Swarm M138 - $PO - Power Off

$PO - Power Off
Power off the device. If fully supported, after issuing $PO*1f the customer should command any
Modem power supplies to disconnect. If power is not disconnected, the Modem enters a low
power mode until power is completely removed and restored. Since there are no variable
parameters, the correct checksum has been added.
$PO*1f
Returns one of:
Value
Description
$PO OK*xx
Command has been accepted and the Modem will immediately attempt to
power off
$PO ERR*xx
Command input error
Notes:
An OK response confirms that the Modem will shut down. The user should disconnect power
from the Modem at this point. If left connected, the Modem will draw approximately 6mA on its
3.3V input. The Modem will not boot again until power has been completely removed and then
restored.
Example:
$PO*1f
$PO OK*3b
$M138 BOOT,SHUTDOWN*06
November 2021 Swarm M138 Modem Manual - Rev 1.00 59/77