This was developed using a NodeMCU v2 Dev Kit as it conveniently provides a secondary UART for debugging. It has been tested with the ESP-01 shipped with the PixRacer and it is stable at 921600 baud.
This repository contains the code for making an ESP32-based doorbell that initiates a SIP call. While the code currently only initiates a SIP call and thus makes your phone(s)ring, it might be ...
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