pyserial sending unicode string as a byte array

Question

I'm doing some arduino project that sends and receives strings.

It sends me a string, which is a comma separated list of numbers which i save to file. I then try to read the file and send the string back in the same way i received it.

This works fine if I do this through the arduino serial monitor, yet I can't seem to get pyserial to send/encode the string in the same way it was received.

I've tried using code like this:

for b in bytearray("10,20","UTF-8"):
    ser.write(str(b).encode("latin_1"))

ser.flush()

but haven't had any luck getting it sent through correctly.

Is this Python 2 or 3?

Paul
– Paul

2016-04-14 03:05:59 +00:00
Commented Apr 14, 2016 at 3:05 — Paul
– Paul, Commented Apr 14, 2016 at 3:05

SoreDakeNoKoto · Accepted Answer · 2016-04-14 04:45:10Z

2

Assuming you're using Python 3, you can simply use:

ser.write("10,20".encode())

For Python 2, I think strings can be passed directly to ser.write() without encoding them.

answered Apr 14, 2016 at 4:45

SoreDakeNoKoto

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SupaGu · Accepted Answer · 2016-04-16 01:01:47Z

2

What I ended up getting working was this:

ba = bytes("10,20\n", encoding="ascii")
ser.write(ba)

answered Apr 16, 2016 at 1:01

SupaGu

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