iButton on FMB641

the FMB641 reads the iButton with 5 zeros but with 6 zeros it reads it as a temperature sensor, any help with my problem?

Also, same problem with FMC650.

Hello @John2,

I hope you are doing well. Kindly try to update the device to the latest Firmware version as it could be resolved on the latest updates. Firmware: Firmware versions - Teltonika Telematics Wiki

On the other hand, if the same issue persists we would like to analyze your issue. Kindly create a Helpdesk Ticket or coordinate with your Sales Manager. If you don’t have any contacts with our Sale managers, please contact them on our official website https://teltonika-gps.com/ and click on the “Contact Us” button. When you will click, please fill the form and submit it.

Kind regards,
Patrick S.

In your link for firmware versions, FMC650 and FMB641 “newest recommended version” is the same as the factory version. I also checked the versions of my gps devices but still the problem persists.

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