import serial, subprocess, time

import busio
from digitalio import DigitalInOut, Direction, Pull
import board

from pyLoraRFM9x import LoRa, ModemConfig


addr = '/tmp/rfmtty'
addr_client = '/tmp/rfmtty_client'

cmd=['/usr/bin/socat','-d','-d','PTY,link=%s,raw,echo=0' %
        addr, 'PTY,link=%s,raw,echo=0' % addr_client]
socat_proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
time.sleep(1)

ser = serial.serial_for_url(addr)

def on_recv(payload):
        print(f'Received lora byte: {payload.message}')
        ser.write(payload.message)

lora_address = 2
lora = LoRa(1, 5, lora_address, reset_pin = 25, modem_config=ModemConfig.Bw125Cr45Sf128, tx_power=14, acks=True)
lora.on_recv = on_recv

while True:
    ser_data = bytearray()
    while ser.inWaiting() > 0 and len(ser_data) <= 248:
        recieved_byte = ser.read(1)
        ser_data += recieved_byte
    if ser_data == b'':
        pass
    else:
        print(f'Received serial data: {ser_data}')
        lora.send_to_wait(bytes(ser_data), 255, retries=2)

socat_proc.kill()