DFRobot FireBeetle 328P BLE 4.1
Low-power Arduino-compatible board with ATmega328P and Dialog BLE 4.1 chip, featuring 14 digital I/O, 6 analog inputs, wireless OTA programming, 25uA deep sleep, onboard LiPo charging, and dual interrupt wakeup in a compact 58x29mm form factor.
$18.90
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Specifications
Components
Atmel ATmega328P 8-bit AVR microcontroller running at 8MHz with 32KB flash, 2KB SRAM, 1KB EEPROM, Arduino Pro/Pro Mini compatible.
Dialog Semiconductor BLE 4.1 chip supporting central and peripheral modes, up to 4-device cascade, P2P wireless programming, and 4 KB/s throughput.
GPIO Map
Overview
The DFRobot FireBeetle 328P BLE 4.1 (SKU: DFR0492) combines the familiar ATmega328P microcontroller with a Dialog BLE 4.1 chip to create a low-power, Bluetooth-enabled Arduino board. Running at 3.3V and 8MHz, it is compatible with the Arduino Pro/Pro Mini bootloader and programming environment, making it an easy choice for developers who want to add BLE connectivity to Arduino projects.
The Dialog BLE 4.1 chip supports both central and peripheral modes with multi-device cascading of up to 4 devices and a maximum data throughput of 4 KB/s. A standout feature is peer-to-peer wireless programming via Bluetooth, eliminating the need for a physical USB connection during development. The "KISS connection" feature enables automatic pairing when devices are brought into close proximity.
Power efficiency is a key design goal -- the board achieves 25 microamps in power-down mode and 70 microamps with active interrupt monitoring. Dual interrupt wakeup via D2 and D3 pins allows the board to sleep until triggered by external events. The onboard lithium battery charging circuit supports 3.7V Li-ion cells with up to 400mA charge current and 600mA LDO output, making it well-suited for battery-powered wearables, beacons, and IoT sensor nodes.
Use Cases
5Wearable
Body-worn computing devices including smartwatches, fitness bands, and health monitors.
Battery Powered Sensor Node
Low-power sensor nodes running on battery for wireless data collection and monitoring.
Asset Tracking
Tracking the location and status of physical assets like vehicles, packages, and equipment.
IoT
Internet of Things applications including connected sensors, actuators, and smart devices that communicate over WiFi, BLE, LoRa, or other wireless protocols.
Remote Sensor Nodes
Deploy wireless sensor nodes in remote locations using LoRa, NB-IoT, or cellular connectivity.
Where to Buy
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