84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
/*
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RadioLib SX128x Ranging Example
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This example performs ranging exchange between two
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SX1280 LoRa radio modules. Ranging allows to measure
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distance between the modules using time-of-flight
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measurement.
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Only SX1280 and SX1282 support ranging!
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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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// SX1280 has the following connections:
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// NSS pin: 10
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// DIO1 pin: 2
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// NRST pin: 3
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// BUSY pin: 9
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SX1280 lora = new Module(10, 2, 3, 9);
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// or using RadioShield
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// https://github.com/jgromes/RadioShield
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//SX1280 lora = RadioShield.ModuleA;
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void setup() {
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Serial.begin(9600);
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// initialize SX1280 with default settings
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Serial.print(F("[SX1280] Initializing ... "));
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// carrier frequency: 2400.0 MHz
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// bandwidth: 812.5 kHz
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// spreading factor: 9
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// coding rate: 7
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// output power: 10 dBm
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// preamble length: 12 symbols
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// CRC: enabled
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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("[SX1280] Ranging ... "));
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// start ranging exchange
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// range as master: true
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// slave address: 0x12345678
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int state = lora.range(true, 0x12345678);
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// the other module must be configured as slave with the same address
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/*
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int state = lora.range(false, 0x12345678);
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*/
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if (state == ERR_NONE) {
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// ranging finished successfully
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Serial.println(F("success!"));
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Serial.print(F("[SX1280] Distance:\t\t\t"));
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Serial.print(lora.getRangingResult());
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Serial.println(F(" meters"));
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} else if (state == ERR_RANGING_TIMEOUT) {
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// timed out waiting for ranging packet
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Serial.println(F("timed out!"));
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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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// wait for a second before ranging again
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delay(1000);
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}
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