Yes I have struggled with that as well. I have discovered how to do it,
but I don't really understand why.
The answer seems to be that to write a 1 you need
owproxy.write('device_id' + '/PIO.BYTE, b'1')
so you need to write the byte value of the string 1, not the byte value
of the integer 1. As I say, I don't understand why that is so, I dabble
with Python, I'm far from expert :)
Hope that helps
Mick
On 27/08/2020 15:18, Dennis Putnam wrote:
Hi Martin,
See embedded comments.
On 8/27/2020 2:56 AM, Martin Patzak wrote:
what does *onOff.to_bytes(1,byteorder=sys.byteorder)) *evaluate to?
Is that resulting in a byte-value? I am not familiar with this...
This seems to be the crux of the problem. After a lot of testing it
appears to be a python 3 issue converting an integer to a byte string.
I am convinced that passing a byte string to the write function is the
problem. Thanks for everyone's help but this is not an owfs problem.
Things you could try:
* In the path use the fully qualifying path and add */uncached *and
write a byte-value like this
*owproxy.write('/uncached/3A.0BE14D000000/PIO.BYTE',b'0')*
* writeto the individual outputs PIO.A or PIO.B directly
* try reading the sensed values***print('sensed.BYTE = ',
owp.read('/uncached/****3A.0BE14D000000**/sensed.BYTE')*
**
On 26.08.20 21:05, Dennis Putnam wrote:
I have rewritten my code to use pyownet but am now nearly back where
I started. I have the following code:
*owproxy.write('/3A.'+blower.id_+'/PIO.BYTE',onOff.to_bytes(1,byteorder=sys.byteorder))
*That statement gives me the following error:
*pyownet.protocol.OwnetError: [Errno 22] legacy - Invalid
transaction: '/3A.0BE14D000000/PIO.BYTE'
*The error is meaningless to me. The path is not wrong so is it
complaining about writing a single byte?
Thanks again.
On 8/24/2020 4:33 PM, Dennis Putnam wrote:
Thanks to everyone that replied. I was not aware of pyownet. I will
look into that and rewrite my code to use it.
On 8/24/2020 11:47 AM, Martin Patzak wrote:
For python I would highly recommend you use the library *pyownet
*by Stefano Miccoli
/https://github.com/miccoli/pyownet/
/using Fuse can lead to weird problems... (not saying that it is
the reason in your specific case)
or you can use the buil-in functions in owserver
owread/owwrite/owdir instead.
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