def ser_open():
try:
ser_1.open()
channel.listener_connection(ser_1.isOpen())
except Exception as e:
print("error open serial port: " + str(e))
exit()
def ser_read(ser=ser_1):
global priem
global frames
global read_delay
if ser.isOpen():
if priem == 0:
channel.listener_user_connection(ser.dsr)
channel.listener_connection(ser_1.isOpen())
print('ser_read top', ser_1.isOpen(), ser_1.dsr)
#print(ser.cts, ser.dsr, ser.ri, ser.cd)
if ser.in_waiting == 0 and priem == 1:
priem = 0
read_delay = 0.5
channel.receive(frames)
frames = []
while ser.in_waiting > 0:
if priem == 0:
priem = 1
read_delay = 0.0001
print('in_waiting', ser_1.in_waiting)
while ser.in_waiting >= 238:
response = ser.read(238)
#print('READ', ser_2.in_waiting, datetime.datetime.now())
frames.append(response)
else:
channel.listener_connection(ser_1.isOpen())
channel.listener_user_connection(False)
print("cannot open serial port, read", ser_1.isOpen())
return 1
threading.Timer(read_delay, ser_read).start()
def ser_write(binary_message):
ser_1.flushInput() # flush input buffer, discarding all its contents
ser_1.flushOutput() # flush output buffer, aborting current output
channel.listener_connection(ser_1.isOpen())
channel.listener_user_connection(ser_1.dsr)
print('ser_write top', ser_1.isOpen(), ser_1.dsr)
if ser_1.isOpen() and ser_1.dsr and ser_1.cts:
for frame in binary_message:
try:
ser_1.write(frame)
#print('WRITE', i, datetime.datetime.now())
ser_1.flush()
except Exception as e1:
if not ser_1.cts:
channel.listener_transmission_failed()
print("error communicating write...: " + str(e1))
elif ser_1.isOpen() and not ser_1.cts:
channel.listener_transmission_failed()
else:
channel.listener_connection(ser_1.isOpen())
channel.listener_user_connection(ser_1.dsr)
print("cannot open serial port, write", ser_1.isOpen(), ser_1.dsr)