A wireless (WiFi) tally light for Blackmagic Design ATEM video switchers, based on the M5StickC ESP32 development board and the Arduino IDE.
For more information, see: https://oneguyoneblog.com/2020/06/13/tally-light-esp32-for-blackmagic-atem-switcher/
Based on the work of Kasper Skårhøj: https://github.com/kasperskaarhoj/SKAARHOJ-Open-Engineering