Wow, I had a nice long reply, and the forum site went away momentarily and I couldn't post it... Okay, let's see. Interesting thought on just generating the PCM and expecting BLE to interpret it. Very clever. I'll have to do some research on that one. As for the local net of devices/boats or whateve...

Hi all, I've implemented a sailboat race timer for the ESP32, based on similar code for ESP8266. Basically it is a 5 minute countdown timer that alerts deck crew that certain flags need to be raised and lowered during the start sequence. The entire unit is battery powered and fits in your hand, and ...