IoT

How to build a cloud-connected photo frame using Raspberry Pi 4 and Google Drive (via rclone). Photos sync automatically — no SD card swapping required. Uses fbi for framebuffer display and Python for slideshow control. The improved version is 1700% faster to start. Source code available on GitHub.

Step-by-step guide to connecting a CUSTOM CO2-mini USB sensor to a Raspberry Pi, reading CO2 and temperature data with Python (CO2Meter library), writing values to shared memory, and graphing them with Zabbix via UserParameter. All scripts and config files included.

How to build a photo frame with a Raspberry Pi 3 and the official 7-inch touchscreen, then add automatic display brightness control using a GY-30 BH1750FVI ambient light sensor connected via I2C. The brightness control program is written in Python and published on GitHub.

How to use an M5Stack ATOM Lite and a JJY antenna board to build a low-cost JJY signal simulator for radio-controlled clocks in rooms where the standard time signal cannot be received. Total parts cost under JPY 5,000 — a fraction of commercial retransmitters. Includes setup steps and known limitations.