import serial
import struct
from base64 import encode

# open serial port
#ser = serial.Serial('/dev/ttyS2', 9600, timeout=1)
ser = serial.Serial(
            '/dev/ttyS2',
            baudrate=9600,
            bytesize=8,
            timeout=1,
            stopbits=serial.STOPBITS_ONE,
            parity=serial.PARITY_NONE
        )
# configure RS485 settings
command = [1, 4, 0, 1, 0, 2, 32, 11]
data = bytearray(command)

# ser.setRTS(False)
ser.write(data)
#ser.setDTR(True)
#ser.write(b'\x01\x04\x00\x01\x00\x02\x20\x0B')
ser.flush()
# ser.setRTS(True)
#ser.setDTR(False)

# read response
response = ser.read(9)
# temperature = response[3] + response[4]
# humidity = response[5] + response[6]

# (temp,) = struct.unpack(">h", temperature)
# print("temperature " + str(temp))
# (humi,) = struct.unpack(">h", humidity)
# print("humidity " + str(humi))
print("Temp and Humid Read.")

# print response
print(response)

# close serial port
ser.close()