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Yeah, mine's under a deck, in a travel soap dish with holes drilled in it. Works great! Power for that one is one of those little solar panels with a micro-USB

• tomcam 4y ago
  Love that! Battery backup for night & downcast days?
  • tlavoie 4y ago
    Yes, I have a 2200 mAh 18650 cell in there too, which the panel will mostly keep charged. In the darker, cloudier winter, I swap in a battery and recharge manually if it's not keeping up. Running on an Adafruit ESP32 Feather board, it wakes up, sends its current readings over Wi-Fi to an MQTT service (that is on a Raspberry Pi), and goes back to sleep for 10 minutes. A little daemon running saves to Sqlite database, and another ESP32 unit inside has its own sensor, as well as displaying both (outside pulled from MQTT). I've got some pictures and such, though haven't quite gotten to the much-belated blog post yet.
    • sgt 4y ago
      Thought about getting a bigger solar panel for those cloudy days?
      • tlavoie 4y ago
        Cloudy season, more like it, BC coast. ;) Really, if I do it every couple weeks or so, it isn't a big deal. I charge the inside one periodically as well, as I don't leave it plugged in. For that one though, I added a last-update time; with the e-paper display, it's not immediately obvious when it has run out of juice.
    • tomcam 4y ago
      > haven't quite gotten to the much-belated blog post yet. Thanks for the preview. Looking forward to it.