Thanks a lot @ESP_Sprite, your answer put me in the right direction. I rewrote the code to minimize the usage of string functions and now it works perfectly fine! Here is the rewritten code for future reference in case anybody stumbles on this topic: static int open_lock(uint16_t conn_handle, uint16...

Hi there, I have a problem that is killing me... :) I have a project where I'm using an ESP32-C3. It needs to verify a message received from a server via bluetooth. I am trying to utilise HMAC to do that. This is how it's going down at the moment: There are 3 parties in this: 1: ESP32 powered device...