Get cellular data usage

Networking Solutions
1

Hi community,

I want to set SMS alert for every 2GB cellular data usage.
This function is not yet featured.
I use RUT361 R07.19.4.
I intend to make a shell script for this task. However, getting data usage from /sys/class/net/wwan0/statistics/tx_bytes and /sys/class/net/wwan0/statistics/rx_bytes is incorrect.
It does not match data used in Data limit or realtime data/mobile usage as picture below.
where can I get the correct data usage?

Thank you.

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3

Greetings, @johnny.v,

Welcome to Teltonika Community!

Could you please clarify the alert logic a bit?

  • Should the router send an alert every time 2 GB of data is used?
  • Is the data calculated as combined TX/RX?
  • From your screenshots, I can see that the limit reset period is set to “day.” Can the limit exceed 2 GB more than once per day?

This information will help me investigate the issue further.

Please note that custom script writing is beyond our technical support scope; however, we can provide you with some general guidance.

I look forward to your reply.

Best wishes,
V.

4

Hi Vilius,

The goal is to get a notification for every amount of data used; in my case, it is 2GB, but it should be any value. I want to receive an update notification and top up my data allowance if needed.

The data limit feature does match my goal

Exp: The data bank: x GB, regular notification: y GB.

  • 1st notification: RUT has used more y GB of data, total used y GB, data left (x - y) GB.
  • 2nd notification: RUT has used more y GB of data, total used 2y GB, data left (x-2y) GB.

My idea: build a shell script and add it to crontab for a regular check (15 min). Calculate the data used and compare it to the first run of the script; if the data used < y, no SMS alert else update data used, total data used, and send notification (SMS).

I combined /sys/class/net/wwan0/statistics/tx_bytes and /sys/class/net/wwan0/statistics/rx_bytes as the data source; however, they do not reflect the actual data.

The question is: how can I get the values needed to calculate the data?

BTW, I also prefer sending SMS notifications to multiple recipients (customers and Operators) with the current data limit feature.

5

Hello,

To retrieve the data usage information, you can utilize the API. Once a data limit is configured, you can obtain both the limit and the amount of data used via the following API endpoint:

/api/data_limit/status

The output should look similar to the example shown below.

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Please note that both the data limit and the usage values are displayed in bytes.

You can find more details in our API documentation here:
https://developers.teltonika-networks.com/reference/rutx11/7.20.3/v1.12.1/data-limit#get-data_limit-status

If you have any additional questions, feel free to let me know.

Best regards,
V.