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AT+CMER?
+CMER: 00,02,00,00,00
4.11.2
Unsolicited UI Status Messages
Certain actions performed in the g20 UI by the user are transmitted to all attached accessories, primarily as a notification of a
change in state. For example, notification of a phone-book storage, recall operation or setting a call restriction level. These
messages are required by certain accessories to maintain local information, or to provide additional information on an auxiliary
display.
4.11.2.1
+CKEV, Key Press Echo Output
This unsolicited message is sent when local key press echo is enabled (as described in "+CMER, Set/Request Local Key Press
Echo Keypad Mode" on page 207) and a key is pressed on the g20 keypad. The identity of the key is broadcast to all the
accessories, as well as information about whether the key was pressed or released. This command can be configured to send key
presses from the g20 keypad only, or from other accessories as well.
When the phone is locked and a digit or a softkey is pressed, the "@" character is used in the message event instead of the actual
key being pressed. This prevents passwords or codes entered by the user being monitored or stolen by attached accessories (for
example, Bluetooth devices).
Unsolicited Report
Response/Action
+CKEV: <key>,<press>
The following table shows the +CKEV parameters.
<Parameter>
<key>
Key that changed state
<press>
0
1
Example
For g18 compatible
AT+CMER=?
+CMER: (00),(00,01,02),(00),(00),(00)
For g20
AT+CMER=?
+CMER: (0,1),(0,1,2),(0),(0),(0)
98-08901C68-O
Table 102. +CKEV Parameters
Description
Key released
Key pressed
AT Commands Reference
209
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