Maxon Telecom MM-6280IND 用户手册

Extended AT Commands Manual

Page 23 of 70

2009-06-25

5.3.1.1.

SMS low battery voltage set point (AT$$LOWBATT_VTG)

This command also sets the SMS Auto Voltage Alert value. (For remote user SMS notification
activation please see

SMS Auto Voltage Alert

Table 5-28 Read command

Command TE2

MT2

$$LOWBATT_VTG?

Response

TE2

MT2 $$LOWBATT_VTG:

Value1

610: Default – voltage point set for $$LOWBATT 1 notification
xxxx: 4 digit number representing voltage to 2 decimal points x100 (i.e. 12.8
volts would be represented as 1280, 9VDC would be 0900)
Value range is from 0910 to 3600.

E: If the first digit entered is a zero it is ignored in the response.

Table 5-29 Set command

Command TE2

MT2

$$LOWBATT_VTG=<value>

Response

TE2

MT2

$$LOWBATT_VTG: <value>
<result_code> (OK | ERROR)

5.3.1.2.

Low battery notification (AT$$LOWBATT)

Table 5-30 Notification command

Notify

TE2

MT2

$$LOWBATT: <value>

Value

0: normal state (voltage above 9.1VDC or that set by $$LOWBATT_VTG)
1: Low Battery (voltage has dropped to the point set at $$LOWBATT_VTG)
2: Power-off sequence initiated - battery voltage has reached 5.8VDC

NOTE: When the power supply to MT2 reaches 9.1 volts the modem will power up and send a $$LOWBATT 1 notification to TE2. It

does not send SMS alert at this time. SMS alert is automatically reinstated once the voltage exceeds the $$LOWBATT 1 set
point PLUS 10% as seen by the modem.

The following shows MT2’s responses against the battery level.
Table 5-31 Responses

Battery Level MT2

Batt level=1

a) Notifies TE2 with AT:

$$LOWBATT:1

b) Notifies local user:

buzzer

(repetition approx every 2 minutes)
c) Notifies with MO SMS if enabled

Batt level=2

Transmits $$LOWBATT:2 to TE2
Executes MT2 power-down sequence

NOTE: Tolerance of voltage readings is +/-0.4V on average.

NOTE: Modem will auto power up once supply voltage reaches 6.5VDC.