last modified: October 23, 2025
Posted on 2015-10-08— Projects
I've published a step-by-step tutorial for building the Data Logger Deluxe. I split the documentation into clear parts — start page, overview, usage, parts list, hardware and software build — so you can follow at your own pace. Please start on the start page and read the full guide.
Posted on 2015-10-04— Projects
I've finished the deluxe data logger and made a short video showing the menu-driven interface, capacitive keypad, and sealed case built for high humidity. I ran into tight flash memory limits and simplified the code; I'm documenting the build and software — please read the full post and check the repo.
Posted on 2015-09-14— Projects
I'm putting the finishing touches on the deluxe data logger: hardware is built and tested, and I'm finalizing the menu-based software. It includes five capacitive inputs, record/view/send/erase functions and wireless charging. Please read the full post for details and prototype photos.
Posted on 2015-09-01— Projects
I fixed a timing bug and logged AM2302 (DHT22) readings every 10 seconds until memory filled. The data revealed temperature precision limits (0.1°C) and jitter that causes humidity jumps. I walk through the patterns, implications for real‑time displays, and link the CSV/Excel—please read the full post for details.
Posted on 2015-08-31— Projects
I noticed my Data Logger Simple was recording identical values every 30 seconds because sleep mode stopped timer1 used by millis(). I fixed this in v1.1 by replacing the DHT timing check with a simpler DHT22-only implementation. Read the full post for details and the v1.1 download.
Posted on 2015-08-27— Projects
I finished a multi-day test of the minimal data logger, recording hourly readings to check stability and battery use. I walk through the reset issue when connecting via TTL, the coarse integer readings, how I imported and charted the data, and the small improvements I plan next — please read on.
Posted on 2015-08-23— Projects
I published a minimal data logger that stores sensor readings in the microcontroller's EEPROM, so no external memory is needed. I walk through parts, hardware assembly, and software — plus a deep-dive on the code and usage. If you're curious, please read the full documentation and share feedback or questions.
Posted on 2015-08-20— Projects
I'm concerned my archived documents could absorb moisture in a root cellar with 75–90% humidity, so I built a DIY data logger to monitor conditions inside sealed boxes. I walk through parts, breadboard-to-stripboard assembly, tests and a wiring diagram — please read the full post for the complete build.