here is some documentation about the values in /statistics: http://owfs.sourceforge.net/statistics.html
I do not know if there is more about that within the owfs project... there should be more at Maxim's website about the interface protocol which owfs is based upon. On 08.08.20 19:07, Mick Sulley wrote: > > I have just run it again, sleep for 3 seconds after the > simultaneous/temperature write and sleep 25 seconds at the end of the > loop. Presence is at 120 and I see a delay every 130 seconds or so. > The delay is on reading whichever parameter is first, so if I read > present first then that is the 0.7 scan, the other parameters are < > 0.1, but If I read type first then that is 0.7 sec, etc > > I am also reading CR16_errors and CR16_tries, these are the same and > both increase by 8 each loop. Is that normal? Is there any > documentation on this stuff, I can't find anything. > > Mick > > On 08/08/2020 08:46, Martin Patzak wrote: >> Thanks Mick, great summary. >> >> Let me add to 4), that you only see the 0.7 sec delay, because you >> read in a busy loop. >> I read only every 30 seconds and I never see a delay. >> >> But timing your reads is a good practice because this way you catch >> retries and maybe bus or sensor problems. >> Additionally you can have a look in /statistics for retries and errors >> >> On 08.08.20 01:04, Mick Sulley wrote: >>> Update on test findings. Test setup was 19 - DS18B20 temperature, 2 >>> - DS2413 IO and 1 - DS2437 Voltage, Raspberry Pi4 with Sheepwalk >>> RPi3 Adapter >>> >>> 1) /simultaneous/temperature does work, best to read latesttemp. >>> >>> 2) /settings/timeout/presence cannot be set or read via the owhttpd >>> web page, you must use owwrite & owread >>> >>> 3) Reading values (after setting simultaneous) normally takes < 0.1 >>> seconds >>> >>> 4) After the /settings/timeout/presence interval the next read for >>> every device will take around 0.7 seconds. Note if you read >>> multiple fields it is only the first one which takes the increased >>> time. >>> >>> 5) The increased time after /settings/timeout/presence interval >>> applies to all devices, not just temperature >>> >>> >>> Mick >>
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