The timeline

So, I have been having issues with my automated watering system. I had built a moisture sensor from metal screws held in a plastic lid. Using nuts and washers I could hold wires in place rather than trying to solder on to such thick metal. To prevent surface water completing a circuit, I sealed the heads of the screws with waterproof caulk. However, after two weeks of good performance, the sensor went doolally and emptied the water source in one go. I had avoided the usual issue of electrolysis by powering the sensor circuit no more than four times an hour for a few seconds each time. The screws do not appear to be damaged, but readings are consistently showing high resistance, even in waterlogged soil. Rather than leave my plants at the mercy of the weather, or a malicious water sensor, I have decided to move to an ESP8266-driven setup. This setup uses and ESP8266 to trigger the arduino controlling the pump. Why two microcontrollers? The ESP8266 board only has 3.3v out, but has...

Well, here it is. Post one. This blog will probably veer wildly between subjects that interest me. I create automation using Arduinos, NodeMCU, and Raspberry Pi hardware. I write in Python, mainly, but I can write HTML, CSS, and Javascript as well. Beginning a tentative paddle in the shallow waters at the edge of C/C++, primarily as a consequence of Arduino. I also have an interest in practical applications of technology, with a focus on performing tasks that I do not have time to complete with a job and a family. My first such project involved building an automated watering system for a vegetable garden (not a unique project, but a fun one) and future work involved looking into automating an indoor hydroponics setup for herbs with an eye to possible production for local restaurants. Given the locality, basil, oregano, and other Mediterranean herbs seem to be the best candidates. Longer term, I'm looking to design a larger planting area, away from wifi, that communicates ...