Articles
Everything I have written.
HomeKit builds, projects, guides and blog posts in one place, the newest first.
HomeKit
ESP8266 HomeKit Door Lock
A 12 V electric lock controlled from the Home app with an ESP8266 and a relay, with a manual button and a 5 second automatic relock. A breadboard build made to test the firmware.
Read more
HomeKit
ESP8266 HomeKit Temperature and Humidity Sensor
A DHT11 or DHT22 with an ESP8266 as a temperature and humidity sensor in Apple Home, with a firmware version for each sensor and pin.
Read more
HomeKit
ESP8266 HomeKit NeoPixel Light Strip
A WS2812 LED strip in the Home app on an ESP8266, with a ready-made firmware for strips of 30, 60, 90, 120 or 144 LEDs.
Read more
HomeKit
ESP8266 HomeKit Button Switch
A small ESP8266 that appears in the Home app as a HomeKit switch, to turn another accessory on or off. A test setup with an ESP-01, three buttons and an FTDI adapter.
Read more
Projects
Raspberry Pi Zero W HAT Template for KiCad
A ready-made KiCad starting point for a Raspberry Pi Zero W HAT: the exact board outline, mounting holes and 40-pin header, plus a 3D model, MIT licensed. Includes a walkthrough for creating your own KiCad symbol.
Read more
Projects
Arduino Air Quality Monitor with a Dust Sensor and SD Card Log
An Arduino Nano with a Sharp dust sensor, a DHT22, a clock and an SD card that logs the air quality at home.
Read more
Guides
AT-09 Bluetooth LE Module Pinout
The AT-09 (MLT-BT05) is a Bluetooth 4.0 LE serial module for Arduino and other microcontrollers. The pinout of the 6-pin breakout board and of the 34-pad module on both sides, the datasheet values, the LED and role settings, and the AT commands.
Read more