iot & smart home
LoraReach: Build an Open LoRaWAN Gateway on a Pi CM4
Brightix's LoraReach carrier board turns a Raspberry Pi CM4 into a customizable LoRaWAN gateway with 4G, GPS, and open schematics. Here is how it…
esp32 & esp8266
Turn Escape Room Puzzles into Home Assistant Devices with ESP32
Two open source Arduino libraries turn escape room puzzles into Home Assistant devices over MQTT. Here's the parts list and the I2C wiring to…
esp32 & esp8266
M5Stack ToughC5: Rugged ESP32-C5 Board for Outdoor IoT
M5Stack's ToughC5 puts an ESP32-C5, Wi-Fi 6, Zigbee and a sunlight-readable touchscreen in a rugged case for $49.90. Here is what outdoor IoT builders…
iot & smart home
Raspberry Pi Runs Home Assistant to Track Its Own Net Zero Goal
Raspberry Pi clamped sensors on every breaker and ran Home Assistant on Pi 4 and Pi 5 to cut energy use. Here is how…
esp32 & esp8266
LocalDot: Give an Echo Dot a Local Home Assistant Brain
AAElectronics' LocalDot swaps an Echo Dot's mainboard for an ESP32-P4 and ESP32-S3 that talk only to Home Assistant. Here's how it works and how…
esp32 & esp8266
Hide an ESP32-C3 IR Blaster Inside a Walnut for Smart Home Control
A maker hid an ESP32-C3 inside a walnut shell to beam IR commands at gear that never got a Wi-Fi upgrade. Here is how…
iot & smart home
IronEar’s ESP32-S3 Sensor Hears 500 Sounds, Skips the Camera
An open-source ESP32-S3 sensor node classifies 500+ household sounds on-device and reports to Home Assistant over MQTT or a private LoRa mesh.
esp32 & esp8266
Off-Grid LoRa Message Board Pairs ESP32-S3 with E-Ink Display
A battery-powered desk display that receives text messages over a LoRa mesh network with no WiFi needed, plus a built-in CO2 and humidity sensor.
iot & smart home
Nordic nRF54LC10A: One Chip for BLE, Thread, Zigbee and Matter
Nordic's nRF54LC10A puts BLE, Thread, Zigbee and Matter on one low-cost chip. Here is what you need to start building with it before kits…
arduino
Arduino UNO Q Smart Doorbell Runs Its Vision Model On-Device
Banzi and Richetta live-build a doorbell whose face recognition never leaves the board. Here is the UNO Q hardware behind it and what you…
iot & smart home
Tiny Contacts Fits Four Relays Onto a 42 x 38 mm ESP32 Board
Four Omron surface-mount relays on a 42 x 38 mm board, driven by a ULN2003A so your ESP32 GPIO pins never touch a relay…
esp32 & esp8266
Build a $10 ESP32-C3 Fridge Monitor That Logs Its Own Data
A $10 XIAO ESP32C3 and a DHT22 keep 30 minutes of fridge temperature history on-device, cutting network traffic by 92 percent. A tidy weekend…