USB board to manage and gather French house main powering energy data output from electricity provider counter.
see <a href="http://hallard.me/utinfo/"; target="_blank">http://hallard.me/utinfo/</a>;

WifInfo

Wifi board to manage and gather French house main powering energy data output from electricity provider counter.
see http://hallard.me/wifinfo/

Particle/NodeMCU RF Gateway

The RF Gateway act as a Node Management.
The gateway will be responsible of node ID attribution, acting like a DHCP server, and sending data to IoT servers
see http://hallard.me/particle-gateway/ and https://github.com/hallard/NodeMCU-Gateway

PT100/1000 Temperature Board with MAX31865

I wanted to measure sensors but one of the most used in industry are the PT100 and PT1000 Temperature Sensor.
This board is small and efficient and using an existing
pinout, the well known NRF24L01 one
See http://hallard.me/max31865/

ArduiPi

Arduino Shield For Raspberry PI (2012)
Pi can do high level thing such as web server, database, ...
This is why I shielded Arduino and Raspberry and let them talk together and assign job to the most competitive one.
http://hallard.me/arduipi