After your code has been downloaded to the micro:bit, assemble your SODIS system water bottles in a location with direct sunlight. You’ll want to make sure the bottles are laying horizontally for the most sun exposure.

Now it’s time to test your SODIS system!
After leaving your SODIS system for a few hours or days, is the water clean to drink? You’ll know it’s safe to drink when the micro: bit LEDs display the symbol you coded during programming.

How has the weather in your area affected your SODIS system? If it was cloudy, it’s possible our Solar Water Disinfection system needs longer to process. Alternatively, if it’s sunny or hot, it’s possible our water was disinfected faster!