kopia lustrzana https://github.com/jgromes/RadioLib
111 wiersze
2.9 KiB
C++
111 wiersze
2.9 KiB
C++
/*
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RadioLib SX127x Blocking Receive Example
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This example listens for LoRa transmissions using SX127x Lora modules.
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To successfully receive data, the following settings have to be the same
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on both transmitter and receiver:
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- carrier frequency
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- bandwidth
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- spreading factor
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- coding rate
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- sync word
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- preamble length
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Other modules from SX127x/RFM9x family can also be used.
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Using blocking receive is not recommended, as it will lead
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to significant amount of timeouts, inefficient use of processor
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time and can some miss packets!
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Instead, interrupt receive is recommended.
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For default module settings, see the wiki page
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https://github.com/jgromes/RadioLib/wiki/Default-configuration#sx127xrfm9x---lora-modem
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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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// SX1278 has the following connections:
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// NSS pin: 10
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// DIO0 pin: 2
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// RESET pin: 9
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// DIO1 pin: 3
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SX1278 radio = new Module(10, 2, 9, 3);
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// or using RadioShield
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// https://github.com/jgromes/RadioShield
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//SX1278 radio = 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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int state = radio.begin();
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if (state == RADIOLIB_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] Waiting for incoming transmission ... "));
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// you can receive data as an Arduino String
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String str;
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int state = radio.receive(str);
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// you can also receive data as byte array
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/*
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byte byteArr[8];
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int state = radio.receive(byteArr, 8);
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*/
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if (state == RADIOLIB_ERR_NONE) {
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// packet was successfully received
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Serial.println(F("success!"));
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// print the data of the packet
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Serial.print(F("[SX1278] Data:\t\t\t"));
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Serial.println(str);
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// print the RSSI (Received Signal Strength Indicator)
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// of the last received packet
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Serial.print(F("[SX1278] RSSI:\t\t\t"));
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Serial.print(radio.getRSSI());
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Serial.println(F(" dBm"));
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// print the SNR (Signal-to-Noise Ratio)
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// of the last received packet
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Serial.print(F("[SX1278] SNR:\t\t\t"));
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Serial.print(radio.getSNR());
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Serial.println(F(" dB"));
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// print frequency error
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// of the last received packet
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Serial.print(F("[SX1278] Frequency error:\t"));
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Serial.print(radio.getFrequencyError());
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Serial.println(F(" Hz"));
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} else if (state == RADIOLIB_ERR_RX_TIMEOUT) {
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// timeout occurred while waiting for a packet
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Serial.println(F("timeout!"));
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} else if (state == RADIOLIB_ERR_CRC_MISMATCH) {
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// packet was received, but is malformed
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Serial.println(F("CRC error!"));
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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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}
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