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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
SI_Cheng-Yun
Oh that is strange. The code is common for all platforms
https://github.com/espruino/Espruino/blob/master/libs/bluetooth/bluetooth_utils.c#L135
and the error message you see in your first example is here
https://github.com/espruino/Espruino/blob/master/libs/bluetooth/bluetooth_utils.c#L167
Are you using recent/latest version of Espruino?
EDIT: the specific ESP32 code printing the message starting with "invalid Char UUID:" is here
https://github.com/espruino/Espruino/blob/master/targets/esp32/BLE/esp32_gatts_func.c#L453
but for parsing it is calling the common
bleVarToUUIDAndUnLockmethodand what is also strange is that it probably parses the service ID in same format
on line 510, before it breaks few lines below on parsing characteristics here
https://github.com/espruino/Espruino/blob/master/targets/esp32/BLE/esp32_gatts_func.c#L521
so looks like maybe it reads the string from some wrong place and gets some garbage(?)