DFRobot Beetle Microcontroller, BLE and Beetle

Brand: DFRobot

The Beetle-ESP32 Microcontroller is only 35 x 34mm (1.38 x 1.34in.) in size and is a simplified version of FireBeetle-ESP32, specially designed for electronic engineering fans and DIY lovers. It is equipped with 4 analogue ports, 4 digital ports, UART and I2C interfaces, making it a perfect replacement for many physically larger boards.

The microcontroller enables users to directly burn programs via the on-board USB interface and has Bluetooth and WIFI integrated in the microcontroller for supporting more applications.

Features:
Small size: only 35 x 34mm
Directly download and debug programs via Micro USB without a programmer
Large-scale I/O ports with gold plating, easy to twist wire on it or sew on to clothes with wires, no need to solder
A group of gold plated power interfaces of honeycomb type, convenient to use
Integrated WIFI and Bluetooth

Specification:
USB supply voltage: 5.0V
V_IN supply voltage: DC 3.5 to 6.5V
Processor: Tensilica LX6 dual-core processor (One for high speed connection; one for independent programming)
Frequency: 240MHz
SRAM: 520KB
Flash: 16Mbit
Wi-Fi standard: FCC/CE/TELEC/KCC
Wi-Fi protocol: 802.11 b/g/n/d/e/i/k/r (802.11n, high speed can reach to 150Mbps), converge A-MPDU and A-MSDU, supporting 0.4us protecting interval
Frequency range: 2.4 to 2.5GHz Bluetooth protocol: complies with BR/EDR/BLE standard of Bluetooth v4.2
On-chip Clock: 40MHz crystal and 32.768kHz crystal
Digital interface: D2, D3, D4, D7
Analogue interface: A0, A1, A2, A3
I2C: 1
Serial port: 1
Dimensions: 35 x 34mm