FireBeetle ESP32 IOT Microcontroller with WiFi

The DFRobot FireBeetle series are low-power microcontrollers for IoT projects. This board carries a dual-core ESP32 module with WiFi and Bluetooth, according to the marking in the picture an ESP32-WROOM-32D, older units an ESP-WROOM-32. In deep sleep it needs only 10 µA. A charge controller charges the lithium battery via USB. In the Arduino IDE programs can be loaded without switching the boot mode manually.

There are boards as main controllers, covers as expansion boards and general accessories. To monitor the battery voltage on A0/GPIO36, the two resistors R10 and R11 must each be bridged with a solder point (solder jumper).

Recommended alternative from the same series: FireBeetle Board ESP32-E

Recommended Accessories:

• FireBeetle Covers-Gravity I/O Expansion Shield
• Firebeetle Covers OLED Display 128x64 Blue
• FireBeetle Covers LoRa Radio Module 868MHz

Features:

• Compatible with products of the DFRobot FireBeetle series
• Powered via USB 5 V or an external 3.7 V lithium battery (JST 2.0 mm connector), the battery is not included
• TP4056 charge controller on the board charges the battery via USB
• I/O compatible with 3.3 V only
• CH340 USB-to-serial converter, the driver may be needed depending on the system
• In the Arduino IDE the pins D0 to D9 can be addressed directly
• The VCC pin outputs the voltage of the source, about 3.7 V with a battery
• Supports capacitive touch sensors
• Supports MicroPython
• Mounting holes 3.1 mm

Application Examples:

• Battery-powered IoT sensor nodes
• Low-power projects with deep sleep
• Setups with FireBeetle Covers

Documentation:

• DFRobot Wiki
• Schematic
• FireBeetle ESP32 user manual
• CH340 driver macOS
• CH340 driver in the download area

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: DFR0478
• Version: 4.0
• Module: ESP32-WROOM-32D according to the picture, older units ESP-WROOM-32
• Operating voltage: 3.3 V
• Input voltage: 3.3 to 5 V
• Deep sleep current: 10 µA
• Operating current: 80 mA on average
• Maximum discharge current: 600 mA (RT9080)
• Maximum charge current: 500 mA
• Processor: Dual-core Tensilica LX6
• Clock frequency: up to 240 MHz
• SRAM: 520 kB
• Flash: 16 Mbit, DFRobot states 16MB
• WiFi standard: 802.11 b/g/n, 2.4 GHz
• WiFi approvals: FCC, CE, TELEC, KCC
• Bluetooth: v4.2, BR/EDR and BLE
• Digital I/O: 10
• Analog inputs: 5
• Interfaces: SPI, I2C, I2S
• LED_BUILTIN: D9
• Operating temperature: -40 °C ... +85 °C
• Dimensions: 58 × 29 mm
• Weight: 25 g

Scope of Delivery:

• 1× FireBeetle ESP32 IOT Microcontroller with WiFi (Version 4.0)
• 2× Pin header 1×18 pin
• 2× Female header long pins 1×18 pin