The current Stratux 1.6r1-eu026 firmware version contains a GPS bug that affects users with T-Motion or T-Beam GPS modules.
The Problem
When connecting Stratux to a T-Motion or T-Beam device, the web interface displays:
GPS hardware: Serial port (not communicating)
This prevents GPS data from being received, making Stratux unable to provide position information to your EFB app.
Why Does This Happen?
The issue is related to how the eu026 firmware handles serial communication with certain GPS modules. The T-Motion and T-Beam devices use a specific baud rate and protocol that isn't properly initialized in this firmware version.
Affected Devices
- T-Motion: LilyGO TTGO T-Motion
- T-Beam: LilyGO TTGO T-Beam
- Other SoftRF-compatible devices with serial GPS output
The Fix
There are two ways to resolve this issue:
Option 1: Configuration Fix
1. SSH into your Stratux:
```bash
ssh pi@192.168.10.1
# Default password: raspberry
```
2. Edit the Stratux configuration:
```bash
sudo nano /etc/stratux.conf
```
3. Add or modify the GPS serial settings:
```
{
"GPSEnabled": true,
"GPSType": "Serial",
"GPSBaud": 38400
}
```
4. Save and reboot:
```bash
sudo reboot
```
Option 2: Apply the Patch File
A community-provided patch file is available:
1. Download the GPS fix .sh file
2. Connect to Stratux web interface
3. Go to Settings → Developer
4. Upload and execute the patch file
5. Reboot Stratux
Verifying the Fix
After applying the fix:
1. Check the Stratux web interface
2. GPS status should show "GPS hardware: Serial port (connected)"
3. You should see satellite count and position data
4. Verify GPS data appears in your EFB app
Alternative: Use USB GPS
If the serial GPS continues to cause issues, consider using a USB GPS receiver:
- GlobalSat BU-353S4
- VK-162 USB GPS
- Any UBlox-based USB GPS
USB GPS modules generally work without configuration and are less prone to compatibility issues.
Prevention
When updating Stratux firmware:
- Check the release notes for known issues
- Wait a few days after release to see community feedback
- Keep backups of working configurations
Looking Forward
The eu027 release addresses this GPS issue along with other improvements. Consider upgrading when it becomes available.
Related Resources
- Internal GPS Module for Stratux - Browse GPS modules and accessories
- Stratux First Time Setup - Complete setup instructions
- How to Install Stratux Firmware - Flash the latest firmware
- Stratux FAQ - Complete Stratux technology guide