Learn to use the I2S audio protocol with the ESP32. Display microphone waveforms and build an Internet Radio and an MP3 player.

We’ve made a Walkie-Talkie using the ESP32. Audio data is transmitted over either UDP broadcast or ESP-NOW. So the Walkie-Talkie will even work without a WiF…

Get started with ESP32 Cheap Yellow Display (CYD) board using MicroPython firmware. Board introduction, preparing the libraries, display static text and images, and more

Touchscreen Bluetooth MIDI Controller for the Cheap Yellow Display (CYD), an ESP32 Microcontroller with a built-in display. - NickCulbertson/CYD-MIDI-Controller

Control Duepi_evo based pellet stoves with Home Assistant over wifi using ESPLink (or any other Ser2TCP program) - aceindy/Duepi_EVO

An script for the ESPHome flashed ESP devices to create a climate sensor in Home Assistent for DUEPI controlled pellet stoves - mvroosmalen1970/ESPHome-Duepi: An script for the ESPHome flashed ESP…

reference for powering esp32 with aa batteries

Why I built an e-paper room air monitor for my flat and how the first MVP works: monitor unit with e-paper display, sensor and LED panel -> storage and forwarding to a FastAPI backend with SQLite -> visualisation in an interactive dashboard. TL;DR – In the cold season we tend to keep the windows closed. The air gets “stale”: humidity often rises above 60 %, which can harm our wellbeing and promote mould. At the same time the CO₂ level in the air increases, which impacts our ability to concentrate. So I built a room air monitor that stays unobtrusive as long as everything is in the green zone, but becomes deliberately noticeable once thresholds are exceeded. For my personal love of statistics I also visualise the measurements in a clear dashboard.

kv4p HT is a free, open-source amateur radio transceiver project that allows users to build a VHF radio that plugs into an Android smartphone’s USB-C port, turning the phone into an off-grid device capable of voice and text communication.

This project provides firmware to turn an ESP32-C3 (or compatible ESP32 variant) into a multi-interface Reticulum Network Stack gateway node. It allows devices communicating via different physical layers (WiFi UDP, ESP-NOW, Serial, Bluetooth) to exchange Reticulum packets seamlessly. - AkitaEngineering/ESP32-C3-Reticulum-Node

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