Any library for Dorji LoRa DRF1278DM?

Projects Programming
1

Hi,

I am working with two LoRa modules, one as a sender and one as receiver. Sender (a SX1278 board) with ESP32 works fine, but Receiver (DRF1278DM by Dorji) with ESP8266 NodeMCU board is giving me problems.
I used Sandeep Mistry's library for the first one but I dont know if it would work for DRF1278DM as pins are different.
Connection:

ESP8266 D1 -> DRF1278DM RXD
ESP8266 D2 -> DRF1278DM TXD
ESP8266 3V3 -> DRF1278DM VCC
ESP8266 GND -> DRF1278DM GND

EN of the LoRa module is shorted with its own GND.

Code:

#include <SoftwareSerial.h>
#include <ESP8266WiFi.h>
SoftwareSerial ss(4, 5);

void setup() {
Serial.begin(9600); 
ss.begin(9600);
delay(5000); 
updateSerial();
}
void loop() {
ss.write("0xAF");
updateSerial();
ss.write("0xAF");
updateSerial();
ss.write("0x00");
updateSerial();
ss.write("0xAF");
updateSerial();
ss.write("0x00");
updateSerial();
ss.write("0x80");
updateSerial();
ss.write("0x03");
updateSerial();
ss.write("0x02");
updateSerial();
ss.write("0x00");
updateSerial();
ss.write("0x00");
updateSerial();
ss.write("0x92");
updateSerial();
ss.write("0x0D");
updateSerial();
ss.write("0x0A");
updateSerial();
delay(5000);
}
void updateSerial() {
  delay(500);
  while (Serial.available()) {
    ss.write(Serial.read());  
  }
  while (ss.available()) {
    Serial.write(ss.read());  
  }
}

It returns nothing even though as per manual (http://www.dorji.com/docs/data/DRF1278DM.pdf) it was supposed to return a string.
ss.available is always -1.

Red light on the LoRa module blinks 13 times after every 5 seconds. Once for each 'ss.write' above.

Is there a separate library for this? Does anybody know? The internet is really short on any work on this particular Data Radio Modem.

Thanks in advance.

2

That is a UART front ended module.

You will find it heaps and heaps easier if the transmitter and sender LoRa devices are of the same type so they can use the same library.

1 Like
3

Yes but this one has got a much more powerful antenna, so I was hoping to hook it up on the sender side and the SX1278 board on receiving side. Right now its the opposite (i.e. this module is the receiver) but I just cannot work out how to use this. The information provided is too little.

4

If you cannot find a library for the DRF1278DM you will have to study the datasheet and work it out, good luck with that.

A simple bit of wire for an antenna will surfice for most LoRa applications and fitting more 'powerfull' antennas than that is illegal in a lot of places.

5

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