Clouds, rain, snow, cold (and at this moment, hail), are challenges to both my remote environmental monitor and to my bees. Here's a weeks' worth of continuous data that show both are holding up admirably. Notes of interest:
The system can handle several days of cloudy weather. The load on the battery is low and charging happens quickly when the sun does shine.
More important, the bees in the brood box are able to hold both temperature and humidity quite stable in the face of wide swings in ambient conditions. _I assume_ this is an indication that the bees are down in the brood box consuming honey stores there and haven't moved up to the super where there are 10 full frames of honey and pollen.
One sensor is mounted just under the inside cover.
One sensor is mounted on the top of the hive.
A 650 mAh LiPo battery provides power.
A 5V solar panel connected through a step up DC-DC booster and a LiPo charging circuit
The Huzzah deep sleeps for 30 minute intervals to save power. When it wakes up it:
Reads the sensors
Reads the current battery voltage on the ADC through a voltage divider
Connects to my WiFi router
Sends the data via an MQTT message to a broker running on a junk netbook
Sends the data, using a different MQTT broker to the adafruit.io dashboards I have set up
The code is on github for those who care to take a look.
The local MQTT broker communicates with a Node-Red instance running on the junk netbook. Node-Red grabs the data, throws it into a mongobd database and displays the data graphically. I'm not forwarding ports, thank you very much, but you can see recent data through the adafruit.io dashboards.
Here's a Fritzing view of the perfboard followed by the schematic.
And now some hero shots of the gizmo.
Here's the monitor in its native habitat. The pink insulation is a "weatherproof" housing. The top sandwich box holds the battery and charging circuitry. The bottom sandwich box holds the Huzzah ESP8266 breakout board. The duct tape "weatherproofs" the cabling to the sensors.
This sensor is mounted on the back of the housing and protected from rainfall.
Here's the housing from the front. The 5V solar panel is mounted at a 45 degree angle and pointed south.
Your comments are welcome. Please remember the Golden Rule: Be Excellent To One Another.