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
Tech Note 057 - ESP32 Ultra Low Power Test Results - YouTube
ESP32 ESP8266 4x 18650 Battery USB Power Bank Shield Holder V9 3V/5V – diymore