FireBeetle 2 ESP32-E IoT Microcontroller with Header – Arduino IDE

DFRobot FireBeetle 2 ESP32-E is an advanced IoT microcontroller based on the ESP-WROOM-32E module, equipped with dual-core ECO V3 chips, offering improved stability, lower power consumption, and powerful wireless communication. As a versatile ESP32 development board, it supports WiFi + Bluetooth dual-mode, USB-C charging, and Arduino programming, making it ideal for smart home automation, wearables, DIY IoT systems, and wireless sensors.

With a compact stamp-hole design, the board fits perfectly into embedded applications while supporting rich I/O including UART, I2C, SPI, and more. Whether you’re a developer or hobbyist using an ESP32-E module, it provides flexibility and performance with minimal power consumption for any Arduino ESP32 project.

Figure 1. Board Overview

Figure 2.Pinout

Espressif has recently released one wafer-level change on ESP32 Series of products (ECO V3). Below are the main design changes in ECO V3 Series of chips for your ESP32 WiFi Bluetooth applications:

1. PSRAM Cache Bug Fix: Fixed When the CPU accesses the external SRAM in a certain sequence, read & write errors can occur.

2. Fixed When each CPU reads certain different address spaces simultaneously, a read error can occur.

3. Optimized 32.768 KHz crystal oscillator stability, the issue was reported by the client that there is a low probability that under ECO V1 hardware, the 32.768 KHz crystal oscillator couldnt start properly.

4. Fixed Fault injection issues regarding secure boot and flash encryption are fixed.

5. Improvement: Changed the minimum baud rate supported by the CAN module from 25 kHz to 12.5 kHz.

Key Features

• ESP32-E dual-core microcontroller (ECO V3) with improved PSRAM stability and fault protection for IoT development

• Supports WiFi (802.11 b/g/n/e/i/k/r) up to 150 Mbps & Bluetooth v4.2 connectivity

• USB-C powered, onboard charging circuit & PH2.0 lithium battery interface for this IoT microcontroller

• Ultra-low power consumption: average 2mA, deep sleep 10A, ideal for battery-powered ESP32 development board projects

• RGB LED, GDI Display Port, and onboard side key for user interaction with your ESP32-E

• Pre-soldered header version for plug-and-play compatibility with Arduino ESP32 setups

• Compatible with Arduino, MicroPython, and Scratch (future support)

• Ideal for integration with Gravity sensors, IFTTT platforms, and wearable IoT microcontroller projects

Specifications

Whats in the Box

• 1x FireBeetle 2 Board ESP32-E (with Header)

• 1x 18-pin 2.54mm Pitch Pin (Male)

• 1x 18-pin 2.54mm Pitch Pin (Female)

• 1x 14-pin 2.54mm Pitch Pin (Male)

• 1x 14-pin 2.54mm Pitch Pin (Female)

Compatibility Notice

Please note: FireBeetle 2 is not compatible with original FireBeetle shields or their expansion boards due to different pin layouts and dimensions.

Reference

Product wiki