Automatic reboot of TP-LINK MR3020 router via ESP8266 - how to get TOKEN?

Question

Hello to those interested in the topic of rebooting the router to which our ESP8266 or ESP32 is connected over WIFI. I have attempted to automate the router control via ESP8266, which works as WIFI to the ES5000 solar inverter and sends electrical data to the PV MONITOR server. And the problem...

xury · Answer

I think you are taking the wrong approach. Firstly if your router crashes then you won't connect to the ESP. Secondly it might be better than a software reboot to just take power off the router with a relay for a while. Thirdly this router can run on openwrt and this simplifies things, as you can make a script that reboots the router e.g. when there is no ping to google DNS.

futek2 · Answer

Hello.
Thanks for your interest in the subject.
I have already tested it .
I even uploaded the software from the Polish site but something does not support the E3372 modem very well.
The router works because I log into it via the web . The problem is that I have it in the attic of the building to have a better signal to the modem E3372 and control the voltage is again additional circuits.
But people write that it can be done, perhaps on an older version of the software without token would be easy.
For now I pause to make up my mind.
When I will go through with the topic again, I will manage to do something and will share with others here on the forum.
Because maybe they are interested.
I am of good opinion that the topic can be handled together.
A similar topic has already been described.

https://www.elektroda.pl/rtvforum/topic941139.html

https://www.elektroda.pl/rtvforum/topic1549110.html

https://gist.github.com/vicwomg/9b0bc6f1ea22e08379651a36877e0420

And perhaps this will support more TP_LINK router models.

Greetings.
Futek2

Added after 3 [hours] 20 [minutes]:

Searching the web I came across this forum

http://www.jfwhome.com/2012/06/18/reboot-tp-l...ter-remotely-or-automatically/comment-page-1/

But they also have a problem, because on new versions it doesn't work, because you have to read the session_id.
But on older versions of the software it worked.
I am positive that this will be solved and it will work remotely.

Futek2

Ibuprom · Answer

. If you are writing about Gargoyle it is no wonder that miracles happen. I've never had this software work stably in contrast to the images from openwrt.org, although the fact is that there you have to do more manually - but for almost everything you will find a working tutorial. And as the previous speaker wrote - cut the power, because usb support and general crashes are usually hardware-based, not software-based - and commands rarely help here. Besides - the problem is not with the stability of the hardware as such, but with poor power supply/low power efficiency of the usb modem - that's why the router crashes. Often the router needs to be reworked (remove/modify power switching keys, improve power filtering) and use a better power supply than the one supplied. Then no woo-doo with resets is needed.

futek2 · Answer

After a few hours of pause, I manage to read this token.
And this is such a line from the windows command line:

@curl --user admin:admin http://192.168.1.1 > sesion_id.txt

.

After sending to the router, the response is saved in the file sesion_id.txt .
A part of this answer looks like this with the fragment what is needed for further processing.

<script type="text/javascript">
var session_id = "rKtwZJBJi7";
</script>

And the selection of the token I do like this or this needed part rKtwZJBJi7

Now all the way to the windows command line

@curl --user admin:admin http://192.168.1.1 | grep session_id  | grep var | cut -c 19- | cut -c 1-10   > tok.txt

The lines above can be saved as a bat file.
The attached file contains the necessary programs, which must be in the same directory if someone wants to test it on his router.
But it is already a step forward.
Maybe now it will be possible to reboot the router.

I am of the opinion that once this is done with windows it will go downhill.

Best regards.
Futek2

Anonymous · Answer

. I think you have an error in logic here. You should execute it like this: - logging in (send GET without session_id) - receive what the client returned - parsing, looking for session_id - send a GET request restarting with session_id For an example, see how they parse the XML. The snippet you are interested in starts with The `getArrivals` function first makes... -> As an aside - I also think you should take care to improve the power supply or remove interference from the network that may be contributing to your problem.

futek2 · Answer

Hello to those interested in the topic.
Thanks to kol Erbit for the info you sent.
Today I slept in and read the forum again.

http://www.jfwhome.com/2012/06/18/reboot-tp-l...ter-remotely-or-automatically/comment-page-1/

Guys have done a lot of testing and based on their results I searched for an older version of the software for MR3020 V1.0 and succeeded in the hamster is attached and in addition has a Polish menu.
In this version there is no SESION_ID and it works with this line below from windows level is attached as .bat file

@curl --referer http://192.168.1.1/ --user admin:admin http://192.168.1.1/userRpm/SysRebootRpm.htm?Reboot=Reboot > reboot.txt

This works fine with the previously attached files, which must be in the same directory.

In the reboot.txt file you can see how the MR3020 responds.

Now it is clear that it works, it is just a matter of writing the code to make it work with the ESP8266.

I think I will still have some support if they have a problem with the code.

Futek2

krzbor · Answer

And why not do it as @xury suggested? After all, all you need to do is have the ESP (which also connects via WiFi to the network) query DNS or NTP, or even communicate with the PV MONITOR server every specified time (e.g. 1 minute). If it doesn't get a response it will trigger a relay for 30 seconds, which will cut off the current to the router. Here it is a good idea to use a relay with an NC output, as it will normally be shorted almost all the time. Such an ESP can do more, e.g. when connectivity returns, record information in the log or send a restart email.
The sequence could be as follows:
1. connectivity check every 1 minute.
2. no communication starts check every 10 sec
3. after 6 attempts to fail - cut power to the router for 30 seconds
4. wait for reboot (need to measure time e.g. 5 minutes).
5. go to 1.

futek2 · Answer

The router is in the attic and the ESP8266 by the inverter is about 7 metres away. For now I have other things to do, maybe in the evening I will do something else. Because the test is done and it works. As for the suspension of the connection to the Internet, my observations are such days that it happens when, for example, at night it rains. P.p. the modem changes the connection with the BTS looking for a station and finally it hangs up and from the router side everything is fine. Maybe I will approach how to do a self shutdown of the E3372 modem that was similar to the reboot of the MR3020.
But it will take some time because the modem also sends a token.
Futek2

krzbor · Answer

This in the loft make a second ESP that exclusively monitors the connection (such a watchdog). I even found something like this: Link .

futek2 · Answer

Hello. Thanks kol krzbor for the good advice. But I like things simple. Just require knowledge, skill and patience.... I have a good hope that it will work without additional equipment. And colleagues who know how to program ESP8266 will help for the good of the community because they have shared their knowledge more than once, which was helpful to me. I am grateful to them because I learned a lot and many useful simple projects were created. Because my programming education started with QBASIC from DOS then there was no windows yet and the beginning was ATARI but then I was just over 20 years old. Greetings. Futek2

futek2 · Answer

Hello to those interested in the topic.
After many tests before, everything went well and is tested many times and the remote reset of the TP_LINK computer with MR3020 is working.
Below is the code for the procedure and attached is the PINGER library which needs to be manually installed into the ARDUINO IDE - zip file attached.
Add the following lines at the beginning of the code:

#include <Pinger.h> .

Below is the code for the procedure to remotely reset TP_LINK _MR3020 to the ESP8266 module.


void TP_LINK_REBOOT()
{
    Pinger pinger;
// dane logowania do ustwien routera - zmienic na swoje potrzeby
String   user="admin";
String   login="admin";
const char* TP_LINK = "192.168.1.1";

 if (WiFi.status() == WL_CONNECTED) {
  Pinger pinger;
  int responseTime = pinger.Ping(IPAddress(8, 8, 8, 8));
  if(responseTime == -1)  // tej wartosci nie zmieniac
    {
     Serial.println("BRAK POLACZENIA Z INTERNETEM");
      delay(500);
        HTTPClient http; 
        delay(500);
        Serial.println("RESET RUTERA MR3020"); 
        Serial.print("[HTTP] begin...\n");
        http.begin("http://"+user+":"+login+"@"+TP_LINK+"/userRpm/SysRebootRpm.htm?Reboot=Reboot");
        int httpCode = http.GET();
        http.end();
         }
      else 
       {
       Serial.println("POLECZENIE Z INTERNETEM CZYNNE");
       Serial.print(responseTime);
       Serial.println("ms.\n");
      }
     }
    }

.

Please find attached the software for the router TP-LINK MR3020 with which this code for remote reset works, because it is a version that does not send the TOKEN when logging in.
I think that the code will also work with other TP-LINKs with older versions of the software.
But this should be checked individually on the router you own.

If I have time, I will write the code to read TOKEN so that it can work with newer software versions of TP_LINK routers.
Thanks to everyone for their advice and I think improvements are on the way.

Please do not hesitate to ask for comments and suggestions.

Best regards.
Futek2

khoam · Answer

What happens if the http.begin() function returns false i.e. does not execute correctly?

futek2 · Answer

Hello to those interested in the topic .
Thanks for the question kol. khoam doing tests every time the command was executed. So I have simplified the code and if it is not executed in the first time, then in the second time.
From this I have received, the response looks like it sends the html code of the whole page. So I think this will allow you to select the token and read it after logging in and then only send the command to reboot the router. With more time I will work on improving and reading this token so that it also works with newer versions of the software in TP_LINK.
For the time being, this solves my problem, the code that I have tested has been simplified in its entirety, and this is what the part with the reading of the response would look like:

int httpCode = http.GET();
        Serial.print("[HTTP] GET...\n");
        if(httpCode > 0)
        {
        Serial.printf("[HTTP] GET... code: %d\n", httpCode);
           if(httpCode == HTTP_CODE_OK)
           {
                String payload = http.getString();
                Serial.println(payload);
            }
          } 
          else
          {
             Serial.printf("[HTTP] GET... failed, error: %s\n",        
            http.errorToString(httpCode).c_str());
          }
        http.end();

.

The problem is partially solved and after the exchange of the software in the TP LINK MR3020 to an older version solves the problem.
And since a few days everything is fine, but it would be worthwhile to improve the code.

Regards.
Best regards. Futek2

Automatic reboot of TP-LINK MR3020 router via ESP8266 - how to get TOKEN?

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