Slab Hydronic heating monitoring

Community Projects
1

I have installed a hydronic radiant heating system that’s embedded in concrete Alabama this includes a snow melt system on concrete stairs.

I have thermocouples already in place. These include incoming and outgoing temps at the heat exchanger and slab temps in different zones.

I want to set up a dedicated tablet that displays graphical data on the temp so I can see the heat times and latent heat capacity of the slabs. so I would need datalogging of 6 or 8 sensors.

So I was looking at the sparkfun blynk board and to use the blunk app to easily do the graphics. But I have no clue how to set this up from the hardware side. A bit out of my league with these kinds of boards. Of course there’s no example of multiple analogue inputs since this is a pretty specific task.

Can you please recommend which boards I would need and how to set it up the multiple temp sensors so I can run Blynk to graph them.

Thanks,

Jamie

2

Hi Jamie.

I’m afraid I don’t carry anything that would work for your project directly with the Blynk board, but assuming you have K type thermocouples, you could use 6-8 of our [MAX31855K thermocouple amplifiers connected to several [ESP8266 Thing Dev boards. The Thing Dev is similar to the Blynk board but has some more I/O pins broken out. The Thing Dev also works with the Blynk app.

The MAX31855K boards have a SPI bus and several can share the same MOSI, MISO and SCK pins but you’d need a dedicated CS pin for each breakout.](https://www.sparkfun.com/products/13711)](https://www.sparkfun.com/products/13266)