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95 lines
2.4 KiB
95 lines
2.4 KiB
1 year ago
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// Feather9x_RX
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// -*- mode: C++ -*-
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// Example sketch showing how to create a simple messaging client (receiver)
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// with the RH_RF95 class. RH_RF95 class does not provide for addressing or
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// reliability, so you should only use RH_RF95 if you do not need the higher
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// level messaging abilities.
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// It is designed to work with the other example Feather9x_TX
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#include <SPI.h>
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#include <RH_RF95.h>
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#define RFM95_CS 8
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#define RFM95_RST 4
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#define RFM95_INT 3
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// Change to 434.0 or other frequency, must match RX's freq!
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#define RF95_FREQ 900.0
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// Singleton instance of the radio driver
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RH_RF95 rf95(RFM95_CS, RFM95_INT);
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// Blinky on receipt
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#define LED 13
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void setup()
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{
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pinMode(LED, OUTPUT);
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pinMode(RFM95_RST, OUTPUT);
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digitalWrite(RFM95_RST, HIGH);
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Serial.begin(115200);
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delay(1000);
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Serial.println("Feather LoRa RX Test!");
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// manual reset
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digitalWrite(RFM95_RST, LOW);
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delay(10);
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digitalWrite(RFM95_RST, HIGH);
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delay(10);
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while (!rf95.init()) {
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Serial.println("LoRa radio init failed");
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Serial.println("Uncomment '#define SERIAL_DEBUG' in RH_RF95.cpp for detailed debug info");
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while (1);
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}
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Serial.println("LoRa radio init OK!");
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// Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM
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if (!rf95.setFrequency(RF95_FREQ)) {
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Serial.println("setFrequency failed");
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while (1);
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}
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Serial.print("Set Freq to: "); Serial.println(RF95_FREQ);
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// Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on
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// The default transmitter power is 13dBm, using PA_BOOST.
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// If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then
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// you can set transmitter powers from 5 to 23 dBm:
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//rf95.setTxPower(23, false);
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}
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void loop()
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{
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if (rf95.available())
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{
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// Should be a message for us now
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uint8_t buf[RH_RF95_MAX_MESSAGE_LEN];
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uint8_t len = sizeof(buf);
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if (rf95.recv(buf, &len))
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{
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digitalWrite(LED, HIGH);
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RH_RF95::printBuffer("Received: ", buf, len);
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Serial.print("Got: ");
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Serial.println((char*)buf);
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Serial.print("RSSI: ");
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Serial.println(rf95.lastRssi(), DEC);
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// Send a reply
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uint8_t data[] = "And hello back to you";
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rf95.send(data, sizeof(data));
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rf95.waitPacketSent();
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Serial.println("Sent a reply");
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digitalWrite(LED, LOW);
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}
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else
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{
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Serial.println("Receive failed");
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}
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}
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}
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