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Hey there,

I want to connect one-wire temperature sensor to the FMB920 device but there is no data is coming into the analog input 1

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Thank you for your question.

AIN1 input is analog input. Input range: 0-30 V DC.

There you can supply voltage in the range of 0-30 V DC it does not support 1-Wire sensors.

FMB920 has no 1- Wire inputs.

You can measure the temperature using a wireless sensor, e.g. BLUE COIN T-

Here you can find additional informations

You can using other devices also which support 1- Wire - 

For example FMB120 or FMB202,fmb120,fmb920

Best regards,

Teltonika Support