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Sonoff Wall SwitchView Instructable »
Jack:Not really "stumped". See https://enoscientific.com/ww660/ $300-$700. And we want to build/buy ~300 units. Oh, not asking for anything except advice. I tried X one time, didn't work, but Y did. So I'm thinking - can I take a pizeo chip, and sr04 software. We want to cover 36 sq miles. Using LoRa. So 10 units reporting to a center unit that reports to a web server. And 36 packages.
Would work fine on some, on others the water line and power cable would block the line of sight. I'm thinking a piezo speaker and microphone? A .01 second 1khz burst?
How did you program your 8622? Can you give a wiring diagram? Thanks
Found this several years ago - click on the base of each stem - and other places.http://ag.arizona.edu/hydroponictomatoes/pruning.htm