1. Overview
The DIYmalls BN-220 is a compact GPS receiver module designed for various applications including Arduino projects, RC vehicles, FPV drones, and flight control systems. It features 4MB of flash memory for saving configurations and supports dual GPS and GLONASS satellite systems. This module operates with NMEA-0183 protocol at a default baud rate of 9600bps and a 1Hz update rate. It does not include a compass.
Image 1.1: The DIYmalls BN-220 GPS Module, a compact unit for navigation and positioning.
2. Specifications
| Feature | Value |
|---|---|
| Item Weight | 0.35 ounces |
| Product Dimensions | 7.48 x 3.15 x 0.59 inches |
| Display Size | 2 Inches |
| Voice Command | Buttons |
| Brand | DIYmalls |
| Model Name | BN 220 |
| Vehicle Service Type | Car, Truck |
| Screen Size | 2 Inches |
| Special Feature | Multi-Satellite System Support |
| Connectivity Technology | 4pin 1.0mm cable |
| Map Type | Street |
| Audio Output Mode | speaker |
| Mounting Type | Panel Mount |
The BN-220 module is designed for easy integration into various electronic projects. It supports both GPS and GLONASS for enhanced positioning accuracy.
Image 2.1: Detailed pinout diagram and a comparison table showing different Beitian GPS module models, their interfaces, sizes, flash memory, compass presence, and antenna types.
3. Package Contents
The package includes the following items:
- 1 x BN-220 GPS Module
- 2 x 15cm Cables
Image 3.1: The BN-220 GPS module shown with three different types of connection cables, illustrating the included accessories.
4. Setup and Installation
4.1. Connecting to a PC for Configuration
To configure the BN-220 GPS module using a computer, you will need a USB-to-TTL converter. Follow these steps:
- Install the u-blox driver and u-center software on your computer.
- Install the CP210X driver in your computer.
- Connect the USB-to-TTL converter to the BN-220 GPS Module. Ensure the connections are correct: VCC to 5V, GND to GND, TX to RX, and RX to TX. Then, plug the USB-to-TTL converter into your computer.
- Open the u-center software, select the correct COM port, and set the baud rate to 9600.
Image 4.1: The BN-220 GPS module connected to a USB-to-TTL converter, which is then plugged into a laptop for configuration. The blue LED on the GPS module indicates activity.
4.2. Connecting to an Arduino Board
To integrate the BN-220 GPS module with an Arduino board, connect the pins as follows:
- VCC to Arduino 5V
- RX to Arduino Digital Pin D4
- TX to Arduino Digital Pin D3
- GND to Arduino GND
Image 4.2: The BN-220 GPS module connected to an Arduino board with color-coded wires indicating VCC, RX, TX, and GND connections.
4.3. Connecting to a Flight Controller
Wiring the GPS module to a flight controller is straightforward. Connect it directly to a free UART port (TX to RX, RX to TX) and provide 5V power.
Image 4.3: A diagram illustrating the connection of the BN-220 GPS module to a flight controller, showing the wiring for 5V, RX, TX, and GND.
5. Operation
5.1. Cold Start and Satellite Acquisition
When powering up the BN-220 GPS module for the first time in a new location, it will take longer to acquire satellite lock. This process is known as a "cold start." Once the initial cold start is complete, subsequent restarts will achieve satellite lock much faster.
5.2. Data Output and LED Indicator
The module outputs NMEA-0183 data. A blue LED indicator on the module signifies data output. When the blue light flashes, it indicates data is being transmitted. If the amount of output data is large, the blue light will remain steadily on.
Video 5.1: Demonstration of the BN-220 GPS module's blue LED indicator, showing its behavior during data output.
6. Configuration
The BN-220 GPS module can be configured using the u-center software. The module has flash memory to save configurations, so you do not need to reset data each time you use it.
Video 6.1: A guide on configuring the DIYmalls GPS receiver using u-center software, demonstrating how to adjust various settings.
6.1. Changing Baud Rate
To change the baud rate of the GPS module:
- Open the u-center software. From the menu bar, navigate to View > Configuration View, and open it.
- Select PRT (Ports). Enter the desired baud rate (e.g., 115200) and click Send.
- After changing the baud rate, you must switch the u-center software to the new baud rate to continue receiving data.
- To save this configuration permanently, go to View > Configuration View > CFG (Configuration). Select the appropriate options (e.g., Save current configuration and FLASH under Devices) and click Send.
6.2. Changing Operating Mode (GNSS Configuration)
To adjust the GNSS configuration (e.g., enable/disable satellite systems):
- Open the u-center software. From the menu bar, navigate to View > Configuration View, and open it.
- Select GNSS (GNSS Config). Adjust the 'Enable' checkboxes for the desired satellite systems (e.g., GPS, GLONASS, Galileo, BeiDou). Click Send.
- To save this configuration permanently, go to View > Configuration View > CFG (Configuration). Select Save current configuration and FLASH under Devices, then click Send.
6.3. Changing Update Rate
To modify the GPS update rate:
- Open the u-center software. From the menu bar, navigate to View > Configuration View, and open it.
- Select RATE (Rates). Enter the desired measurement period (e.g., 100 ms for 10 Hz) and navigation frequency. Click Send.
- To save this configuration permanently, go to View > Configuration View > CFG (Configuration). Select Save current configuration and FLASH under Devices, then click Send.
7. Troubleshooting
If you encounter any issues with your BN-220 GPS module, consider the following:
- No Driver Installation Needed for Raspberry Pi: When using the module with a Raspberry Pi, no specific driver installation is required, but you will need to install appropriate software for communication.
- Cold Start Time: The first time the BN-220 GPS module is powered on in a new location, it will take longer to acquire satellite signals (cold start). Subsequent starts will be faster.
- Configuration Persistence: The BN-220 GPS module includes flash memory to save your configurations, so you do not need to reconfigure it every time you use it.
- Data Level: The module operates at TTL level by default. If RS-232 output is required, a TTL to RS-232 converter cable must be used.
- No Compass: The BN-220 GPS module does not include a compass. If a GPS module with both flash memory and a compass is needed, consider models like the BN-880.
8. Support
For further assistance or inquiries, please contact DIYmalls support. You can typically find a "Sold by DIYmalls" link near the product purchase button. Clicking this link and then selecting "Ask a question" will allow you to reach out for support.