#!/usr/bin/python
# -*- coding:utf-8 -*-

import smbus
import time
from pca9534d import PCA9534D

address = 0x78
busNumber = 1

bus = smbus.SMBus(busNumber)

macPause = [0x6D, 0x61, 0x63, 0x20, 0x70, 0x61, 0x75, 0x73, 0x65, 0x0D, 0x0A] # Content: mac pause\r\n
str = ""

class expBoard:
    def __init__(self, addr, port):
        self.addr = addr
        self.bus = smbus.SMBus(port)
    def write_block_data(self, byte, array):
        self.bus.write_i2c_block_data(self.addr, byte, array)
    def write_data(self, value):
        self.bus.write_byte(self.addr, value)
    def read_data(self):
        self.bus.read_byte(self.addr)
    def read_nbytes_data(self, data, n):
        return self.bus.read_i2c_block_data(self.addr, data, n)


def main():
    pca9534d = PCA9534D(i2c_bus=1, device_address=0x20)
    pca9534d.set_rst_high() # set reset to HIGH value 

    i2c_bus = expBoard(address, busNumber)
    i2c_bus.write_data(123) # reset LoRa module
    time.sleep(0.7)

    i2c_bus.write_data(17) # set baudrate to 57600
    time.sleep(0.1)

    while True:
        print("---> {}".format(str.join(chr(n) for n in macPause)))
        i2c_bus.write_block_data(0x00, macPause) # write 'mac pause\r\n' to register 0
        time.sleep(0.7)

        rx = i2c_bus.read_nbytes_data(0x00, len("4294967245")+2) #from register 0, length of bytes requested: 12
        list = [chr(n) for n in rx]
        print(str.join(list)) # print rx as integer

if __name__ == "__main__":
    main()