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SIM900_AT Commands Manual_V1.07 142 2012.12.10

Response

+CHFA: <n>

Read Command

AT+CHFA?

Parameter

See Write Command

Response

If error is related to ME functionality:

+CME ERROR: <err>

Write Command

AT+CHFA=<n>

Parameter

<n> 0 Main audio handset channel

1 Aux audio headset channel

2 Main audio handfree channel

3 Aux audio handfree channel

Reference Note

z This Command swaps the audio channels among different channels.

z This command is related to the actual module.

6.2.23 AT+CSCLK Configure Slow Clock

AT+CSCLK Configure Slow Clock

Response

+CSCLK: (list of supported <n>s)

Test Command

AT+CSCLK=?

Parameter

See Write Command

Response

+CSCLK: <n>

Read Command

AT+CSCLK?

Parameter

See Write Command

Response

ERROR

Write Command

AT+CSCLK=<n

Parameter

<n> 0 Disable slow clock, module will not enter sleep mode.

1 Enable slow clock, it is controlled by DTR. When DTR is

high, module can enter sleep mode. When DTR changes to

low level, module can quit sleep mode.

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