Question

Hi
I'm using Teltonika TFT100.
I need to switch on the scooter ignition by sending SMS "  setdigout 1 ?" and I got this in configurator I/O info:

But when I check the voltage on DOUT1 pin, the voltage is 0V.
Why?

Answer 1

Hello Faris,

Thank you for your question.

The Digital outputs on the TFT100 work as Open Collector, when the Dout is enabled (Dout = 1) it is connected to GND.

When the Dout is disabled (Dout = 0) it is an open circuit.

In the next link, you can get a scheme connection of a digital output to control a relay.

https://wiki.teltonika-mobility.com/wikibase/images/4/4b/Immobilizer-testing-scheme.png

For more information about Open Collector please check the next link.

https://en.wikipedia.org/wiki/Open_collector

Best regards.

Comments

Thank you for the answer Luis,

Do u have this explanation on the TFT100 site?