ESP32-based four-channel smart battery charger and tester using BQ2589x controllers, ACS781 current sensors, TCA9548A I²C multiplexing, RGB status, load-based capacity estimation and real-time JSON telemetry.
embedded-systems multi-channel tca9548a battery-management-system battery-testers battery-charger lithium-ion-batteries embedded-firmware capacity-estimation bq2589x
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Updated
Jan 10, 2026 - C++