A statement like this: Leads me to think you were implying the relay state could impact stability.

Good morning, Status of this morning : There are still reboots, even with the the relays HIGH (i.e. no 220 V AC current transiting the output terminals of the relay). Let me make it clearer :

If you're saying switching mains (or even the act of switching relays) is crashing the system go back to my first post in reply to this. Interference: EMI RF Back EMF.(flyback from relay coils.) High

When the relays are HIGH (220 V AC in Open Circuit at the relay ouput terminals) the system is stable : no reboot in more than 88 minutes). See screen copy : I let it in this state for the night and

What about that I2C bus... Bus and all sensors are 5V rated/compatible? Level translation for 3V3? Loading resistors? Twisted pair? How long?

I would tackle problems one at a time... Get the rain sensor working first, that should be a basic device right?

Or perhaps corrupt signaling on the I2C bus locks up the (Arduino) Wire library.

The OCS reads the "Chart.js" file and sends it to your web browser to run. I commented on the likely causes already. I just started from scratch here in that last go around, my development laptop

Not really, it seems to be a sensors problem, perhaps down in the libraries. What libraries has not been discussed.

Hello everybody Thanks Howard for your efforts: I downloaded the latest OCS version 2.33, and set it up for my observatory with my basic configuration in config.h with no Weather function : OK as 1.

Thank you for the update. I'm using python for distant request on OCS with these commands and it's very nice. You did a very great job

I patched those issues (version 2.33 now.)

Ok that did it, the lights went on... That 1 should be a 0. There were other cases too, fixed now. It worked for me by chance, the string happened to have a 0 at position 1 which isn't a sure thing

I just uploaded/tested the latest version (github) to take care of Koal01's issue, no surprise it came right up without issue. Note that 2.31 and 2.32 are for our purposes identical and I did testing

I changed these lines in command.ino this way to get the temperature value through a ":Ga#" request and it is working now #if WEATHER_TEMPERATURE == ON && WEATHER == ON // :G1# Get outside

Same function called for the weather panel as the command... so how that could happen IDK. Works here with BME280 too. I added it a new command :GQ# to get the sky quality.

Sorry Howard, I should not have gone so quick, I have to amend the picture... Soon after having sent this last message, I realized that the Web page displayed on my screen was in fact frozen... No

Last update for today @ 16:30 h UT: Good point for me : I think I have found the cause of the instabilities and cured them. Bad point for you Howard : It seems to be the latest version of OCS

Sorry I was wrong in my last post : the Basic configuration that is OK and perfectly stable is with OCS version 2.1c. I did'nt update it because it is operating perfectly.

Update of 18th of April 2021: Starting point : OCS version 2.31. Basic configuration : Roof control function + Power relays control function. Operates perfectly in particular the relays operate