Hi all,
I am trying to use the RFM95W chipset from adafruit with my nRF52832 feather. However, I am experiencing problems initializing the chipset and communicating with it (I am using the RadioHead library). I have previously tried the LoRa chipset with the SAMD21 feather (sans LoRa), and it worked fine. This problem may be due to a couple of issues:
- wrong pins being used on the feather
- SPI library integration
The pins I am currently using:
SCK, MOSI, and MISO between LoRa and feather
RST- pin 7
CS - pin 11
INT - pin 31
After further debugging, I have found that the processor hangs when spiRead(RH_RF95_REG_01_OP_MODE) is called in rf95.init(). Full code below:
Hi all,
I am trying to use the RFM95W chipset from adafruit with my nRF52832 feather. However, I am experiencing problems initializing the chipset and communicating with it (I am using the RadioHead library). I have previously tried the LoRa chipset with the SAMD21 feather (sans LoRa), and it worked fine. This problem may be due to a couple of issues:
- wrong pins being used on the feather
- SPI library integration
The pins I am currently using:
SCK, MOSI, and MISO between LoRa and feather
RST- pin 7
CS - pin 11
INT - pin 31
After further debugging, I have found that the processor hangs when spiRead(RH_RF95_REG_01_OP_MODE) is called in rf95.init(). Full code below:
[code]// Feather9x_TX
// -*- mode: C++ -*-
// Example sketch showing how to create a simple messaging client (transmitter)
// 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_RX
//#include <SPI.h>
#include <RH_RF95.h>
/*
#if defined(ARDUINO_SAMD_ZERO) && defined(SERIAL_PORT_USBVIRTUAL)
// Required for Serial on Zero based boards
#define Serial SERIAL_PORT_USBVIRTUAL
#endif*/
#define RFM95_RST 7
#define RFM95_CS 11
#define RFM95_INT 31
// Change to 434.0 or other frequency, must match RX's freq!
#define RF95_FREQ 915.0
// Singleton instance of the radio driver
RH_RF95 rf95(RFM95_CS, RFM95_INT);
void setup()
{
pinMode(RFM95_RST, OUTPUT);
digitalWrite(RFM95_RST, HIGH);
Serial.begin(115200);
delay(100);
Serial.println("LoRa TX Test!");
// manual reset
digitalWrite(RFM95_RST, LOW);
delay(10);
digitalWrite(RFM95_RST, HIGH);
delay(10);
while (!rf95.init()) {
Serial.println("LoRa radio init failed");
Serial.println("Uncomment '#define SERIAL_DEBUG' in RH_RF95.cpp for detailed debug info");
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);
}
int16_t packetnum = 0; // packet counter, we increment per xmission
void loop()
{
delay(1000); // Wait 1 second between transmits, could also 'sleep' here!
Serial.println("Transmitting..."); // Send a message to rf95_server
char radiopacket[20] = "Hello World # ";
itoa(packetnum++, radiopacket+13, 10);
Serial.print("Sending "); Serial.println(radiopacket);
radiopacket[19] = 0;
Serial.println("Sending...");
delay(10);
rf95.send((uint8_t *)radiopacket, 20);
Serial.println("Waiting for packet to complete...");
delay(10);
rf95.waitPacketSent();
// Now wait for a reply
uint8_t buf[RH_RF95_MAX_MESSAGE_LEN];
uint8_t len = sizeof(buf);
Serial.println("Waiting for reply...");
if (rf95.waitAvailableTimeout(1000))
{
// Should be a reply message for us now
if (rf95.recv(buf, &len))
{
Serial.print("Got reply: ");
Serial.println((char*)buf);
Serial.print("RSSI: ");
Serial.println(rf95.lastRssi(), DEC);
}
else
{
Serial.println("Receive failed");
}
}
else
{
Serial.println("No reply, is there a listener around?");
}
}
Thank you very much!
