GPS Module: Difference between revisions
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[[Image:UBlox_GPS_Module.jpg|top|thumbnail|uBlox GPS Board]] | [[Image:UBlox_GPS_Module.jpg|top|thumbnail|uBlox GPS Board]] | ||
* Based on [https://www.u-blox.com/ | * Based on [https://www.u-blox.com/en/product/neo-6-series uBlox NEO-6M-0-001] | ||
* 5V operation (3.3 V regulator onboard) | * 5V operation (3.3 V regulator onboard) | ||
* UART: 9600 bps 8N1, TTL levels buffered by 220R resistors | * UART: 9600 bps 8N1, TTL levels buffered by 220R resistors | ||
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systemctl start gpsd | systemctl start gpsd | ||
Use gpsmon to monitor GPS data | Use gpsmon to monitor GPS data, or xgps | ||
=== PPS === | === Pulse Per Second (PPS) === | ||
dnf install pps-tools | dnf install pps-tools | ||
Revision as of 07:22, 27 February 2023
HW-595 Board
- Based on uBlox NEO-6M-0-001
- 5V operation (3.3 V regulator onboard)
- UART: 9600 bps 8N1, TTL levels buffered by 220R resistors
- U.FL connector supplies 3.3 V to active antenna
Board pinouts:
| Pin | Function | Description |
|---|---|---|
| 1 | PPS | 1 pulse/s, synchronised at rising edge, length 100 ms |
| 2 | RXD | UART input |
| 3 | TXD | UART output |
| 4 | GND | Ground |
| 5 | VCC | 3.3 - 5 V |
PPS can be reconfigured as a frequency reference:
- Send PPS to UART via CTS
- 0.25 Hz - 10 MHz
- Configure in u-Center here
- Output has high frequency accuracy, but suffers from jitter except at a few specific frequencies
Software
U-Center
GPSD
Enable and start gpsd. Should auto-detect which UART is GPS connected to, etc:
systemctl enable gpsd systemctl start gpsd
Use gpsmon to monitor GPS data, or xgps
Pulse Per Second (PPS)
dnf install pps-tools modprobe pps_ldisc ldattach 18 /dev/ttyS0
Check PPS signal:
ppstest /dev/pps0 ppscheck /dev/ttyUSB0