ES450 sending simple SMS message to serial port

Trying to send an SMS message using the 9-pin serial port. Here is the example given <<<15105554200,ASCII,12,54657374206d657373616765>>> (I change the cell# to mine).
and no message is sent or error on from the serial software (I’m using RealTerm), and it seems to be connecting correctly with 115200,8,1,N settings.

Is there a step by step example for this?


Have you tried the at*smsm2m command?

ATsmsm2m=”[phone][ascii message]”
smsm2m=”18005551212 THIS IS A TEST”

There’s additional commands in the userguide for the ES modem on page 186