ESP32: read battery voltage and fuel gauge (MAX17048) instead of guessing
Read real state-of-charge from a LiPo with the MAX17048 fuel gauge over I2C. Percent, voltage, and charge rate instead of a voltage lookup table.
Tag
#battery
7 tutorials
ESP32: wire a 18650 battery with a TP4056 charge controller
Wire a single 18650 cell to an ESP32 using the TP4056 charge controller. The minimum circuit for any battery-powered ESP32 project.
ESP32: dev boards vs bare modules, the right pick for battery projects
When to use a $5 dev board and when to drop down to the bare ESP32 module. The tradeoffs that matter for battery, size, and cost.
ESP32: measure DC current with the ACS712 current sensor
Wire an ACS712 current sensor module to an ESP32 and measure DC current in amps. The right way to monitor power consumption of battery devices.
ESP32: solar + 18650 battery for perpetual projects
Add a small solar panel to your 18650 battery setup for perpetual operation. The math for sizing the panel and the protection circuit you actually need.
ESP32: power with a LiPo battery and TP4056 or MCP73831 charger
Wire a LiPo battery to an ESP32 with a TP4056 or MCP73831 charger. The safer alternative to 18650 for projects that get handled or carried.
ESP32: deep sleep and battery life, the honest numbers
Put an ESP32 into deep sleep and measure the actual current draw with a multimeter. Includes what to expect on different boards and battery chemistries.