def get_data_from_sensor(sensor_name):
FIFO_NAME = Pipes.FIFO_REQUEST
FIFO_NAME_ANSWER = Pipes.FIFO_ANSWER
my_answer_pipe = Pipes()
fifo_writer = os.open(FIFO_NAME, os.O_WRONLY)
ret_val = "NOK", 400
try:
my_answer_thread = Thread(target=my_answer_pipe.listening_pipe, args=(FIFO_NAME_ANSWER, ))
my_answer_thread.start()
message = create_msg(b"Hello sensor")
os.write(fifo_writer, message)
my_answer_thread.join()
my_answer_pipe.kill_all_threads()
ret_val = jsonify({"message": str(decode_value(my_answer_pipe.get_received_data()))})
except KeyboardInterrupt as kdb_ex:
print('Closing...')
finally:
os.close(fifo_writer)
return ret_val
from pipes import Pipes
from threading import Thread
from message_encoder import create_msg
from helper import read_temp_senzor1
import struct
if __name__ == '__main__':
FIFO_NAME = Pipes.FIFO_REQUEST
my_reader_pipe = Pipes()
while my_reader_pipe.killthreads is False:
try:
my_thread = Thread(target=my_reader_pipe.listening_pipe,
args=(FIFO_NAME, ))
my_thread.start()
my_thread.join()
print(my_reader_pipe.get_received_data())
writer_endpoint = my_reader_pipe.connect_to_pipe(Pipes.FIFO_ANSWER)
my_reader_pipe.write_to_pipe(
writer_endpoint,
message=create_msg(
bytearray(struct.pack('f', read_temp_senzor1()))))
except KeyboardInterrupt as kbd_ex:
print('Closing reader... ')
my_reader_pipe.kill_all_threads()
finally:
pass