RN2483 LoRa point to point test

rn2483_rx.py

#!/usr/bin/env python3

# RN2483 point to point test
# open serial link, init and display rx frames

import argparse
import serial

# some functions
def send_cmd(cmd):
    ser.write(bytes('%s\r\n' % cmd, 'ascii'))
    status_str = ser.readline().decode().rstrip()
    print('send command "%s" return "%s"' % (cmd, status_str))

def rx_frame():
    ser.write(bytes('radio rx 0\r\n', 'ascii'))
    ser.readline()
    return ser.readline().decode().rstrip()


# main program
if __name__ == '__main__':
    # parse argument
    parser = argparse.ArgumentParser(description='RN2483 receive')
    parser.add_argument('-d', '--device', type=str, default='/dev/ttyACM0',
                        help='serial device (default is "/dev/ttyACM0")')
    parser.add_argument('-b', '--baurate', type=int, default=57600,
                        help='serial baudrate')
    args = parser.parse_args()
    
    # open serial device
    ser = serial.Serial(args.device, args.baurate)

    # init RN2483
    print('\n----- init RN2483 -----\n')
    
    send_cmd('sys factoryRESET')
    send_cmd('sys reset')
    send_cmd('radio set mod lora')
    send_cmd('radio set freq 868100000')
    send_cmd('radio set pwr 14')
    send_cmd('radio set sf sf12')
    send_cmd('radio set afcbw 125')
    send_cmd('radio set rxbw 250')
    send_cmd('radio set fdev 5000')
    send_cmd('radio set prlen 8')
    send_cmd('radio set crc on')
    send_cmd('radio set cr 4/8')
    send_cmd('radio set wdt 0')
    send_cmd('radio set sync 12')
    send_cmd('radio set bw 250')
    send_cmd('mac pause')

    # receive frames
    print('\n------ rx frames ------\n')

    i = 0
    while True :
        i += 1
        rx_str = rx_frame()
        print('[frame #%04d] %s' % (i, rx_str))

rn2483_tx.ino

 /*
  The Things UNO (model: TTN-003-868-1.0) point to point sender
  
  Send an unsigned integer every 5s.
  Use it only for radio test (don't complain with radio regulation) !!!
  
  This example code is in the public domain.
*/


#define loraSerial Serial1
#define debugSerial Serial

// some vars
uint32_t i = 0;

// some functions
void send_cmd(String cmd) {
  debugSerial.println("send cmd: " + cmd);
  loraSerial.println(cmd);
  String str = loraSerial.readStringUntil('\n');
  debugSerial.println("return: " + str);
}

void send_uint(uint32_t value) {
  debugSerial.println("send value: " + String(value, HEX));
  loraSerial.println("radio tx " + String(value, HEX));
  String str = loraSerial.readStringUntil('\n');
  debugSerial.println("return: " + str);
  str = loraSerial.readStringUntil('\n');
  debugSerial.println("        " + str);
}


void setup() {
  // init serials
  debugSerial.begin(115200);
  loraSerial.begin(57600);
  
  // init lora chip
  debugSerial.println("init of RN2483 chip"); 
  send_cmd("sys factoryRESET");
  send_cmd("sys reset");
  send_cmd("radio set mod lora");
  send_cmd("radio set freq 868100000");
  send_cmd("radio set pwr 14");
  send_cmd("radio set sf sf12");
  send_cmd("radio set afcbw 125");
  send_cmd("radio set rxbw 250");
  send_cmd("radio set fdev 5000");
  send_cmd("radio set prlen 8");
  send_cmd("radio set crc on");
  send_cmd("radio set cr 4/8");
  send_cmd("radio set wdt 0");
  send_cmd("radio set sync 12");
  send_cmd("radio set bw 250");
  send_cmd("mac pause");
}

void loop() {
  // send integer
  send_uint(i++);

  // wait next loop
  delay(5000);
}