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July 22, 2017 04:34
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Adafruit Feather M0 LoRa, Basic RX & TX example, Receiver example code, source: https://learn.adafruit.com/adafruit-feather-m0-radio-with-lora-radio-module/using-the-rfm-9x-radio#
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// Feather9x_RX | |
// -*- mode: C++ -*- | |
// Example sketch showing how to create a simple messaging client (receiver) | |
// with the RH_RF95 class. RH_RF95 class does not provide for addressing or | |
// reliability, so you should only use RH_RF95 if you do not need the higher | |
// level messaging abilities. | |
// It is designed to work with the other example Feather9x_TX | |
#include <SPI.h> | |
#include <RH_RF95.h> | |
/* for feather32u4 | |
#define RFM95_CS 8 | |
#define RFM95_RST 4 | |
#define RFM95_INT 7 | |
*/ | |
/* for feather m0 */ | |
#define RFM95_CS 8 | |
#define RFM95_RST 4 | |
#define RFM95_INT 3 | |
/* for shield | |
#define RFM95_CS 10 | |
#define RFM95_RST 9 | |
#define RFM95_INT 7 | |
*/ | |
/* for ESP w/featherwing | |
#define RFM95_CS 2 // "E" | |
#define RFM95_RST 16 // "D" | |
#define RFM95_INT 15 // "B" | |
*/ | |
/* Feather 32u4 w/wing | |
#define RFM95_RST 11 // "A" | |
#define RFM95_CS 10 // "B" | |
#define RFM95_INT 2 // "SDA" (only SDA/SCL/RX/TX have IRQ!) | |
*/ | |
/* Feather m0 w/wing | |
#define RFM95_RST 11 // "A" | |
#define RFM95_CS 10 // "B" | |
#define RFM95_INT 6 // "D" | |
*/ | |
/* Teensy 3.x w/wing | |
#define RFM95_RST 9 // "A" | |
#define RFM95_CS 10 // "B" | |
#define RFM95_INT 4 // "C" | |
*/ | |
// Change to 434.0, 868.0 or 915.0 Mhz; frequency must match RX's freq! | |
#define RF95_FREQ 868.0 | |
// Singleton instance of the radio driver | |
RH_RF95 rf95(RFM95_CS, RFM95_INT); | |
// Blinky on receipt | |
#define LED 13 | |
void setup() | |
{ | |
pinMode(LED, OUTPUT); | |
pinMode(RFM95_RST, OUTPUT); | |
digitalWrite(RFM95_RST, HIGH); | |
while (!Serial); | |
Serial.begin(9600); | |
delay(100); | |
Serial.println("Feather LoRa RX Test!"); | |
// manual reset | |
digitalWrite(RFM95_RST, LOW); | |
delay(10); | |
digitalWrite(RFM95_RST, HIGH); | |
delay(10); | |
while (!rf95.init()) { | |
Serial.println("LoRa radio init failed"); | |
while (1); | |
} | |
Serial.println("LoRa radio init OK!"); | |
// Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM | |
if (!rf95.setFrequency(RF95_FREQ)) { | |
Serial.println("setFrequency failed"); | |
while (1); | |
} | |
Serial.print("Set Freq to: "); Serial.println(RF95_FREQ); | |
// Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on | |
// The default transmitter power is 13dBm, using PA_BOOST. | |
// If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then | |
// you can set transmitter powers from 5 to 23 dBm: | |
rf95.setTxPower(23, false); | |
} | |
void loop() | |
{ | |
if (rf95.available()) | |
{ | |
// Should be a message for us now | |
uint8_t buf[RH_RF95_MAX_MESSAGE_LEN]; | |
uint8_t len = sizeof(buf); | |
if (rf95.recv(buf, &len)) | |
{ | |
digitalWrite(LED, HIGH); | |
RH_RF95::printBuffer("Received: ", buf, len); | |
Serial.print("Got: "); | |
Serial.println((char*)buf); | |
Serial.print("RSSI: "); | |
Serial.println(rf95.lastRssi(), DEC); | |
delay(10); | |
// Send a reply | |
delay(200); // may or may not be needed | |
uint8_t data[] = "And hello back to you"; | |
rf95.send(data, sizeof(data)); | |
rf95.waitPacketSent(); | |
Serial.println("Sent a reply"); | |
digitalWrite(LED, LOW); | |
} | |
else | |
{ | |
Serial.println("Receive failed"); | |
} | |
} | |
} |
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