Can they really last that long (on their own)? I looked into this when the ESP8266 first became popular maybe 4 years ago as I wanted to build WiFi temperature and humidity sensors. My calculations were that a set of AAA rechargable batteries (~2000mAh) would last a few days at most, with the device in deep sleep most of the time and waking up every 10 mins to take a reading and send it over WiFi.
Right now I'm looking to create smart blinds. The motors don't use that much power, but the issue is the MCU listening for commands. The ESP32 support BLE, but it's power consumption is still rather high, so batteries would only last a few days at most.
Right now I'm looking to create smart blinds. The motors don't use that much power, but the issue is the MCU listening for commands. The ESP32 support BLE, but it's power consumption is still rather high, so batteries would only last a few days at most.