Question

Hi,

I have a TRB140 and I need to measure the battery voltage. Is the ADC input on the board active? Can I connect a measurement module, e.g. INA219, using the I2c bus?

Best reg Qyik

Answer 1

Hello,

At the moment some external monitoring device would be a solution.

I will consult the RnD about the possibility to retrieve the voltage from the device. The modem module used within TRB140 does have two ADC channels, and internal schematics suggest that one of them is connected to a power voltage over a voltage divider.

It should be possible to retrieve the value measured by ADC with the following command:

• gsmctl -A 'AT+QADC=0'

However, it returns error messages, unlike on RUT2 or RUT9 devices, and this solution does not work.

Once there is an update, if it is possible to somehow measure input voltage, I will let you know.

Best regards,

Comments

Hi,

Thanks for the answer. TRB140 is a gate that consumes relatively little power and therefore is often used in battery-powered installations (at least in ours) adding functionality would help us a lot. Thanks again and waiting for the update.

BR Q

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Hi,

Did you manage to do something about this? Maybe you can give me a hint.

Best regards