[SOLVED] ESP32S3 BLE UART gives 'gatt status 133'

Projects Networking, Protocols, and Devices
1

using Arduino IDE 2.3.20 ESP32 core 3.3.10
File>Examples>BLE>UART works OK on an ESP32 connecting to Android Terminal

running on ESP32S3 gives "Connection failed: gatt status 133"

I seem to remember this working in the past on the ESP32S3 so tried with ESP32 core 3.1.0 same result

any ideas?

2

I can not confirm your findings with IDE 2.3.10(latest version, 2.3.20 must be a typo) and esp32 core 3.3.10

With Board Selection ESP32S3 Dev Module I can load the UART example sketch and connect to the esp32S3 with Light Blue, nrfConnect, and Serial Bluetooth Terminal(Morich App) running on a Samsung A54 phone with Android 16.

What is the "Android Terminal" you are trying to connect?

3

using Light Blue tracked down problem - it indicated it could not access my location even though I had enabled access location for the app

somehow in Android settings I had the global "Access my location" switched off

switched it on and BLE Terminal worked OK with ESP32S3

strange thing is BLE Terminal worked OK with a ESP32 even with "Access my location" switched off

thanks for you help!

EDIT: noted that the ESP32 supports BLE 4.2 the ESP32-S3 BLE 5.0
see Comparison table for ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6
may explain why the ESP32 worked OK and the ESP32-S3 failed?
e.g. Bluetooth 5.0 vs. 4.2: Key Differences and Improvements