Hi all,
I have a sketch running on a Uno board (I’m 99% is a R3 board, from the pictures). It uses digital outputs to drive a triac board for light dimming control.
Is there a recommended replacement platform that has Bluetooth or WiFi capabilities to program and maintain the sketch wirelessly? Can the same s/w code run on different platforms.
Possibly. If you post the code, using code tags, forum members should be able to answer the question.
Yes, there are platforms such as the ESP8266 (which has Wi-Fi) and the ESP32 (which has Wi-Fi and Bluetooth), and they are compatible with sketches that run on the UNO.
However, your project running on the UNO will need minor modifications and library additions.
Really, as @jremington said, only by seeing your sketch can we say for sure.
A dangerous statement without knowing the code 
It might very well directly write to the hardware (e.g. tiners and port manipulation). Worst case it was all written in assembly 