62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
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* KiteLib SX127x Channel Activity Detection Example
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*
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* This example scans the current LoRa channel using SX1278 LoRa radio module
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* and detects valid LoRa preambles. Preamble is the first part of LoRa transmission,
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* so this can be used to check if the LoRa channel is free,
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* or if you should start receiving a message.
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*
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* Other modules from SX127x family can also be used.
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* SX1272 lora = Kite.ModuleA;
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* SX1273 lora = Kite.ModuleA;
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* SX1276 lora = Kite.ModuleA;
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* SX1277 lora = Kite.ModuleA;
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* SX1279 lora = Kite.ModuleA;
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*/
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// include the library
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#include <KiteLib.h>
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// SX1278 module is in slot A on the shield
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SX1278 lora = Kite.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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byte 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 0x"));
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Serial.println(state, HEX);
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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("Scanning channel for LoRa preamble ... "));
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// start scanning current channel
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uint8_t state = lora.scanChannel();
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if(state == PREAMBLE_DETECTED) {
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// LoRa preamble was detected
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Serial.println(" detected preamble!");
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} else if(state == CHANNEL_FREE) {
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// no preamble was detected, channel is free
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Serial.println(" channel is free!");
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}
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// wait 100 ms before new scan
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delay(100);
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}
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