Xexun DDX04 - Failed process to get geolocation location, based on mac address and signal strength.

Andri Putra2 years ago

Hi,

Here a result of my API Device Status for Xexun DDX04 Devices

[
    {
        "id": 10798,
        "attributes": {
            "index": 223,
            "rssi": 21,
            "charge": false,
            "batteryLevel": 18,
            "distance": 0,
            "totalDistance": 11584684.23,
            "motion": false
        },
        "deviceId": 48,
        "protocol": "xexun2",
        "serverTime": "2023-05-09T08:42:16.263+00:00",
        "deviceTime": "2023-05-09T08:42:00.000+00:00",
        "fixTime": "2023-05-04T05:33:00.000+00:00",
        "outdated": false,
        "valid": true,
        "latitude": 1.1135616302490234,
        "longitude": 104.0654296875,
        "altitude": 0,
        "speed": 0,
        "course": 0,
        "address": null,
        "accuracy": 0,
        "network": {
            "radioType": "gsm",
            "considerIp": false,
            "wifiAccessPoints": [
                {
                    "macAddress": "ac:84:c6:81:0c:31",
                    "signalStrength": 210
                },
                {
                    "macAddress": "74:83:c2:3a:c3:c0",
                    "signalStrength": 204
                },
                {
                    "macAddress": "9c:9d:7e:28:0a:7b",
                    "signalStrength": 200
                },
                {
                    "macAddress": "28:d1:27:6f:40:02",
                    "signalStrength": 187
                },
                {
                    "macAddress": "1e:7d:22:40:47:2a",
                    "signalStrength": 186
                },
                {
                    "macAddress": "74:83:c2:3a:c3:d3",
                    "signalStrength": 184
                },
                {
                    "macAddress": "74:83:c2:3a:c1:ff",
                    "signalStrength": 181
                }
            ]
        }
    }
]

I have failed to get location if i use wifi positional geolocation.

after I checked the API in the network -> WifiAccessPoints -> section

the format of the signalStrength data obtained is not in accordance with the provisions of google maps, the format of the signalStrength obtained should be -dbm.

so I tried to process the raw data using postman and post data to google maps api, by converting signalstreng to dbm format, and I managed to find my location point.

            "wifiAccessPoints": [
                {
                    "macAddress": "ac:84:c6:81:0c:31",
                    "signalStrength": -83      // = 127 - 210= -83
                },
                {
                    "macAddress": "74:83:c2:3a:c3:c0",
                    "signalStrength": -77  // = 127- 204 = -77
                },

     and so on.....

how do i do that in traccar's backend? please help, I really appreciate it.

Anton Tananaev2 years ago

This should fix it:

https://github.com/traccar/traccar/commit/2088a59da55e581391f9a768003b68baca467007

Andri Putra2 years ago

Hi Thanks for help,

Unfortunately, the signal strength data is still not in accordance with the standard format.

same as before

"network": {
"radioType": "gsm",
"considerIp": false,
"wifiAccessPoints": [
{
"macAddress": "a0:36:bc:4a:2f:88",
"signalStrength": 228
},
{
"macAddress": "74:83:c2:3a:c3:d3",
"signalStrength": 210
},
{
"macAddress": "74:83:c2:3a:c3:c0",
"signalStrength": 187
},

I looked using the ddx04 debugger, I saw the MAC address and the signal strength is correct.

00> [0628132108:080][37463299|1][MotionAlarm_timing_Task|451]State 0C, Run 0|0, Static 60|0, Thwarted 60|5, Fall 0|5
00> +CWLAP:(-30,"a0:36:bc:4a:2f:88")
00> +CWLAP:(-71,"74:83:c2:3a:c3:d3")
00> +CWLAP:(-72,"74:83:c2:3a:c3:c0")
00> +CWLAP:(-74,"50:2c:c6:99:aa:b0")
00> +CWLAP:(-74,"9c:9d:7e:28:0a:7b")

signal strength format is still wrong, so the network geolocation process is error. I believe if format signal strength true, the geolocation can work normaly.

2023-06-28 13:31:30  INFO: [T54b54e56: xexun2 < 182.2.5.140] faaf0014000d8639210374632990006ad44a0100673d649bc55815803282020aa036bc4a2f88df7483c23ac3d3d09c9d7e280a7bb6502cc699aab0b51e7d2240472ab228d1276f4002af7483c23ac1ffaf5c546d626fe0a8fcbcd165c8e5a7fcbcd165c8e4a400000003421000000000000040a51e80000000000000faaf
2023-06-28 13:31:30  INFO: [T54b54e56: xexun2 > 182.2.5.140] faaf0014000d86392103746329900001fffe01faaf
2023-06-28 13:31:31  WARN: Geolocation network error - HTTP 404 Not Found - NotFoundException (...)

Thank you for your support.

Anton Tananaev2 years ago

Looks like I fixed cell info, but not wifi. Try this:

https://github.com/traccar/traccar/commit/3952b3445d96d91f87d6a427ba10a86907cb0fea