ESP32-H2 vs ESP32-H21 vs ESP32-H4: Best Low-Power Thread/BLE Chip
Quick Summary (TL;DR):The ESP32-H2, ESP32-H21 and ESP32-H4 are all low-power Espressif chips built around Bluetooth LE + IEEE 802.15.4 rather than Wi-Fi. The H2 is still the safest choice today for mature boards, Arduino support and proven Thread/Zigbee development. The…