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Show HN: a $40 open-hardware soil sensor that lasts two years on AA batteries
The power-budget spreadsheet is a masterclass.
A maker posted schematics and firmware for a LoRa soil-moisture sensor. Commenters pushed on accuracy, and the author replied with calibration data from 30 sensors.
Read it at the source
Cascadic Analysis 2
Wade InBuild one for your garden this weekend
How can you try this yourself this weekend?
Parts list is under $40 and there is no surface-mount soldering.
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Product SparkCommunity farms are the customer
What product does this inspire or accelerate?
Several commenters run community gardens and want 20+ sensors. A kit plus dashboard is a business.
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Rabbit Holes
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Designing for two years on AA batteriesSleep modes and the math. · Project repo · Swim · 30 min0