Many thanks, nice work. I’m also interested in the hardware, especially which pressure sensor you’re using and the distances from the river to your WeeWx install and network.
> On 7 Jul, 2020, at 00:35, Graham Eddy <[email protected]> wrote: > > happy to share. haven’t put in github because (a) i need to learn git; and > (b) controller i use is now obsolete (but is a useful example). copy of data > service code attached > > i have an ‘aquagauge' controller with serial interface to host and wireless > connections to up to 8 sensors. i am using just one sensor at present, a > pressure sensor secured to river bottom that is connected to a box that > converts water column pressure to water depth with wireless transmitter to > the controller (in principle much the same as ultrasonic sensor fixed above > river measuring distance to water) > > it follows the weewx acquisition data service pattern: > external port (interface to controller) firewalled on other side of a thread > to protect main weewx thread > service starts by spawning acquisition thread and then binding a callback > from weewx for arriving LOOP packets > acquisition thread opens port and loops through reading measurements from > port and putting them on a queue > callback gets any measurements from queue and writes them into current LOOP > packet > i could have jammed the measurements into an existing data_type in LOOP > packet (e.g. ‘soilMoist3’) and interpreted that data_type downstream (e.g. > soilMoist3 graph has label River Level) but instead i created a new data_type > ‘riverLevel’ (i.e. a new database column) > > some interesting design considerations: > open/read failure on port - robustly retry? when to give up, and what to do > then? > multiple measurements waiting on queue - take last? average them? > sensor measurement range - accurately covers [min,max]? > g-eddy > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/638DA29F-AFC3-431E-8743-518ED26D4899%40gmail.com > > <https://groups.google.com/d/msgid/weewx-user/638DA29F-AFC3-431E-8743-518ED26D4899%40gmail.com?utm_medium=email&utm_source=footer>. > <aqua.py> > >> On 7 Jul 2020, at 10:29 am, weather list <[email protected] >> <mailto:[email protected]>> wrote: >> >> I’d be very interested in the details of your setup for the depth sensor if >> you’re willing to share. >> >>> On 5 Jul, 2020, at 23:16, Graham Eddy <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> i have added external river depth sensor (pressure not ultrasonic but same >>> principle) - wrote a data service that inserts its readings into weewx loop >>> records; defined new database column for it to persist. >>> g-eddy >>> >>>> On 6 Jul 2020, at 9:25 am, Wes Witt <[email protected] >>>> <mailto:[email protected]>> wrote: >>>> >>>> Is there an extension for adding snow data to weewx? i'm considering >>>> adding an ultrasonic sensor to my weather station which would provide snow >>>> depth data. how have people implemented this before? just add a database >>>> field for snowdepth? what about snowrate? >>>> >>>> just thinking that i may not need to reinvent the wheel if someone has >>>> already done this. >>>> >>>> -Wes > > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/638DA29F-AFC3-431E-8743-518ED26D4899%40gmail.com > > <https://groups.google.com/d/msgid/weewx-user/638DA29F-AFC3-431E-8743-518ED26D4899%40gmail.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/173ABA34-309B-4D89-A8A5-7C2C4CEC14D3%40gmail.com.
