hass-opensprinkler: Logbook full of "unavailable" entries; log shows "Timeout fetching resource status"

First, let me say that I was very excited to find this Home Assistant integration!

A couple pieces of background info:

• Home Assistant 2021.7.2
• HACS 1.13.2
• hass-opensprinkler (installed via HACS) 1.1.6

I am running with OS hardware version 2.3, with firmware 2.1.7 (I had previously tried upgrading to 2.1.9(7) but ran in to weird issues where after a few minutes, API calls would starting returning “result:2” (unauthorized) which required me to run with the “Ignore Password” option. I also had multiple occurrences of the clock doing a “time warp” (even though I have NTP sync enabled) which resulted in a watering program running twice on the same day!! I eventually downgraded back to 2.1.7 and things are once again stable. I opened a ticket with OpenSprinkler about the weirdness I saw after upgrading to 2.1.9(7), but they had not heard of problems like what I described.)

I recently found this integration and successfully added it to my Home Assistant config. Everything seemed to be working great, but then I noticed my Logbook was full of “OpenSprinkler * became unavailable” followed 5 seconds later by “OpenSprinkler * turned [on|off]” entries.

I checked my Home Assistant log, and it’s full of messages like this:

2021-07-16 02:45:55 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 02:46:50 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 02:48:00 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 02:48:20 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 02:49:10 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 05:01:10 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 06:49:45 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 06:55:50 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 06:57:05 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 06:57:35 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data
2021-07-16 06:58:30 ERROR (MainThread) [custom_components.opensprinkler] Timeout fetching OpenSprinkler resource status data

Hoping to reproduce the problem, I’ve been running this loop (the pw hash is for the default) polling the “all” endpoint every 5 seconds:

while true; do date; curl -v 'http://sprinkler/ja?pw=a6d82bced638de3def1e9bbb4983225c'; echo; sleep 5; done

but have not seen any failures.

Any idea what might be causing the timeouts in HA? My first thought is that it could be related to needing to supply the controller’s MAC address when you’re not running 2.1.9(4) or later, so maybe it’s ARP-related. (I have not yet looked at the code to see why this is a requirement…)