[chbot] Robotics Group meeting notes Monday 16 July 2018

[Eliot Blennerhassett]

On 16/07/18 22:11, Mark Atherton wrote:

> Eliot gave a demo of his integrated energy-monitor project. System
> comprises current-transformers, Arduino, and a raspberry Pi. Comms
> appeared to be mostly MQTT, with a node-RED back-end. Lots of new,
> planned features, including and electric kiln monitor.

Thanks all for an interesting evening.

Some links relating to my stuff:

Emonpi, I built my own subset of this
https://wiki.openenergymonitor.org/index.php/EmonPi

My forked version of the arduino code is here
https://github.com/eliotb/emonpi

The raspberry pi is running emoncms (the graphs etc)
https://github.com/emoncms/emoncms

and Node RED (the block diagram programming bit)
https://nodered.org/docs/hardware/raspberrypi.html

The current transformers are about $6 each from aliexpress
https://www.aliexpress.com/item/Non-invasive-Split-Core-Current-Transformer-AC-current-sensor-100A-SCT-013-000/32470016606.html

Thermocouple amplifier interface was MAX31856 from Sparkfun via Nicegear
https://nicegear.nz/product/adafruit-universal-thermocouple-amplifier-max31856-breakout

My micropython driver for this is here:
https://github.com/eliotb/micropython-max31856

BTW Type R thermocouple is platinum/rhodium, goes up to about 1480 degrees.

The controllers in the thermocouple monitor and the energy meter are
Wemos D1 e.g. https://nicegear.nz/search/?q=wemos+d1


--
Eliot