The NRF51822 BLE 4.0 Wireless Module (Onboard Rev3) is a versatile Bluetooth Low Energy (BLE) and 2.4GHz wireless communication module based on Nordic’s NRF51822 SoC. It features a powerful ARM Cortex-M0 processor, onboard antenna, and compact form factor — ideal for IoT, wearable, and sensor-based wireless projects.
✨ Key Features and Benefits
- Bluetooth 4.0 (BLE) compliant with ultra-low power consumption
- 2.4GHz wireless communication supporting multiple protocols
- ARM Cortex-M0 32-bit processor with high efficiency
- Onboard PCB antenna for reliable signal transmission
- Multiple GPIOs and peripheral interfaces (UART, SPI, I²C, ADC)
- Compact size and easy to embed in wireless applications
- Ideal for IoT sensors, wearables, and smart devices
🔧 Material and Construction Details
| Component | Material / Type | Description |
|---|---|---|
| Main Chip | Nordic nRF51822 SoC | Integrated ARM Cortex-M0 + 2.4GHz transceiver |
| PCB | FR-4 multilayer | Provides mechanical strength and signal integrity |
| Antenna | Onboard PCB trace antenna | Compact antenna offering stable wireless range |
| Interface Pins | 2.54mm header pins | Provides UART, SPI, I²C, GPIO connections |
| Power Regulation | Onboard LDO (Rev3) | Ensures stable 3.3V supply for SoC operation |
📚 Use Cases and Applications
- Bluetooth Low Energy (BLE) IoT communication
- Smart home automation devices
- Health and fitness trackers
- Wireless sensor networks
- Remote control and telemetry systems
- Beacon-based indoor positioning systems
🔍 Technical Specifications
| Specification | Details |
|---|---|
| Chipset | Nordic nRF51822 (ARM Cortex-M0) |
| Bluetooth Version | Bluetooth 4.0 Low Energy (BLE) |
| Frequency Band | 2.4 GHz ISM band |
| Operating Voltage | 1.8V – 3.6V (typical 3.3V) |
| Flash Memory | 256 KB |
| SRAM | 16 KB |
| GPIO | Up to 31 configurable I/O pins |
| Interfaces | UART, SPI, I²C, PWM, ADC |
| Transmit Power | -20 dBm to +4 dBm adjustable |
| Receive Sensitivity | -93 dBm |
| Communication Range | ~30 meters (open area) |
| Operating Temperature | -40°C to +85°C |
| Dimensions | Approx. 18 × 21 mm |
🧼 Care & Maintenance
Handle the module using anti-static precautions. Avoid contact with the antenna area when powered. Keep away from humidity and dust. Ensure correct voltage and polarity when connecting power and signal lines.
⚠ Safety Information
Do not exceed rated voltage levels. Always power down before connecting or disconnecting pins. Keep module in a well-ventilated, static-free workspace. Improper handling may affect antenna performance.
👍👎 Pros & Cons
| Pros | Cons |
|---|---|
| Integrated SoC with low power BLE communication | Requires firmware programming knowledge |
| Multiple GPIOs and peripherals available | No onboard USB interface for programming |
| Stable and proven Nordic BLE chipset | Limited flash size for complex applications |
| Compact design with onboard antenna | Range depends on environment and antenna placement |
🅿 Product Images:
