This FireBeetle 2 development board has 16M Flash and 2M PSRAM, which helps to drive applications like the LVGL graphics library used in interface design and interaction. Powered by Espressif's ESP32-WROOM-32E-N16R2 module, it includes a 32-bit dual-core processor running at up to 240MHz.

Supporting USB-C and an external 3.7V lithium battery power supply, it can automatically switch between power sources in dual power supply mode. It also has USB and external DC charging modes. This board is great for IoT projects with dual-mode communication support for WiFi and Bluetooth.

We now stock two variants of this board:

Onboard PCB Antenna = FireBeetle 2 ESP32-E (SKU DFR1139)
External Antenna (With a 2.4GHz antenna included) = FireBeetle 2 ESP32-UE (SKU DFR1140)

The main advantage of external antennas is that they can provide higher gain, which improves the communication range of Bluetooth or WiFi.

Features

Equipped with ESP32-WROOM-32E-N16R2 dual-core module
Clock frequency up to 240MHz, with 16M Flash and 2M PSRAM for large memory capacity
Low-power development board, supporting dual-mode communication of WiFi and Bluetooth
Onboard GDI display interface for quick connection to display screens
Onboard charging circuit and PH2.0 lithium battery interface, supporting dual power supply and automatic switching
Supports various programming methods such as Arduino IDE, ESP-IDF, Micro-Python
Compact design, small size, suitable for space-limited and embedded IoT projects

What's on Board

No.	Function	Description
1	USB Interface	Program download and power supply, 4.75V-5.5V compatible
2	Charging Indicator	Red LED for indicating charging status: 1. Off when fully charged or not charged; 2. On when charging; 3. Quick flash when powered by USB, and no battery connected.
3	User Button	Controlled by pin IO27/D4
4	Li-ion Battery Port	Support 3.5V-4.2V
5	Onboard RGB Light	WS2812 RGB LED, controlled by pin IO5/D8
6	Onboard LED	LED controlled by pin IO2/D9
7	Reset Button	Press to reset the program
8	Low-power Solder Jumper Pad	Designed for low power mode and default to be connected. Slightly cut off the thin wire with a knife to disconnect it.
8	Low-power Solder Jumper Pad	Note: when the pad is disconnected, you can only drive RGB LED light via the USB Power supply.
9	GDI	DFRobot dedicated Display interface. Refer to the GDI part of this page.
10	ESP32-E Module	ESP32-WROOM-32E-N16R2

Specifications

Power Parameters

Input Voltage
- USB-C interface: 5V DC
- PH2.0 interface: 3.7V Li-ion
- VCC pin: 5V DC

MCU Parameters

Processor: Tensilica LX6 dual-core processor (one core for high-speed connectivity, one core for independent application development)
Clock Frequency: 240MHz
SRAM: 520KB
ROM: 448KB
Flash: 16MB
PSRAM: 2MB
On-chip Clock: 40MHz crystal oscillator, 32.768KHz crystal oscillator

Wireless Parameters

Wi-Fi Standard: FCC/CE/TELEC/KCC
Wi-Fi Protocol: 802.11 b/g/n/d/e/i/k/r (802.11n, up to 150 Mbps), A-MPDU and A-MSDU aggregation, supports 0.4us protection interval
Wi-Fi Frequency Range: 2.4~2.5 GHz
Bluetooth Protocol: Compliant with Bluetooth V4.2 BR/EDR and BLE standards
Bluetooth Audio: CVSD and SBC audio
Bluetooth Frequency Range: 2.4~2.5GHz

Peripheral Parameters

Digital Pins 17x: IO0, IO1, IO2, IO3, IO4, IO12, IO13, IO14, IO15, IO17, IO18, IO19, IO21, IO22, IO23, IO25, IO26
Analogue Pins 11x: IO0, IO2, IO4, IO12, IO13, IO14, IO15, IO25, IO26, I34, I35
UART Interfaces: 3x
SPI Interface: 1x
I2C Interface: 1x
I2S Interface: 1x
DAC Interface: 2x
Touch Interfaces: 7x
LED PWM Channels: 16x
RGB_LED: WS2812
Display Interface: GDI

Other Parameters

Interface Compatibility: FireBeetle V2 series compatible
Module Size: 25.4mm x 60mm
Weight: 23.4g

Resources

Pinout

Package Contents

1x FireBeetle 2 ESP32-E (N16R2) IoT Microcontroller
1x 2.4GHz WiFi and Bluetooth antenna (For the External Antenna version only)
1x 18-pin-2.54mm Pitch Pin
1x 18-pin-2.54mm Pitch Pin Female
1x 14-pin-2.54mm Pitch Pin
1x 14-pin-2.54mm Pitch Pin Female

DFRobot FireBeetle Development Boards