FireBeetle V1 vs V2 (ESP32/ESP8266/Arduino) Development Board Selection Guide

Choosing the right development board is pivotal when starting a new project with DFRobot's FireBeetle series. If you're comparing the FireBeetle (V1) and the FireBeetle 2 (V2) boards, particularly their ESP32/ ESP8266 / Arduino versions, this guide is for you. We'll break down the critical differences in their main features and hardware/software compatibility, equipping you to select the ideal board for smart home or IoT endeavors.

1.Hardware Compatibility: Are Shields and Modules Interchangeable?

1.1 IO Expansion Shields & Function Modules: Not Compatible

Due to differences in pin layouts, dimensions, and other physical characteristics, IO expansion shields and function modules designed to stack directly onto the main development board are not cross-compatible between the FireBeetle (V1) and FireBeetle 2 (V2).
For example:
Shields for FireBeetle V1, such as the Gravity I/O Expansion Shield for ESP32 or OLED128x64 Display for FireBeetle, cannot be used with FireBeetle V2 boards.

1.2 Gravity & Fermion Sensors / Modules: Compatible

Sensor modules, actuator modules, and other peripherals that connect to the development board via Gravity cables or Fermion connectors (typically using I2C, UART, or similar standard interfaces) are cross-compatible.
These modules communicate with the main controller board through standardized protocols, independent of the specific onboard pin arrangement of the FireBeetle version.
For example:
Modules like the Gravity: SHT31-F Digital Temperature and Humidity Sensor or Fermion: SHT31 Digital Temperature & Humidity Sensor (Breakout) will function correctly whether connected to an  FireBeetle V1 or a FireBeetle V2.

2. Tutorial & Software Compatibility: Can Code and Projects Be Smoothly Migrated?

Example code and tutorials for the FireBeetle and FireBeetle 2 are largely compatible.
However, it's important to note that the official ESP32 SDK (Software Development Kit) is continually updated. These updates may introduce changes to some APIs (Application Programming Interfaces), particularly those related to I2S, Bluetooth Low Energy (BLE), and LEDC PWM control. This could lead to compilation errors if code written for an older SDK version is used with a newer FireBeetle 2 (or a FireBeetle V1 that has been updated with a newer SDK).
Such issues can typically be resolved by consulting the official SDK documentation for the specific microcontroller or the latest tutorials provided by DFRobot and making necessary code adjustments.

3. Should I Buy the  FireBeetle or FireBeetle 2?

We strongly recommend opting for the FireBeetle 2 series.
Here's why:
￮Updated Technology & Support: The FireBeetle 2 series benefits from more current tutorial resources and a more comprehensive learning pathway.
￮Future-Proofing: As a main controller for upcoming projects, FireBeetle 2 offers enhanced performance and a richer feature set.

Specific Recommendations:
￮If you are a beginner or new to these platforms, the FireBeetle 2 ESP32-E IoT Microcontroller (32M / 512KB, Supports Wi-Fi & Bluetooth) is an excellent choice for foundational learning and getting started.
￮If you have specific functional requirements or defined project goals, please refer to our [Development Board Selection Guide] to choose other FireBeetle 2 models that best suit your needs.

4. What are the Core Improvements of FireBeetle 2 Over the FireBeetle 1?

FireBeetle 2 is a comprehensive upgrade from the , offering significant advantages in ease of use, expandability, and future-readiness.

4.1. Design and Physical Interface Differences:

A visual comparison reveals the following key changes (which directly contribute to shield incompatibility):
￮Pin Header Layout: The layout of the pin headers on both sides has changed, making IO expansion shields incompatible between FireBeetle V1 and V2.
￮USB Interface: Both the type and position have been updated (see comparison table below).
￮LiPo Battery Connector: The position has been modified.
￮Onboard Buttons: FireBeetle 2 adds a user-programmable button, and the button positions have been optimized.
￮Screen Interface: FireBeetle 2 introduces a dedicated GDI (General Display Interface) connector, simplifying screen connections.

4.2 FireBeetle V2 vs. FireBeetle V1: Key Enhancements

Summary

The FireBeetle 2 series, especially its ESP32-based offerings, marks a considerable advancement over the FireBeetle V1. With its contemporary design, improved performance, enhanced ease of use through features like USB Type-C and a GDI interface, and a more future-ready feature set including broader chipset options, the FireBeetle 2 stands as the clearly recommended option for initiating new projects or for educational exploration in the IoT space.