along with a low-cost condenser microphone with a transistor-based preamplifier and an LM386 op-amp for the speaker circuit. In the ESP32 module the built-in DAC and ADC are used for audio in and ...

That interface doesn’t have to be special, and [Dakhnod] is here to show us that it can be done with an ESP32 microcontroller ... to reverse engineer a speaker’s communications.

Unexpected Maker's SQUiXL is a battery-powered ESP32-S3 WiFi and Bluetooth IoT controller and development platform with a ...