Awesome job! I built something similar based on a Lasermad £85 clock kit (1), although with an MQTT based API rather than HTTP. The built in firmware was a bit

Awesome job! I built something similar based on a Lasermad £85 clock kit (1), although with an MQTT based API rather than HTTP. The built in firmware was a bit annoying so I ended up borging an ESP32 in place of the PIC onto the supplied PCB. Now it supports NTP & MQTT commands for power on/off of the nixie tube HV supply, as well as brightness/animations/custom blinks etc. Keep meaning to write a blog post on it. Something to bear in mind if you're using it a reasonable amount is nixie poisoning [2]. My clock firmware runs all the tubes through each digit in rapid succession for a minute at the top of the hour. Also that white connector on your power board is an "enable". You could just connect that to a GPIO on your ESP32, and then ditch the tasmota and let the ESP32 control whether the tube is on or not. Would simplify your cabling and software. If you really want to go overboard, expose it as a MQTT device with HomeAssistant autodiscovery support. It shows up automatically and you can then use any HA integrations to drive it, such as the sunset or presence sensors... 1: http://www.lasermad.com/shop/product/5-tube-nixie-clock-v3-diy-kit-with-perspex-and-teak-case/ http://www.lasermad.com/shop/product/5-tube-nixie-clock-v3-d... 2: http://www.tube-tester.com/sites/nixie/different/cathode%20poisoning/cathode-poisoning.htm http://www.tube-tester.com/sites/nixie/different/cathode%20p...