SparkFun ESP32 Thing

Features :
– Dual-core Tensilica LX6 microprocessor
– Up to 240MHz clock frequency
– 520kB internal SRAM
– Integrated 802.11 BGN WiFi transceiver
– Integrated dual-mode Bluetooth (classic and BLE)
– 3.0 to 3.6V operating range
– 2.5 µA sleep current under hibernation
– 28 GPIO
– 10-electrode capacitive touch support
– Hardware accelerated encryption (AES, SHA2, ECC, RSA-4096)
– 4MB Flash memory
– Integrated LiPo Battery Charger