UM1547 datasheet(14/51 Pages) STMICROELECTRONICS

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AT command list

UM1547

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DocID023232 Rev 5

If there is currently no connection, the response is:

AT-AB ConnectionDown

3.7

ChangeBaud

The host sends the ChangeBaud command in order to change the local UART speed to a

new speed identified by the host. This setting will only remain in effect during the current

session - until reset (as general rule, the UART baud rate must be lower than the HCI baud

rate set in the variable 26).

3.7.1

Syntax

AT+AB ChangeBaud [rate]

where [rate] is the new baud rate:

•

1200

•

2400

•

4800

•

9600

•

19,200

•

38,400

•

57,600

•

115,200

•

230,400

•

460,800

•

921,600

•

2,000,000

3.7.2

Responses

If the change is accepted, the response is:

AT-AB Baudrate Changed

The actual change will not occur until the response has been completely transmitted.

3.8

ChangeDefaultBaud

The host sends the ChangeDefaultBaud command in order to change the default UART

speed to a new speed identified by the host. This command is used to override the default

baud rate from the dynamic configuration script so that the device does not require

reprogramming to update this setting. The new baud rate is updated permanently until the

device is either re-programmed or another ChangeDefaultBaud command is issued. The

baud rate specified in the command will not take effect until the device is reset. To change

the baud rate of the current session, use the ChangeBaud command (as general rule, the

UART baud rate must be lower than the HCI baud rate set in the variable 26).

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