Hi Tony,
I think there are a couple of options:
1) Use a USB adapter like this one:
https://www.amazon.com/Thermocouple-Measurement-Device-Windows®-Linux®/dp/B003DV02B0You can connect it to LiV Pi via USB and write a piece of Python code similar to:
https://github.com/FirstCypress/LiV/blob/S_development/software/liv/livDB/co2Sensor.pyYou need to know the protocol (serial connection settings, message format) of your adapter. Not sure if the manufacturer documented message format for this adapter. I suppose you could use a sniffer (e.g. wireshark) to find out the format of messages yourself. Your code would be very similar to the co2 sensor code, connections settings and the message exchanges would be different.
I also searched for open source thermocouple USB adapters and I found this one:
http://www.yoctopuce.com/EN/products/usb-environmental-sensors/yocto-thermocouple(it has a Python library btw. at section 14:
http://www.yoctopuce.com/EN/products/yocto-thermocouple/doc/THRMCPL1.usermanual.html - you need to take some time to read through their rather large user manual to see how to configure and use the device. Looks like a mature product to me.
2) Connect your thermocouple to LiV Pi via I2C (there is an I2C port available on LiV’s back). You can use a TMP513 chipset, have a look at the schematics here:
http://www.clever4hire.com/special-articles/home/a-thermocouple-measurement-circuitIf you use this chipset (or a similar one), you need to see the message format over I2C bus so you can write your code. Your code would be somewhat similar to LiV LCD code. You should also make sure that there is no I2C address conflict with BMP180, LCD and DS3231 (for TMP513, address is B8 so that should be OK).
If I find an open source project or code sample, I will add the link here.
Once you get the measurements on LiV, you can write them into LiV DB, add a new graph, trigger alarms, etc...
Best,
Alfred
Locked
