Gary-
11Step 11
I found after a month or so of usage that having a power switch on the unit was needed. I was using a solar panel to keep the battery charged and a couple of times It wasnt enough and I had to re-charge the battery from USB port. This caused issue with re-connecting to the WIFI AP due to the voltage being low for the startup cycle. Having the switch allows me to turn it off until fully recharged then power it back on and let wifi connect correctly. The switch can be added inline with the 5v line anyplace that works in your container.
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ESP8266 web based temperature sensor
Use an esp8266 to provide temperature data to a web page.
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This was just one way to mount the device, SInce I wanted to have it in a dusty enviornmnet (stable) I choose to keep it enclosed. I am seeing a slight temp boost when I close up the box. Looks like it a pretty even 8 deg offset, so I might just add an offset variable to compensate. If your not worried about dust then you can move the DHT11 outside the case or come up with a case that has vents.
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I have not tested the battery from full charge to empty, but have had it up and running at least 3 days. Right now I am testing a small solar panel to keep the batter charged during the day. The unit is located out in my stable.
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Very interesting ! Thanks a lot for all these instructions ! How long roughly lasts the 18650 battery of your setup ?
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I don't see any vents in the box although the last picture is not se clear. In my experience some ventilation is needed to ensure a proper temperature reading. Maybe you can drill some holes in a nice pattern?
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