*
Serial.print(F("[RF69] Setting high power module ... "));
state = radio.setOutputPower(20, true);
if (state == RADIOLIB_ERR_NONE) {
Serial.println(F("success!"));
} else {
Serial.print(F("failed, code "));
Serial.println(state);
while (true);
}
*/
// start transmitting the first packet
Serial.print(F("[RF69] Sending first packet ... "));
// you can transmit C-string or Arduino string up to
// 64 characters long
transmissionState = radio.startTransmit("Hello World!");
// you can also transmit byte array up to 64 bytes long
/*
byte byteArr[] = {0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF};
state = radio.startTransmit(byteArr, 8);
*/
}
// flag to indicate that a packet was sent
volatile bool transmittedFlag = false;
// disable interrupt when it's not needed
volatile bool enableInterrupt = true;
// this function is called when a complete packet
// is transmitted by the module
// IMPORTANT: this function MUST be 'void' type
// and MUST NOT have any arguments!
void setFlag(void) {
// check if the interrupt is enabled
if(!enableInterrupt) {
return;
}
// we sent a packet, set the flag
transmittedFlag = true;
}
void loop() {
// check if the previous transmission finished
if(transmittedFlag) {
// disable the interrupt service routine while
// processing the data
enableInterrupt = false;
// reset flag
transmittedFlag = false;
if (transmissionState == RADIOLIB_ERR_NONE) {
// packet was successfully sent
Serial.println(F("transmission finished!"));
// NOTE: when using interrupt-driven transmit method,
// it is not possible to automatically measure
// transmission data rate using getDataRate()
} else {
Serial.print(F("failed, code "));
Serial.println(transmissionState);
}
// wait a second before transmitting again
delay(1000);
// send another one
Serial.print(F("[RF69] Sending another packet ... "));
// you can transmit C-string or Arduino string up to
// 256 characters long
transmissionState = radio.startTransmit("Hello World!");
// you can also transmit byte array up to 64 bytes long
/*
byte byteArr[] = {0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF};
int state = radio.startTransmit(byteArr, 8);
*/
// we're ready to send more packets,
// enable interrupt service routine
enableInterrupt = true;
}
}