last modified: October 23, 2025
Posted on 2017-04-22— Projects
I describe how the new measurement method let me collect reliable, long-term soil sensor data after a single watering. I discuss a brief power-loss artifact, weather effects on drying, and testing epoxy seals for the sensor. Read the full post to see the measurements, results, and my next steps.
Posted on 2017-04-12— Projects
I began a second long-term test of my plant watering sensor to confirm it tracks moisture cycles after watering and drying. I'm focusing on logging and sealing the sensor's foot for repeatable readings. If you're curious about methods and results, please read the full post and share feedback.
Posted on 2017-03-26— Projects
I ran a five-day long test of my plant watering sensor and the results were confusing, so I started a new, more insulated setup using an Adafruit Feather M0, an optocoupler, and pulse-length encoded signals with interrupts. If you’re interested in the hardware and code details, read the full write-up.
Posted on 2017-02-23— Projects
I struggled to measure microamp currents for my plant watering sensor until I tried the µCurrent Gold. In this post I show oscilloscope traces, energy estimates with and without LED flashes, and explain how the µCurrent converts current to voltage. Read on for measurements and upcoming PCB prototype details.