113 lines
3.0 KiB
Markdown
113 lines
3.0 KiB
Markdown
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# NEO-6M GPS Module Setup Guide
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## Overview
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The NEO-6M is a cost-effective GPS module that provides reliable positioning data for the Aniker anchor alarm system. This guide covers the basic setup and configuration of the NEO-6M with the ESP32.
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## Module Features
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- High sensitivity: -161 dBm tracking
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- Time-To-First-Fix:
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- Cold start: 27s
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- Hot start: 1s
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- Position accuracy: 2.5m CEP (Circular Error Probable)
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- Velocity accuracy: 0.1m/s
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- Operating temperature: -40°C to 85°C
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## Physical Setup
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### Power Requirements
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- Input voltage: 3.3V DC
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- Current consumption: ~45mA at continuous operation
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- Backup power (optional): 2.0V to 3.6V for faster satellite acquisition
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### Pin Connections
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1. **Power Pins**
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- VCC → ESP32 3.3V
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- GND → ESP32 GND
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2. **Communication Pins**
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- TX → ESP32 GPIO16 (RX)
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- RX → ESP32 GPIO17 (TX)
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### Antenna Considerations
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- The module comes with a ceramic patch antenna
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- Place the antenna facing upward with clear view of the sky
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- Avoid metal objects directly above the antenna
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- Keep antenna away from sources of interference
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## Initial Testing
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### LED Indicators
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- Power LED: Should be constantly on
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- Signal LED: Will blink when receiving data from satellites
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### Expected Behavior
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1. When first powered on, the module will begin searching for satellites
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2. Initial position fix may take 30-60 seconds in optimal conditions
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3. Signal LED will begin blinking once satellites are acquired
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## Troubleshooting
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### Common Issues
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1. **No Power LED**
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- Check 3.3V power connection
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- Verify ground connection
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- Check for short circuits
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2. **No Signal Reception**
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- Ensure clear view of sky
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- Check antenna connection
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- Move away from sources of interference
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- Try outdoor testing first
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3. **Intermittent Data**
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- Check wire connections
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- Verify baud rate settings
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- Check for interference sources
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### Testing Tips
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- First test outdoors with clear sky view
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- Allow up to 5 minutes for first fix
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- Use serial monitor to verify data reception
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- Verify correct UART configuration
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## Software Configuration
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### Default Settings
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- Baud rate: 9600bps
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- Update rate: 1Hz
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- NMEA messages: GGA, RMC, GSA, GSV
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### Serial Communication
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```rust
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// Example configuration in Rust
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let config = uart::config::Config {
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baudrate: 9600,
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data_bits: uart::config::DataBits::DataBits8,
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parity: uart::config::Parity::ParityNone,
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stop_bits: uart::config::StopBits::STOP1,
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};
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```
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## Performance Expectations
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### Typical Performance
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- Time to first fix: 30-60 seconds
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- Position accuracy: 2.5m (open sky)
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- Update rate: 1Hz
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- Operating temperature: -40°C to 85°C
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### Environmental Factors
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- Performance degrades under cloud cover
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- Indoor operation is not reliable
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- Metal objects can cause interference
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- Marine environment considerations:
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- Salt spray protection needed
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- Weatherproofing recommended
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- Stable mounting required
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## Future Improvements
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- [ ] Add power saving modes
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- [ ] Implement faster update rates
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- [ ] Add configuration interface
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- [ ] Optimize for marine use
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