> It is a little ironic that in the owfs suite of programs the module > called owfs it the only one you really should not use. yes, I second that. That was confusing to hear in the beginning. If felt so intuitive... Maybe it should not be part of the standard package at all?
> With Python3 the value ina write MUST be a byte value, hence b'0' in > that line, Python2 didn't seem to care, that threw me for a while. Good point! 👍 On 24.08.20 20:48, Mick Sulley wrote: > > Yes I would second that. It is a little ironic that in the owfs > suite of programs the module called owfs it the only one you really > should not use. Basically hte best way is to run owserver which talks > to all the devices, and then your python code talks to owserver. > > I have been using pyownet since I dropped fuse, it really is very > good, documentation here https://pyownet.readthedocs.io/en/latest/ > > With python3 you need something like this - > > import pyownet > > DevAddress = 'enter your device address here' > owp = pyownet.protocol.proxy(persistent=True) > owp.write('/DevAddress/PIO.BYTE',b'0') > print('PIO.BYTE = ', owp.read('/uncached/DevAddress/PIO.BYTE') > print('sensed.BYTE = ', owp.read('/uncached/DevAddress/sensed.BYTE') > > With Python3 the value ina write MUST be a byte value, hence b'0' in > that line, Python2 didn't seem to care, that threw me for a while. > > Also from command line you can use the commands from ow-shell, so > owdir lists all devices, owread 28.A59F9D0B0000/latesttemp reads the > value from that device. > > Hope that helps. > > Mick > > > On 24/08/2020 16:47, 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. >> >> On 24.08.20 15:57, Dennis Putnam wrote: >>> I have the following python 3 code: >>> >>> *fn='/mnt/1wire/3A.'+blower.id_+'/PIO.BYTE'** >>> **with open(fn,'wb') as fh:** >>> ** fh.write(onOff.to_bytes(1,byteorder=sys.byteorder)) >>> >>> *This produces the error: >>> >>> *OSError: [Errno 22] Invalid argument >>> >>> *The value of onOff will be either 1 or 0. In this particular case >>> the value is 1. The value of blower.id_ is 0BE14D000000. This is >>> what that OWFS directory contains: >>> >>> *ls -l /mnt/1wire/3A.0BE14D000000* >>> total 0 >>> -r--r--r-- 1 root root 16 Aug 19 21:17 address >>> -rw-rw-rw- 1 root root 256 Aug 19 21:17 alias >>> -r--r--r-- 1 root root 2 Aug 19 21:17 crc8 >>> -r--r--r-- 1 root root 2 Aug 19 21:17 family >>> -r--r--r-- 1 root root 12 Aug 19 21:17 id >>> -r--r--r-- 1 root root 16 Aug 19 21:17 locator >>> -rw-rw-rw- 1 root root 1 Aug 19 21:17 PIO.A >>> -rw-rw-rw- 1 root root 3 Aug 19 21:17 PIO.ALL >>> -rw-rw-rw- 1 root root 1 Aug 19 21:17 PIO.B >>> -rw-rw-rw- 1 root root 12 Aug 19 21:17 PIO.BYTE >>> -r--r--r-- 1 root root 16 Aug 19 21:17 r_address >>> -r--r--r-- 1 root root 12 Aug 19 21:17 r_id >>> -r--r--r-- 1 root root 16 Aug 19 21:17 r_locator >>> -r--r--r-- 1 root root 1 Aug 19 21:17 sensed.A >>> -r--r--r-- 1 root root 3 Aug 19 21:17 sensed.ALL >>> -r--r--r-- 1 root root 1 Aug 19 21:17 sensed.B >>> -r--r--r-- 1 root root 12 Aug 19 21:17 sensed.BYTE >>> -r--r--r-- 1 root root 32 Aug 19 21:17 type >>> >>> I cannot see anything wrong with the code or permissions and the >>> error is so generic I don't know to what it refers. Can someone spot >>> what is invalid or help me debug this problem? TIA. >>> >>> >>> _______________________________________________ >>> Owfs-developers mailing list >>> Owfs-developers@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers
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