Send data via UUI/UDI

Hello there,

I am using the TWR RTLS and data telemetry demo from leapslabs.
I can see the tag moving around on the grid on my phone. Awesome!

Now I want to send some data from/to the tag.
I have connected to the tag via UART and thought the udi/uui commands would achieve this.
However, this is all I get:

leaps> udi
dl: show on
leaps> uui 123490
ul: len=3 cnt=1 rv=3:  12 34 90

On my phone (android) I can send a message to the node

But I don’t seem to get anything back

Am I missunderstanding how these commands work? Is there a(nother) way of sending data from the tag to my phone?

Best regards,