Gateway with GPS module (legacy)

LoRaWAN Gateway with GPS module NEO-6M GYNEO6MV2 (legacy, TTN v2)

Wiring:


RXT on the GPS goes to TXD on the PI
TXD on the GPS goes to RXT on the PI

GPS — RPI

TX — GPIO15-RX (pin10)
RX — GPIO14-TX (pin8)
Ucc — 3.3V (pin 1)
GND — GND
PPS — pin 19 iC880

 

Tested antennas:

GPS/GLONASS antenna, with thread, SMA(m), RG174/3m
e-shop		 GPS antenna EA200, SMA(m), RG174/5m
e-shop

Configuration:

#in raspi-config a deny serial
# in /boot/cmdline.txt set speed serial0 to 9600
reboot
apt-get install gpsd gpsd-clients
systemctl stop gpsd.socket
systemctl disable gpsd.socket
stty -F /dev/serial0 9600 (rucni nastavewni rychlosti)
gpsd /dev/serial0 -F /var/run/gpsd.sock
chmod a+rw /dev/serial0
cgps -s

debug:
cat /dev/serial0

gpsmon /dev/serial0

https://raspberrypi.stackexchange.com/questions/30183/gpsd-data-receiving-issues

in RPI3: https://circuitdigest.com/microcontroller-projects/raspberry-pi-3-gps-module-interfacing

vi /boot/config.txt

dtparam=spi=on
dtoverlay=pi3-disable-bt
core_freq=250
enable_uart=1
force_turbo=1

sudo cp boot/cmdline.txt boot/cmdline_backup.txt
sudo nano /boot.cmdline.txt

dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles

sudo systemctl stop serial-getty@ttyS0.service
sudo systemctl disable serial-getty@ttyS0.service
sudo systemctl enable serial-getty@ttyAMA0.service

possible enable:
sudo systemctl enable serial-getty@ttyS0.service
sudo systemctl start serial-getty@ttyS0.service

* if you have problem to access to AMA0 socket, try following:
sudo systemctl stop serial-getty@ttyAMA0.service
sudo systemctl disable serial-getty@ttyAMA0.service
sudo chmod a+rw /dev/ttyAMA0

RaspberryPi 3 + GPS: We couldn’t start this set, otherwise RPI 2B + GPS  is working

TTN script modification:

  1. last row in /opt/ttn-gateway/start.sh don’t run poly_pkt_fwd but gps_pkt_fwd.
  2. copy to global_conf.json local settings in local_conf.json
  3. modify:
"gateway_conf": {
"gateway_ID": "xxxxxxxxxx",
"gps": true,
"beacon": false,
"monitor": false,
"upstream": true,
"downstream": true,
"ghoststream": false,
"radiostream": true,
"statusstream": true,
"server_address": "router.eu.thethings.network",
"serv_port_up": 1700,
"serv_port_down": 1700,
"servers":
[ { "server_address": "router.eu.thethings.network",
"serv_port_up": 1700,
"serv_port_down": 1700,
"serv_enabled": true } ],
/* adjust the following parameters for your network */
"keepalive_interval": 10,
"stat_interval": 30,
"push_timeout_ms": 100,
/* forward only valid packets */
"forward_crc_valid": true,
"forward_crc_error": false,
"forward_crc_disabled": false,
/* GPS configuration */
"gps_tty_path": "/dev/ttyAMA0",
"ngrok_path": "/usr/bin/ngrok",
"system_calls": ["df -m","free -h","uptime","who -a","uname -a"],
}