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Name	WiDo	Beetle ESP32	FireBeetle ESP8266	FireBeetle ESP32
SKU	DFR0321	DFR0575	DFR0489	DFR0478
Microcontroller	CC3000	ESP32	ESP8266	ESP32
Power supply interface	USB or DC2.1	USB	USB or 3.7V Lipo	USB or 3.7V Lipo
USB Powered or External (V)	7 - 12	3.5 - 6.5	3.3 - 5.0	3.3 - 5.0
Operating Voltage (V)	5V	3.3V	3.3V	3.3V
CPU Frequency (MHz)	16	240	160	240
Flash(M)	-	16	16	16
SRAM(KB)	-	520	50	520
Analog pins	6	4	1	5
Digital pins	14	4	10	10
Wi-Fi protocol	802.11b/g	802.11b/g/n	802.11b/g/n	802.11b/g/n
Frequency range	2.4 GHz	2.4 - 2.5 GHz	2.4 - 2.5 GHz	2.4 - 2.5 GHz
UART	1	1	1	1
I2C	1	1	1	1
I2S	1	1	1	1
SPI	1	1	1	1
Compatible IDE	Arduino IDE 1.6+	Arduino IDE 1.6+	Arduino IDE 1.6+	Arduino IDE 1.6+
Download Mode	Micro USB	Micro USB	Micro USB	Micro USB
Arduino UNO Compatible	√	×	×	×
Lipo Charger Support	×	×	√	√
Dimension(mm)	75*54	35*34	58*29	58*29
Weight (g)	30 g	12 g	24 g	24 g
Price($)	$29.9	$9.9	$11.9	$18.9
Key Features	On board 2.4G PCB Antenna and SD card slot.	Integrate a Dual-Core ESP-WROOM-32 module. Support MCU and Wi-Fi &Bluetooth dual-mode communication. V shaped gilded I/O interface, can be sewn on clothes directly.	Arduino、RTOS、microPython Programming Support. Built-in 32-bit Tensilica L106 MCU and 10-bit ADC.	Mobile BLE APP Connection Support. Two way H-bridged Motor Driver with 2A maximum current and wireless socket.

You may also check Bluetooth microcontrollor selection guide to get more information.

This microcontroller enables users to directly burn programs via the on-board USB interface. Meanwhile, Bluetooth and WIFI are integrated in the microcontroller for supporting more applications. With this Beetle-ESP32, you can easily build up your dreaming project.

Installing the ESP32 Board in Arduino IDE - DFRobot

• A small size of 35mm×34mm
• Enable users to directly download and debug programs through Micro USB, free from programmer.
• Large-scale I/O ports with gold plating, easy to screw wire on it or to sew the board on the clothes with wires, no need to solder.
• A group of gold plating power interfaces of honeycomb type, convenient to use.
• Integrate WIFI and Bluetooth

• USB Supply Voltage: 5.0V
• VIN Supply Voltage: DC 3.5-6.5V
• Processor: Tensilica LX6 dual-core processor (One for high speed connection; one for independent programing)
• 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 150 Mbps),  converge A-MPDU and A-MSDU, supporting 0.4us protecting interval.
• Frequency Range: 2.4~2.5GHz
• Bluetooth Protocol: comply with BR/EDR/BLE standard of Bluetooth v4.2.
• On-chip Clock: 40MHz crystal and 32.768 KHz crystal
• Digital Interface: D2, D3, D4, D7
• Analog Interface: A0, A1, A2, A3
• I2C: 1
• Serial Port: 1
• Dimension: 35×34mm/1.38×1.34"

• Beetle ESP32 Microcontroller               x1