80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/*
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RadioLib SX127x Transmit Example
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This example transmits packets using SX1278 LoRa radio module.
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Each packet contains up to 256 bytes 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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}
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void loop() {
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Serial.print(F("[SX1278] Transmitting 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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// NOTE: transmit() is a blocking method!
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// See example SX127x_Transmit_Interrupt for details
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// on non-blocking transmission method.
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int state = lora.transmit("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, 0x78, 0xAB, 0xCD, 0xEF};
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int state = lora.transmit(byteArr, 8);
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*/
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if (state == ERR_NONE) {
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// the packet was successfully transmitted
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Serial.println(" success!");
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// print measured data rate
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Serial.print("[SX1278] Datarate:\t");
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Serial.print(lora.getDataRate());
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Serial.println(" bps");
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} else if (state == ERR_PACKET_TOO_LONG) {
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// the supplied packet was longer than 256 bytes
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Serial.println(" too long!");
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} else if (state == ERR_TX_TIMEOUT) {
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// timeout occured while transmitting packet
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Serial.println(" timeout!");
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}
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// wait for a second before transmitting again
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delay(1000);
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}
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