Yes if its a pdu mode phone, the you do have to convert, but if you can get the HW side of nokia working it uses text mode.

mind you with the lack of string commands in pbp working in pdu mode is just as easy lol.

the point i made (years ago!) is tha if the data is not changing, and the responses are set, say for like a garage door opener where the only responses could be door open or door closed, then you can pre-encode them and just use them as pdu strings.

Same with the incoming, if the commands coming in are pre-set , ie open door, close door, you can pre-compile the expected expected result and compare the received pdu string to the pre-compiled expected response.