Python 2.7.6 on Mint, pySerial 2.6
I'm trying to write a console app to control a certain device via a usb com
port.
In miniterm (-p /dev/ttyUSB0 -e -b 19200), I can communicate correctly with
this configuration:
--- Settings: /dev/ttyUSB0 19200,8,N,1
--- RTS: inactive DTR: inactive BREAK: inactive
--- CTS: inactive DSR: inactive RI: inactive CD: inactive
--- software flow control: inactive
--- hardware flow control: inactive
--- data escaping: raw linefeed: CR
sw o01 + <--- I send this
sw o01 + Command OK <--- device does what it should *and* I receive this
Now my code:
----
import serial
s = serial.serial_for_url(
'/dev/ttyUSB0',
19200,
bytesize = 8,
parity = 'N',
stopbits = 1,
rtscts = False,
dsrdtr = False,
xonxoff = False,
timeout = 1 # tried without
)
s.close() # tried without
s.open()
s.write('sw o01 +\r')
s.flush() # tried without
s.close() # tried with a sleep before close
----
With this I don't receive anything (tried with readline etc, omitted for
readability), and the device doesn't react. Also, if I connect again with
miniterm and issue the command, I first receive a "wrong command" message, as
if some garbage was actually sent by my app, then it works again.
Isn't my config equivalent to the one in miniterm? Anything missing?
Thanks
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