LEON-G100 / LEON-G200 - System Integration Manual
GSM.G1-HW-09002-G3
Preliminary
Feature description
Page 106 of 125
3.10
Smart Temperature Management
Wireless modules – independent of the specific model –always have a well defined operating temperature range.
This range should be respected to guarantee full device functionality and long life span.
Nevertheless there are environmental conditions that can affect operating temperature, e.g. if the device is
located near a heating/cooling source, if there is/isn’t air circulating, etc.
The module itself can also influence the environmental conditions; such as when it is transmitting at full power.
In this case its temperature increases very quickly and can raise the temperature nearby.
The best solution is always to properly design the system where the module is integrated. Nevertheless an extra
check/security mechanism embedded into the module is a good solution to prevent operation of the device
outside of the specified range.
Smart Temperture Management feauture is not supported by LEON-Gx00-05S and previous versions.
3.10.1
Smart Temperature Supervisor (STS)
The Smart Temperature Supervisor is activated and configured by a dedicated AT+USTS command. For more
details refer to
u-blox AT Commands Manual
The wireless module measures the internal temperature (Ti) and its value is compared with predefined thresholds
to identify the actual working temperature range.
Temperature measurement is done inside the wireless module: the measured value could be different
from the environmental temperature (Ta).
Warning
area
t
-1
t
+1
t
+2
t
-2
Valid temperature range
Safe
area
Dangerous
area
Dangerous
area
Warning
area
Figure 58: Temperature range and limits
The entire temperature range is divided into sub-regions by limits (see Figure 58) named t
-2
, t
-1
, t
+1
and t
+2
.
Within the first limit, (t
-1
< Ti < t
+1
), the wireless module is in the normal working range, the Safe Area
In the Warning Area, (t
-2
< Ti < t
.1
) or (t
+1
< Ti < t
+2
), the wireless module is still inside the valid temperature
range, but the measured temperature approaches the limit (upper or lower). The module sends a warning to
the user (through the active AT communication interface), which can take, if possible, the necessary actions
to return to a safer temperature range or simply ignore the indication. The module is still in a valid and good
working condition
Outside the valid temperature range, (Ti < t
-2
) or (Ti > t
+2
), the device is working outside the specified range
represents a dangerous working condition. This condition is indicated and the device shuts down to avoid
damage
For security reasons the shutdown is suspended in case an emergency call in progress. In this case the
device will switch off at call termination.
The user can decide at anytime to enable/disable the Smart Temperature Supervisor feature. If the
feature is disabled there is no embedded protection against disallowed temperature conditions.
