Designed a circuit to automatically switch the power supply from the two power sources (nothing designed to). | kohacraft's blog
ESP32 Mailbox works on USB power but not battery - Need Help With My Project - Blynk Community
I'm trying to power a LoRa ESP32 board (SX1276) for a letterbox sensor. The board is in deep sleep until triggered by a pin change (door sensor), sends LoRa message, then returns
ESP32 not working on battery - ESP32 Forum
Getting the ESP32 to monitor its own battery level - XTronical
ESP32 Mailbox works on USB power but not battery - Need Help With My Project - Blynk Community