Monitoring a boiler with modbus and Datadog

jad3675

I just finished up installing a TT Instinct boiler with a TurboMax for DHW. Curious as to how the boiler was performing for DHW production, I came up with a little script to scrape data from the modbus interface on the boiler using a $12 usb-to-modbus interface from Amazon. Datadog is a free-ish cloud based monitoring product that can consume pretty much any type of data you throw at it.



Kinda neat - I started filling an 80 gallon tub to trigger the boiler. Even in the middle of the firing cycle, the hot water output never dropped below 115F at the spout. I have the TurboMax plumbed into a Caleffi Mixing vavle (set at 120F), with the TurboMax aquastat set at 175F (I think, the aquastat has almost illegible text on it) and the DHW on the boiler set at 180F.

And here's my embarrassingly messy boiler install.

EdTheHeaterMan

You should be ashamed of this mess



Just kidding. Looks great. I never knew anyone that took the time to actually use those data ports unless the factory rep was there for a problem

jad3675

@EdTheHeaterMan - Haha, thanks. I mean, where else are you supposed to store the extra thermostat wire?

John

jad3675

Finally put the code up on github, if anyone is interested.

https://github.com/jad3675/Triangle-Tube-Boiler