Want to control device over WiFi or Bluetooth using smart phone

[oldcurmudgeon]

I would look at using an esp (8266 or 32) as a web server to interface to a web browser. That way you can use a PC, smart phone, tablet or what ever. You will have to learn some HTML but will give you a lot of flexibility. Here is a slightly complex example from another thread with some follow on posts.

SOLVED Receiving API calls on a ESP-01 (API reversed)

I use a web interface for my esp code. It is more versatile because it can be used by any device that supports a web browser. I also set up a mDNS server so the esp device can be called by name. This does require learning a minimal amount of HTML. Here is a simple example for a millis() driven state machine blinking a LED that I did for another thread. Ignore checkPattern() and everything after the first two lines of loop() for a start. /* ******************************************************…