Homemade Emergency Energy Batteries USB Power Under 5 USD
More Homemade External Power Bank Backup Battery for Smart Phone here:Homemade Emergency Energy Batteries USB Power with DC-DC step-up module ~ step-up.
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The is used as a WEB Server to Display Temperature and Humidity information from the sensor. Step Parts List Temperature and Humidity Sensor resistor Step + Sensor Wiring Step Upload Code to ** Change “ssid” and “password” to your wifi network …