Solar-Power ESP32 with 18650 Monitoring
Nighttime is the hard part for a Wi-Fi sensor running outdoors. This design stores daytime energy in one 18650 cell, regulates it for an ESP32 or ESP8266, and reports battery voltage through an ADC. Deep sleep helps balance changing sunlight, wireless use, charging limits, and overnight power needs.
Read the build on randomnerdtutorials.com: Solar-Power ESP32 with 18650 MonitoringFeatured in TinkerNews Issue 36 ·
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Read the build on randomnerdtutorials.com: ESP32-C3 Super Mini: Wi-Fi Tests and Deep SleepTurning an E-Waste PC into a Router
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Read the build on github.com: Turning Huawei Solar into Home Assistant DataBuild Long-Running ESP32 Sensor Nodes with Deep Sleep
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Read the build on github.com: Build a Pocket BLE Privacy Scanner with an M5Stack