The ESP-32 is great for small projects where you don’t need so many I/Os, processing power or interfaces.
ESP32 Version: REV1
Dual-core Tensilica LX6 microprocessor
Up to 240MHz clock frequency
520kB internal SRAM
Integrated 802.11 BGN WiFi transceiver
Integrated dual-mode Bluetooth (BLE and Classic)
Operating voltage: 3.3V
Digital I / O pins: 19
Analog Input Pins: 6
Flash: 4M bytes
PSRAM: 4M bytes
Integrated LiPo battery charger for 3.7V Lipos with max 500mA charging current
Lipo battery connection: PH-2 2.0mm
Support capacitive touch sensors
USB-UART interface: CH340G
Dimension: 50 x 25 x 7mm
Weight: 6g
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