Just as the Banana Pi Leaf-S3 and XIAO ESP32C3 covered a few days ago, the FireBeetle 2 shares a similar form factor, I/O peripherals including Wi-Fi/BLE, external battery support and an onboard charging circuit.

The FireBeetle 2 was designed around the ESP-WROOM-32E from Expressif Systems and contains a dual core Tensilica LX6 with maximum frequency of 240MHz. On the other hand, the XIAO ESP32C3 features a single RISC-V core (up to 160MHz) while the Banana Pi Leaf-S3 integrates the newer dual core Tensilica LX7 (up to 240MHz).

ESP-WROOM-32E block diagram
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As other ESP32 based MCUs, the FireBeetle 2 supports Wi-Fi with speeds up to 150Mbps and Bluetooth LE. However, Bluetooth supported on the FireBeetle is the 4.2 version which is slower than BLE 5.0 found on the other two devices. 

FireBeetle front (left) and back (right)
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The I/O peripherals found on the FireBeetle 2 are ten digital I/Os, five analog inputs, one SPI, one I2C, one UART, one I2S, one RGB LED, one common LED, one button and one GDI connector for external displays.

FireBeetle 2 pinout 
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This device operates at 3.3V and supports low power mode (2mA). Additionally, there is a PHY 2.0 connector for a lithium battery and an onboard charging circuit with a max charging current of 500mA. 

 
FireBeetle 2 interfaces
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