ESP32 Guides, Projects & Board Comparisons (2026)
Practical ESP32 tutorials, GPIO references, Home Assistant integrations and real-world projects.
Latest ESP32 News
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ESP32-H21 Announced: Low-Power Thread and Bluetooth LE SoC
Espressif has announced the ESP32-H21, a new low-power wireless SoC designed for Thread, Matter, Zigbee, and Bluetooth Low Energy devices. The company published the announcement on March 3, 2026, positioning the chip as an enhanced option for battery-sensitive IoT products. The main point of the ESP32-H21 is simple: it is an incremental update to the […]
ESP32 Boards & Pinouts
Home Assistant
Featured Guides
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STMPE610 Resistive Touch Controller Explained
This example shows how to read touch coordinates from an STMPE610 resistive touch controller using I²C or SPI. The sketch…
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PCF8574 LED Control with ESP32 (I²C GPIO Expander)
This example shows how to control 8 LEDs using the PCF8574 I²C GPIO expander with an ESP32. The sketch cycles…
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Adafruit nRF8001 BLE Callback Echo Example
This example shows how to use the Adafruit nRF8001 Bluetooth Low Energy breakout in callback mode. The sketch starts advertising,…
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GC9A01A Round Display Adafruit Example
This example is the classic Adafruit graphics demo for the GC9A01A round TFT display. It initializes the display over SPI,…
Which ESP32 Board Should You Choose?
ESP32 Versions Explained
ESP32-S3 Boards Compared
ESP32-C6 Versions Compared
ESP32 & Home Assistant Guides
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ESP32 Gas Meter Pulse Sensor for Home Assistant
Gas is one of the cleanest Home Assistant utility projects because it gives you something genuinely useful without needing cloud…
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ESP32 Electricity Meter Pulse Reader for Home Assistant (ESPHome 2026 Guide)
Read your home electricity meter’s pulse LED with an ESP32 and ESPHome, then send real-time power and total kWh to…
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ESP32 Water Meter for Home Assistant (ESPHome 2026 Guide)
Turn a basic pulse-output water meter into a fully local Home Assistant sensor using an ESP32 and ESPHome. This guide…
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ESP32 Smart Relay for Home Assistant (ESPHome)
This guide shows how to build a safe ESP32 smart relay (Shelly-style) for Home Assistant using ESPHome (optional MQTT). Includes…