When I've seen this issue it has always been caused by 'code run amuck', ie bad pointer, array out of bounds, trying to serial print a float as a char etc etc. Go back to KNOWN good code with KNOWN good data and troubleshoot forward.

Went to have a look at the 'Matter Standard'. Seems one must 'sell their soul' to look at the details of the standard. OP wanna show us a copy of the details ?

OK. Digikey, where I bought the part, sorted it out for me on a post I made after 9pm. Turns out programming is on one port and serial output is on the other unlike another part I've been using (Teyleten Robot ESP32-S3-DevKitC-1-N8R2) that has both on the same connection. Seems to me like someone at...

ESP32-S3-DevKitC-1U on Arduino IDE. Load program OK but never any serial output. Simple program, just Serial.begin(115200) and a delay(1000); in setup() then a simple Serial.println("Test"); in loop(). I've tried 3 known good cables, various boot and reset button sequences all with no joy. What is t...

Seems like a nice site, lots of traffic , many posted questions, many visits to each, BUT very little if any discussions on any of them. Many threads have hundreds of visits and most with less than half a dozen replies/answers. Many with zero replies. Why ??

Trying some power reduced things out and ran into an issue, ESP32 WROOM using cmd setCpuFrequencyMhz(240); & getCpuFrequencyMhz(); . Worked a few times trying 10, 40, 80, 240. Then stopped and anytime I execute setCpuFrequencyMhz(240); with any value other than 240 ( ie setCpuFrequencyMhz(80); ) the...