FireBeetle 2 ESP32-UE (N16R2) IoT Board (16MB / 2MB PS, Supports Ext Antenna)

A compact IoT microcontroller with dual-core processor, external antenna support, rich interfaces, dual power modes, and multiple programming options. Ideal for IoT projects.

USB InterfaceOfficial table 6 row 1
Program download and power supply, 4.75V-5.5V compatible
Type · power
Charging IndicatorOfficial table 6 row 2
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.
Type · pin
User ButtonOfficial table 6 row 3
Controlled by pin IO27/D4
Type · digital io
Li-ion Battery PortOfficial table 6 row 4
Support 3.5V-4.2V
Type · power
Onboard RGB LightOfficial table 6 row 5

Start wiring

I2S · SPI · Analog

Confirm the data interface matches your host board.

Module pins: USB Interface, Li-ion Battery Port, Low-power Solder Jumper Pad. Schematik maps them to your board in the app.

Related groups

4 groups

Connectors

Sort passive connector adapters from Qwiic boards, LCD modules and microSD card adapters before assuming anything with the right plug will substitute safely.

Connectors & cables · Connectors · 28 parts

Displays

Character LCDs, SPI TFTs, e-paper modules and larger capacitive-touch TFT panels solve different display jobs. Treat display class, interface, controller, resolution, touch, refresh behaviour, storage, voltage and mounting as separate swap checks.

Displays · TFT & LCD displays · 35 parts

Air quality

Choose between MQ gas sensors, VOC/eCO2 indoor-air sensors, true CO2 modules and particulate sensors without treating every air-quality breakout as the same detector.

Sensors · Gas & air-quality sensors · 31 parts

MCUs and boards

ESP32, Arduino Uno, Raspberry Pi Pico, and compatible add-on boards for running builds.

Boards · Microcontroller boards · 24 parts

Pin	Position	Type	Function
USB Interface	Official table 6 row 1	power	Program download and power supply, 4.75V-5.5V compatible
Charging Indicator	Official table 6 row 2	pin	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.
User Button	Official table 6 row 3	digital io	Controlled by pin IO27/D4
Li-ion Battery Port	Official table 6 row 4	power	Support 3.5V-4.2V
Onboard RGB Light	Official table 6 row 5	digital io	WS2812 RGB LED, controlled by pin IO5/D8
Onboard LED	Official table 6 row 6	digital io	LED controlled by pin IO2/D9
Reset Button	Official table 6 row 7	digital io	Press to reset program
Low-power Solder Jumper Pad	Official table 6 row 8	analog	Designed for low power mode and default to be connected. Slightly cut off the thin wire with a knife to disconnect it. When disconnected, static power consumption can be reduced by 500 μA. The power consumption can be reduced to 13 μA after controlling the maincontroller to enter the sleep mode through the program. Note: when the pad is disconnected, you can only drive RGB LED light via the USB Power supply.
GDI	Official table 6 row 9	digital io	DFRobot dedicated Display interface. Refer to the GDI part of this page.
⑩	Official table 6 row 10	pin	ESP32-UE Module / ESP32-WROOM-32UE-N16R2

Pinout

Start wiring

Connectors

Displays

Air quality

MCUs and boards