107 lines
3 KiB
C++
107 lines
3 KiB
C++
/*
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RadioLib SX127x Transmit with Inerrupts Example
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This example transmits LoRa packets with one second delays
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between them. Each packet contains up to 256 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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Other modules from SX127x/RFM9x family can also be used.
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*/
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// include the library
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#include <RadioLib.h>
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// SX1278 module is in slot A on the shield
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SX1278 lora = RadioShield.ModuleA;
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void setup() {
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Serial.begin(9600);
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// initialize SX1278 with default settings
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Serial.print(F("[SX1278] Initializing ... "));
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// carrier frequency: 434.0 MHz
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// bandwidth: 125.0 kHz
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// spreading factor: 9
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// coding rate: 7
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// sync word: 0x12
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// output power: 17 dBm
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// current limit: 100 mA
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// preamble length: 8 symbols
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// amplifier gain: 0 (automatic gain control)
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int state = lora.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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lora.setDio0Action(setFlag);
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// start transmitting the first packet
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Serial.print(F("[SX1278] Sending first 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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state = lora.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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state = lora.transmit(byteArr, 8);
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*/
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if (state != ERR_NONE) {
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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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// flag to indicate that a packet was received
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volatile bool transmittedFlag = false;
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void setFlag(void) {
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// packet transmission is finished, 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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Serial.println(F("[SX1278] Packet transmission finished!"));
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// wait one second before next transmission
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delay(1000);
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// send another packet
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Serial.print(F("[SX1278] 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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int state = lora.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 = lora.transmit(byteArr, 8);
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*/
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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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if (state != ERR_NONE) {
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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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