Hye there,
how can i get my Realdash to read the Can Lambda datastream?
i bought the app but dissapointed that it cant display my can lambda 
I think your best bet is to query from manufacturer on how can you configure the external CAN values to be part of their serial stream. The Link serial stream is configured by them, and there is nothing much we can do about it. All the data Link ECU sends in serial stream is available for RealDash.
Is it possible to create a custom Data Source? Thank you
We are not able to control what Link ECU sends over the serial, sorry 