Il giorno sabato 1 novembre 2014 16:04:06 UTC+1, Dario ha scritto:
> BUT.. plot twist: in Windows XP, the very same python code and usb adapter
> are working just right (python 2.7 and pySerial 2.7). Also with c#, no issues.
I compared the behaviour of mono and python (2.7 and 3.3) on the same hw and
os, I guess something is wrong with pySerial implementation...
Mono code on Mint:
----
SerialPort s = new SerialPort("/dev/ttyUSB0", 19200, Parity.None, 8,
StopBits.One);
s.Open();
s.Write("sw o01 +\r");
while (true)
Console.Write(Convert.ToChar(s.ReadByte()));
----
Device reacts correctly and I get back what I expect (the first line is because
I sent the command via com port, the second is because I pushed a button on the
device):
dario@ivymint ~ $ sudo ./Test1.exe
sw o01 + Command OK
Button 1 pushed
Now equivalent Python 3.3 code on Mint:
---
import serial
s = serial.serial_for_url('/dev/ttyUSB0', 19200, bytesize = 8, parity = 'N',
stopbits = 1)
s.close()
s.open()
s.write(bytearray('sw o01 +\r','ascii'))
while True:
print(s.read())
---
In this case, I don't receive anything for my command, and when I press I
receive garbage instead of "Button 1 pushed"
dario@ivymint ~ $ sudo python3 ./test2.py
b'\xfc'
b'\x8f'
b'\r'
b'\x85'
b'1'
b'+'
b'\xfe'
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