Improvements to Browan Tab Object locator / Tab-all

[mfalkvidd]

Add support for

• whether the device is charging or not
• battery measurement fault
• whether the button was pressed
• whether the device is moving or stationary
• gnssOk (status bit 4: 1 - GNSS error, 0 - GNSS OK)

Manuals:

• https://www.browan.com/download/DBk/stream
• https://www.thethingsnetwork.org/forum/uploads/short-url/pyAskbn2PnxI1eG3vHOED9Mckki.pdf
• https://iot-shop.de/web/content/8056?access_token=df74376f-a349-4e91-98e8-10588ed91e0f&unique=undefined&download=true
• https://trello-attachments.s3.amazonaws.com/5d7a8b1edb90646852c8e5c0/5d855fe8c619611862b35b09/dd5ca770e27d82a34bc4d1c9cb5068b2/RM_Object_Locator(S)_20200706_(BQW_02_0021.pdf

[Wlanfr3ak]

For me its only working with removed 3 lines from your PR with this code AND remove position from the data fields to let ttn understand its the location from the device and for ttnmapper!:

`
function decodeUplink(input) {

var data = {
    "bytes": input.bytes, // original payload
    "port" : input.fPort  // lorawan port
};
var batteryStatus = input.bytes[1];


switch(batteryStatus){
    case 0:
        
        data.charging = true;
        data.batteryFault = false;
        break;
    case 255:
        
        data.batteryFault = true;
        break;
    default:
        data.charging = false;
        data.batteryFault = false;
        battery = input.bytes[1] & 0x0f;
        battery = (25 + battery) / 10;
        data.battery = battery;
        capacity = input.bytes[1] >> 4;
        capacity = (capacity / 15) * 100;
        data.capacity = capacity;
}


temperature = input.bytes[2] & 0x7f;
temperature = temperature - 32;
data.temperature = temperature;

if (input.fPort === 100) { // Door & Window Sensor

    openingStatusTime = (input.bytes[4] << 8) | input.bytes[3];

    
    openingStatusCount = ((input.bytes[7] << 16) | (input.bytes[6] << 8)) | input.bytes[5];

   
    openingStatus = input.bytes[0] & 0x1;
    if (openingStatus === 1) {
        openingStatusOpen = true;
    } else {
        openingStatusOpen = false;
    }

    data.openingStatusTime = openingStatusTime;
    data.openingStatusCount = openingStatusCount;
    data.openingStatusOpen = openingStatusOpen;
}
 else if (input.fPort === 136) { // Object Locator
    
    if ((input.bytes[0] & 0x8) === 0) {
        positionGnssFix = true;
    } else {
        positionGnssFix = false;
    }
    
    positionAccuracy = input.bytes[10] >> 5;
    positionAccuracy = Math.pow(2, parseInt(positionAccuracy) + 2);

   
    input.bytes[10] &= 0x1f;

    if ((input.bytes[10] & (1 << 4)) !== 0) {
      input.bytes[10] |= 0xe0;
    }

    
    input.bytes[6] &= 0x0f;

  
    positionLatitude = ((input.bytes[6] << 24 | input.bytes[5] << 16) | input.bytes[4] << 8 ) | input.bytes[3];
    positionLongitude = ((input.bytes[10] << 24 | input.bytes[9] << 16) | input.bytes[8] << 8 ) | input.bytes[7];
    positionLatitude = positionLatitude / 1000000;
    positionLongitude = positionLongitude / 1000000;

    data.gnssfix = positionGnssFix;
    data.latitude = positionLatitude;
    data.longitude = positionLongitude;
    data.accuracy = positionAccuracy;
}

return {
    data: data,
    warnings: [],
    errors: []
};

}`