Examples:
Calling the most recent date/time message:
$DT @*70
$DT 20190408195123,V*41
Returns a date/time of April 8th, 2019 7:51:23 PM GMT. The date/time is valid.
<rate> does not have to be valid to call the most recent date/time message.
Setting the rate of date/time messages:
$DT 300*03
$DT OK*34
Sets the rate of date/time messages to one message every 300 seconds.
Querying the rate of date/time messages:
$DT ?*0f
$DT 60*36
Returns a rate of one message every 60 seconds.
November 2021 Swarm M138 Modem Manual - Rev 1.00 39/77