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This little device pulls your local UV index from EPA and display the UV level in 5 different colors and also displays details on the OLED. UV 1-2 is Green, 3-5 is Yellow, 6-7 is Orange, 8-10 is Red, 11+ is purple.

Adafruit Feather M0 WiFi – ATSAMD21 + ATWINC1500
350 Mah Lipo
One NeoPixel
A server that can run php script with a Internet connection
3D printed parts (attached)”

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