Yes, I was planning to use the WDT.

The OCS already has an option to reset itself automatically using the WDT if something hangs but that seems to have problems so we keep it turned off.  Just need to revisit it.

I forgot to add this one to about resetting the arduino.
http://blog.industrialshields.com/en/how-to-reset-a-plc-using-the-ethernet-shield/

That is the same website I was looking at. Lots of great info.
Nino

Sub Zero Temps( -16.9), still working great! 

Hi all
Interesting !
I recently ordered an ubstinyIsp (still waiting for it) from ebay to burn the bootloader, i also found this topic that seems helpful.
https://www.freetronics.com.au/pages/how-to-upload-a-sketch-to-your-arduino-via-a-network#.XkVl1GhKhPb
I was just intending to try but reading  this mention "From what I understand I'd have to add a control to the website to reset the Mega2560 to place it in firmware upload mode.  I suspect that would be easy". it seems that it is going to be really possible !

Thank you 

Nice skies
Koal01

On Wed, Feb 12, 2020 at 03:18 PM, Fernando Nino Sr wrote:

I will take a look at it, just wondering if that would be an option in the future.
Thanks

From what I understand I'd have to add a control to the website to reset the Mega2560 to place it in firmware upload mode.  I suspect that would be easy.

I was also looking at the WifIOTA and ArduinoOTA, it also mentions the ariadne-bootloader.  I will take a look at it, just wondering if that would be an option in the future.
Thanks
Nino

On Tue, Feb 11, 2020 at 12:00 PM, Fernando Nino Sr wrote:

Howard, how do you remote update the sketch to your OCS system?

In the usual way.  A PC attached to the Mega2560 USB connection.

There are TFTP bootloaders for the Mega2560.  I guess one could use that across IP (VPN, etc.) to flash the Mega2560 but I haven't gone down that path.  Nothing to do with the OCS and nothing stopping you except for the hassle AFAIK.

This isn't the only one but perhaps the most up to date?
https://github.com/loathingKernel/ariadne-bootloader

We are due for some cold weather this week, so I wanted to see how the setup will work. I still have to add the sensors but wanted to test out the main boards. I also worked on the relay outlets, I did not want to take the end plugs off so I switched to outlet plugs. Currently working on the sensor hut.
  
Howard, how do you remote update the sketch to your OCS system?

Thanks Nino