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Power Consumption
The power consumption levels of the WISMO228 vary depending on the operating mode used and
the following sub‐sections describe the power consumption values of the WISMO228 when running
in various operating modes and RF bands.
Various Operating Modes
Refer to the following table for the list of available operating modes on the WISMO228.
Mode
When VBATT power is supplied to the WISMO228 but it has not yet been powered
OFF Mode
ON.
When alarm clock is set for the WISMO228 with ALL of the following conditions:
•
Alarm Mode
•
•
When the WISMO228 has a location update with a live network but with no
Idle Mode
GSM/GPRS connection, while the UART interface is in sleep mode.
Connected Mode
The WISMO228 has GSM voice codec connection with a live network.
Transfer Mode
The WISMO228 has GPRS data transfer connection with a live network.
Note that there are two different methods of entering sleep mode through the AT command,
AT+PSSLEEP.
•
AT + PSSLEEP = 0
The entry of sleep mode is controlled by the level of the DTR signal and the
firmware.
The WISMO228 will never enter sleep mode when the DTR (viewed from the
module side) is of LOW voltage level. On the other hand, the WISMO228 will enter
sleep mode when the DTR (viewed from the module side) is of HIGH voltage level.
To wake the WISMO228 up, it is necessary to toggle the DTR (viewed from module
side) from HIGH to LOW voltage level.
This method should be used if the application needs to forbid the entry of sleep
mode.
•
AT + PSSLEEP = 1
The entry of sleep mode is controlled just by the firmware.
WA_DEV_W228_PTS_002
Table 6.
WISMO228 Operating Modes
before time is up
with AT + CPOF having been entered from a computer that is connected to the
WISMO228
with the ON/~OFF signal being left open (remains at HIGH level)
Rev 001
Product Technical Specification &
Customer Design Guidelines
Description
Page 30 of 108
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