Wireless tally light for use with ATEM switchers. Connects over WiFi using only a D1 mini board (ESP8266 WiFi module) and a RGB LED. Should easily be convertable to use with regular Arduino boards and an ESP2866 module, by changeing the include statements and a few other things (however, this is not tested).

DIY guide is available in the wiki.

Once set up, it will automatically connect to an ATEM swithcer over WiFi and function as a tally light.

Once the program is uploaded to the ESP8266 the setup is done with a webpage it serves over WiFi where you are able to see status details, and perform the basic setup. Depending on if it's connecting to a known network or not it will serve the webpage on it's IP address, or on 192.168.4.1 (default) over a softAP (access point) named "Tally light setup". (On first run you might run into issues with earlier WiFi settings if it connects to a known WiFi, as it can set an invalid static IP-address. To avoid this, select "Sketch + WiFi Settings" in Tools -> Erase Flash: "setting" -> ... when uploading the program, which will reset the WiFi settings).

Once set up with the correct tallyNO and IP-addresses, it should automatically connect to the swithcer over WiFi, and start working as a tally light. (IMPORTANT - Swtitcher and tally light must be connected to the same network!)

The different states of connection is signalled with LED colors.

By default the tally light should be set up to work as a normal tally light would in a professional enviroment. However, as I in my personal use case needed it to work a bit differently, I added the following modes of oparation for convenience.

NOTE: Atem swithcers only allow for 5-8 simultanious clients (dependant on the model). Be mindful of this as each of these tally lights will act as a seperate client alongside eg. a computer running Atem software control.

See details at ESP8266 on how to setup and use ESP8266 modules like a regular Arduino board. They have links for further documentation as well.

Based on ATEM libraries for Arduino by SKAARHOJ, available at Git repo: SKAARHOJ-Open-Engineering

Inspired by ATEM_Wireless_Tally_Light (However, this works completely different)