gpsmon.py

from gps3 import gps3

gps_socket = gps3.GPSDSocket()
data_stream = gps3.DataStream()
gps_socket.connect()
gps_socket.watch()

for new_data in gps_socket:
  if new_data:
    data_stream.unpack(new_data)
    if data_stream.TPV['lat'] == 'n/a' :
      continue
    print data_stream.TPV['time'] ,",", data_stream.TPV['lat'],",",data_stream.TPV['lon']
    break

output example

-----------------
bssid / frequency / signal level / flags / ssid
c8:5a:9f:46:8a:6c       2462    -63     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       F660A-tXKQ-G
10:6f:3f:f3:0f:72       2412    -22     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       URoad-6F1CCC
00:1c:7b:fb:21:9c       2437    -73     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       BCW710J-C77AE-G
38:f8:5e:73:c1:23       2412    -85     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       HUMAX-3C116
7c:8f:de:57:83:5a       2462    -87     [WPA-PSK-CCMP][WPA2-PSK-CCMP][WPS][ESS] 7C8FDE57835B-2G
4c:e6:76:70:2d:48       2437    -88     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       4CE676702D48
2021-04-23T13:47:23.000Z , 35.********** , 139.*********
-----------------
bssid / frequency / signal level / flags / ssid
c8:5a:9f:46:8a:6c       2462    -65     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       F660A-tXKQ-G
10:6f:3f:f3:0f:72       2412    -19     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       URoad-6F1CCC
00:1c:7b:fb:21:9c       2437    -76     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       BCW710J-C77AE-G
38:f8:5e:73:c1:23       2412    -85     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       HUMAX-3C116
7c:8f:de:57:83:5a       2462    -91     [WPA-PSK-CCMP][WPA2-PSK-CCMP][WPS][ESS] 7C8FDE57835B-2G
4c:e6:76:70:2d:48       2437    -88     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       4CE676702D48
94:09:37:41:7b:5d       2412    -87     [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]       HUMAX-17B50
2021-04-23T13:47:34.000Z , 35.********** , 139.********
-----------------

scan.service

[Unit]
Description=GPS/SSID Scanner
After=syslog.target

[Service]
Type=simple
WorkingDirectory=/home/pi
ExecStart=/home/pi/scan.sh
TimeoutStopSec=5
User=pi
[Install]
WantedBy = multi-user.target

scan.sh

#!/bin/bash

FILENAME=`TZ=-9 date "+%Y%m%d_%H%M%S"`
mkdir scanlog
while true
do
        wpa_cli -i wlan0 scan
        sleep 10
        echo "-----------------" >> scanlog/${FILENAME}.txt
        wpa_cli -i wlan0 scan_result >> scanlog/${FILENAME}.txt
        python /home/pi/gpsmon.py >> scanlog/${FILENAME}.txt
done