Two problems: Battery Level problem with Coban TK102-2-V1.06 + small problem with reverse geocoding...

Hello everyone.
I read the forum and found no solution.
I have a Coban TK102-2-V1.06 device (port 5001).
In the traccar server application I am trying to add an attribute and an alarm about the battery level.

I found many solutions on the forum, but none of them works (six-step scale, device voltage etc.) to show me the battery level in percent.

After calling, the device sends feedback to the phone with a percentage of the battery level. Information is sent in the following values: 100, 75, 50, 25, 5 %.

So I combined the use of the following attributes and alarms:

1. 06=100% 05=80% 04=60% 03=40% 02=20% 01=10%

2. 4.20v = 100%
   4.03v = 76%
   3.86v = 52%
   3.83v = 42%
   3.79v = 30%
   3.70v = 11%
   3.60v > 0%

3. if (battery <=4.50 && battery >=3.65) { null; } else {'Help';}
   However, none of them work ...

Here are my logs:

2021-04-15 10:48:39  INFO: [26d5e546: gps103 < 10.85.90.163] HEX: 696d65693a3836343839343033303434393232382c747261636b65722c3231303431353038343833372c2c462c3038343833372e30302c412c353330312e32303737342c4e2c30313833372e38353531
2021-04-15 10:48:39  INFO: [26d5e546: gps103 < 10.85.90.163] HEX: 322c452c302e3030302c303b
2021-04-15 10:48:39  WARN: Geocoding failed - HTTP 301 Moved Permanently - RedirectionException (...)
2021-04-15 10:49:56  INFO: [95fa4b3b: gps103 < 31.0.88.92] HEX: 696d65693a3836343839343033303435343733312c747261636b65722c3231303431353038343935342c2c462c3038343935342e30302c412c353330312e32313338312c4e2c30313833372e38383634392c452c302e3030302c303b
2021-04-15 10:49:56  WARN: Geocoding failed - HTTP 301 Moved Permanently - RedirectionException (...)
2021-04-15 10:49:56  WARN: Attribute computation error - org.traccar.handler.ComputedAttributesHandler.computeAttribute@102![0,12]: 'batteryLevel < 10? 'lowBattery' : null;' undefined variable batteryLevel - Variable (... < ComputedAttributesHandler:102 < *:113 < BaseDataHandler:27 < ... < *:29 < ... < *:29 < ...)

I noticed that after "f" there is no value of any kind ...

PS. I tried to set up reverse geocoding and it didn't work out either ... However, I don't want to give up and I learn every day thanks to the forum and trial and error methods.

    <entry key='geocoder.enable'>true</entry>
    <entry key='geocoder.type'>gisgraphy</entry>
    <entry key='geocoder.url'>http://services.gisgraphy.com/reversegeocoding/search</entry>

I also added a button "show address"...
I don't use the show address option too often. I saw that google has limits, but I can not set it ... and where to get the key ... if I exceed the limit, how will I know about it and how will I have to pay for it?

Do you have any ideas? Thank you very much for every suggestion. Have a nice day.

Logs actually point out both issues:

1. Computed attribute error is pretty self explanatory:

undefined variable batteryLevel

1. Gisgraphy redirects URL, so you have to update the URL.

Hi Anton, thank you very much for your commitment and answer.
Unfortunately I don't understand solution number "1".
Can you explain it to me somehow in detail?
Indicate what exactly they are making a mistake in and advise on an attribute ...
Unfortunately, I am a beginner and a wandering user, and you are a Master.
As for solution number "2", I will find the appropriate URL in a moment.
Unless you can advise something else? I will have a max. 1000 per month.
Regards, hold on and THANK YOU again.

1. The attribute you are trying to use in one of your expressions is not available, so it's failing.
2. Looks like you just need to change from HTTP to HTTPS, but maybe there are some other changes.

Hi Anton,
I solved problem number 2 on my own. Everything works, which made me very happy.
Unfortunately, I don't understand your answer to problem number 2. It's a bit of a mystery. Do you know what attribute I would have to use?
Thank you for every tip. I do not understand why in the logs, after "f" (which applies to the battery) there are no values, data ...
PS. I am surprised that apart from you, I cannot see the involvement of other forum members. Detriment. It needs to be changed :-)
Take care.

fresh logs:

imei:864894030440000,tracker,210422053943,,F,053943.00,A,5301.16999,N,01837.86799,E,2.149,166.03;

Hi. I contacted the manufacturer and it turns out that there is no information regarding the battery in the gprs information that coban tk102-2 is sending. Strange, since the device sends this information via SMS.
Hence my question. Is it possible to add somewhere in the program such functionality that, using a SIM card in the router, make a connection to the device, and then the device would send feedback to this card?
I think it is a good solution for devices without gprs data information.
I greet you. I am counting on a reply because I can see that the forum is slowly dying out. A pity as it is a very useful tool for this amazing software.

Is it possible to add somewhere in the program such functionality that, using a SIM card in the router, make a connection to the device, and then the device would send feedback to this card?

Anything is possible, but I don't think we would implement something like that any time soon. We have a lot of more important tasks to work on. It seems like your problem can easily be solved by getting a more functional device.