Thank you Stefano On 06.08.20 16:19, Stefano Miccoli via Owfs-developers wrote: > I agree that using the “persistent” network object for the present use > case could speed up things, see > <https://pyownet.readthedocs.io/en/latest/protocol.html#persistent-vs-non-persistent-proxy-objects> > > > However the correct call to obtain a persistent object is > > owp = pyownet.protocol.proxy(persistent=True) > > Stefano > > > PS > > In the example code provided there is no need to close the connection, > but the typical usage pattern is > > with owp: > # loop reading sensors, persistent connection is open > # do some work, persistent connection is closed > > which ensures that the persistent connection is closed upon exit of > the `with` block and does not remain open when the program is not > querying owserver. > > E.g. > > def main(): > sen_lst = [ > "Solar_Pnl_1A", > "Solar_Pnl_2A", > "Solar_Pnl_1B", > "Pool_Sol_X", > "Pool_CH_X", > "DHW_Mid_Top", > "DHW_Mid_Btm", > "DHW_Top", > "Temp5", > "Temp19", > "Temp20", > "Temp21", > "Temp22", > "Temp23", > "Temp25", > "Temp26", > "Temp27", > "Temp29", > "Temp30", > ] > prop_lst = ["/type", "/power", "/latesttemp"] > owp = pyownet.protocol.proxy(persistent=True) > while True: > start = time.time() > with owp: > # persistent socket is open! > owp.write("/simultaneous/temperature", b"1") > time.sleep(1) > print("start of sensor_read.py") > for p in prop_lst: > print("%s " % p, end="") > print("") > for sen in sen_lst: > print("\n%s " % sen, end="") > for prop in prop_lst: > try: > print( > "%s " % (owp.read("/uncached/" + sen + > prop).decode()), end="" > ) > except: > print("failed! ", end="") > endt = time.time() - start > print("\nTime = %f" % endt) > # out of with block persistent socket is closed > sleep(30) # do some other work, and then start again > > >> On 6 Aug 2020, at 13:31, Martin Patzak <martin.pat...@gmx.de >> <mailto:martin.pat...@gmx.de>> wrote: >> >> I read the CRC16 attribute from /statistics >> >> /CRC16_error = op.read('/statistics/errors/CRC16_errors')/ >> >> where op is the persistent(!) /pyownet/ object, created like this: >> >> / from pyownet import protocol// >> // >> // op = protocol.proxy(server,port=port)/ >> >> On 06.08.20 11:23, Mick Sulley wrote: >>> >>> OK I will log read times and see what that shows. >>> >>> You say 'I also log if the error of the 1wire bus changes.' how do >>> you do that? >>> >>> No I don't really need to read that fast, this is just a test setup >>> to get a better understanding so I can hopefully fine tune my main >>> system. >>> >>> There should not be anything else running. I just tried running top >>> at the same time, I monitored it at the point of the slow scan and >>> didn't see anything else significant. >>> >>> Mick >>> >>> On 06/08/2020 09:06, Martin Patzak wrote: >>>> It looks like your timing has improved after all! >>>> >>>> in your original Python-code you could time every read for each sensor. >>>> I have also powered sensors and a read is usually faster than 0.1 >>>> seconds. >>>> I log in a file if the read took longer than 0.3 seconds, which is >>>> almost never the case. >>>> I also log in the file if the whole reading loop took longer than 3 >>>> seconds, which again is almost never the case. >>>> >>>> I also log if the error of the 1wire bus changes. >>>> >>>> I read 25 sensors every full and every half minute, so maybe you >>>> could implement a delay as well and see if things get more consistent. >>>> Do you need to read so fast in a loop for you application? >>>> >>>> What else is running on your machine? You could run top in parallel >>>> to your python loop. >>>> >>>> >>> >>> >>> _______________________________________________ >>> 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 >> <mailto: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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