INSTALLING AND USING THE DEVICE
16
MultiConnect
®
Cell MTC-LVW2 User Guide
Chapter 3 – Installing and Using the Device
Installing the Device
1.
Connect suitable antenna(s) to the antenna connector(s).
2.
If your device is the serial version:
Connect the DE9 male connector (9-pin) of the RS-232 cable to the RS-232 connector on the device, then
connect the other end to the serial port on the other desired device.
Screw-on the power lead from the power supply module into the power connection on the device.
Plug the power supply into your power source.
3.
The POWER LED lights after the device powers up.
Placing Serial Devices in Power Save Mode
The serial devices offer a low power mode (sleep or power save mode) using the power save switch (below the
SIM card slot) on the device to change from normal or low power mode. The low power mode is intended for
battery or solar-powered, IoT applications such as outdoor remote sensors.
There are other techniques to place the device into low power mode. This example uses data terminal ready (DTR)
and the AT cCFUN=5. For other techniques, review the AT command guide for your device, as described
in the Documentation section of this guide.
The device also wakes up from sleep mode by using the wake-on-ring feature. See the following example using the
ring indicator line to wake the host processor when the radio receives an incoming call or SMS message. Your
application then needs to act on the ring indication and wake up the device by asserting DTR.
Using Low Power Mode
Here are some different configuration options for low power mode:
To turn on low power mode, set the power-save switch to LOW.
On the RS-232 interface, ensure your application controls DTR and makes it active (on). To configure the
device for DTR control, issue either AT&D1 or AT&D2 for DTR control. The &D0 command does not allow
low power to operate.
To configure the device to enter low power (sleep) mode, issue AT+CFUN=5 to the radio.
To configure the device to wake from low power mode by using the wake-on-ring feature, issue
AT#E2SMSRI=1000. This configures the ring indicator to go active for 1000 ms when an SMS message is
received.
To have the device enter sleep mode, set DTR to inactive (off) on the RS-232 interface. The clear to send
(CTS) signal is off when the device is in sleep mode.
Powering Down Your Device
CAUTION:
Failing to properly power down the device before removing power may corrupt your device's file
system.
To properly power down your device, use the following sequence :
1.
Issue the AT#SHDN command.
2.
Wait 30 seconds.
