NRF52811 Bluetooth Module User Manual

1. Product Overview

The E73-2G4M04S1FX is a compact Bluetooth wireless module developed by EBYTE, based on the Nordic nRF52811 chip. It incorporates a 32MHz industrial crystal oscillator, ensuring robust industrial performance and stability. This module is designed for a wide range of applications requiring reliable Bluetooth Low Energy (BLE) communication.

Key features include:

• Support for BLE 5.1, encompassing all Bluetooth 5 functions and IEEE 802.15.4-2006.
• Adjustable maximum transmission power of 2.5mW.
• Integrated 32.768 kHz clock crystal oscillator.
• Operation within the global license-free ISM 2.4GHz band.
• High-performance, low-power ARM Cortex-M4 core processor.
• Ample resources: 192KB FLASH and 24KB RAM.
• Wide power supply range: 1.8V to 3.6V (3.3V recommended for optimal performance).
• Industrial-grade design, capable of long-term operation from -40°C to 85°C.
• Communication distance up to 100m under ideal conditions.

Figure 1: Front view of the E73-2G4M04S1FX Bluetooth Module, showing the model number, QR code, manufacturer (EBYTE), and SN placeholder.

Figure 2: Common applications for the NRF52811 Bluetooth Module, including smart home, security systems, drones, wireless remote control, medical monitoring, and automotive industry uses.

2. Setup and Integration

The E73-2G4M04S1FX is a pure hardware System-on-Chip (SoC) module. It requires user programming to function. Nearly all IO ports are exposed to facilitate multi-directional development.

2.1. Programming

Users must program the module with their desired firmware. The nRF52811 comes with a high-performance ARM Cortex-M4 core, IEEE 802.15.4-2006 RF transceiver, and a BLE 5.1 protocol stack. It offers rich peripheral resources such as UART, I2C, SPI, ADC, DMA, and PWM, which can be utilized during programming.

2.2. Antenna Connection

The module can be connected to external antennas via its IPEX interface. Using an external antenna can significantly increase the transmission distance, making it suitable for long-distance communication requirements.

Figure 3: The E73-2G4M04S1FX module equipped with an IPEX antenna interface, allowing for connection to various external antenna forms to enhance transmission range.

3. Operating Principles

The NRF52811 chip supports advanced Bluetooth 5.1 features, including a new direction finding function that enhances Bluetooth positioning capabilities. The module also supports both iBeacon and ordinary broadcast switching, allowing for dynamic configuration of broadcast content to meet personalized broadcast needs.

Figure 4: Illustration showing the E73-2G4M04S1FX module's capability to support both iBeacon and standard broadcast modes, enabling flexible content configuration.

3.1. RF Shielding

The module is equipped with professional RF shielding, providing strong anti-electromagnetic interference performance. This design also makes it anti-static and less prone to damage, ensuring good EMC electromagnetic compatibility.

Figure 5: The E73-2G4M04S1FX module featuring professional RF shielding for enhanced electromagnetic compatibility and durability.

4. Maintenance

To ensure the longevity and optimal performance of your E73-2G4M04S1FX module, follow these general maintenance guidelines:

• Storage: Store the module in a dry, anti-static environment, away from direct sunlight and extreme temperatures.
• Handling: Always handle the module by its edges to avoid touching the components directly. Use anti-static precautions (e.g., anti-static wrist strap) when handling.
• Cleaning: If necessary, gently clean the module with a soft, dry, lint-free cloth. Avoid using liquids or abrasive cleaners.
• Environmental Conditions: Operate the module within its specified temperature range (-40°C to 85°C) and humidity levels to prevent damage.

5. Troubleshooting

If you encounter issues with your E73-2G4M04S1FX module, consider the following troubleshooting steps:

• No Power/Functionality:
  • Verify that the power supply is within the specified range (1.8V~3.6V, ideally 3.3V).
  • Check all power connections for proper contact and polarity.
  • Ensure the module is correctly programmed and the firmware is running as expected.
• Communication Issues:
  • Confirm that the antenna is properly connected to the IPEX interface.
  • Check for environmental interference (e.g., other 2.4GHz devices).
  • Verify that the communication protocols (BLE 5.1) and parameters in your firmware are correctly configured.
  • Ensure the communication distance is within the module's effective range (up to 100m ideal conditions).
• Unexpected Behavior:
  • Review your firmware code for any logical errors or misconfigurations.
  • Check for any short circuits or physical damage to the module or its connections.
  • Ensure proper grounding.

If problems persist after these steps, please refer to the support section for further assistance.

6. Specifications

Figure 6: Physical dimensions of the E73-2G4M04S1FX module, measuring 17.5mm by 23.5mm.

7. Warranty and Support

7.1. Warranty Information

The E73-2G4M04S1FX module comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects under normal use conditions.

7.2. Technical Support

For any technical inquiries, assistance with programming, or troubleshooting issues not covered in this manual, please contact EBYTE customer support. You can find more information and contact details on the official EBYTE website.

Manufacturer: Chengdu Ebyte Electronic Technology Co., Ltd.

Official Website: http://www.cdebyte.com/

Figure 7: Product packaging label displaying manufacturer details and compliance marks.