def request_cmd(byteId, value):
"""
Requests the parsing of a command on the arduino side.
The request is sent via serial-connection to arduino with a
custom message protocol.
"""
# setup protocol bytes
start_byte = 0x11
cmd_byte = byteId
if value == -1:
parameter_byte = 255 # 255 = no parameter
else:
parameter_byte = value
check_byte = cmd_byte ^ parameter_byte
end_byte = 0x22
# setup message with bytes
message = [
start_byte, start_byte, start_byte,
cmd_byte,
parameter_byte,
check_byte,
end_byte, end_byte, end_byte
]
# send package
try:
tty = serial.Serial(port=Config.get_tty_port(), baudrate=57600)
tty.write(message)
print("Request Command wrote to Serial: {0}".format(message))
except Exception as e:
print("Request Command serial Exception: {0}".format(e))
def run(self):
connection = serial.Serial(port=Config.get_tty_port(), baudrate=57600)
while True:
# listen for bridge-commands
try:
line = connection.readline()
if line:
print(line)
self.add_data(line)
except Exception as e:
# print exception and let Thread sleep
print("Data-Thread Error: {}".format(e))
time.sleep(self.socket_timeout)
