Ezurio BISM2 Guide de l'utilisateur télécharger pdf (Page 11)

Note that by implication, a change to this can only be seen after a power

cycle AND if AT&W is actioned prior to the power cycle.

If S Reg 554 is non-zero and this register is between 2 and 7 inclusive,

then the value of S554 specifies the time in seconds that the device will

remain in the specified mode after power up. On timeout, the device will

fall back to the mode specified in S Register 555.

S512 continued….

In some firmware builds, S Registers 565 to 569 inclusive are visible,

which allows the start-up mode to depend on the state of RI line (Setting S

Reg 565 forces the RI pin to be configured as an input). For this feature to

be active, SReg 565 should be set to 1. In that case, on start-up, if RI is

asserted, then the start-up mode is defined by S Reg 566 and if

deasserted then S Reg 567.

S513 1 0..1 Pairing Authentication, 1 = Enable

S514 10 1..60 Pairing Timeout in seconds. This includes the time a host takes to supply

the PIN number when PIN? messages are indicated.

S515 0x001F00 0.. 0xFFFFFF Default Device Class Code to be used with AT+BTO when it is not explicitly

specified. When queried, the value is always printed as a hexadecimal

number.

To change the device class of the module, after AT+BTO, use the

command AT+BTC.

S516 0x000000 0..0x2FFFFFF Default Device Class filter to be used with AT+BTI when it is not explicitly

specified. When queried the value is always printed as a hex number.

The seventh most significant digit, can be 0,1 or 2, and is used to specify

the type of device class filter.

When 0, it specifies no filtering.

When 1, it specifies an AND mask and all 24 bits are relevant

When 2, it specifies a filter to look for devices with matching major device

class which occupies a 5 bit field from bits 8 to 12 inclusive (assuming

numbering starts at bit 0). All other 19 bits MUST be set to 0.

S517 20 2..61 Inquiry Length in units of seconds. This parameter is referenced by the

AT+BTI command

S518 8 0..255 Maximum number of responses from an inquiry request. This parameter is

reference by the AT+BTI command. If this number is set too high, then

AT+BTI will return ERROR 27. For a particular firmware revision,

determine the effective maximum value by trial and error. That is, set to a

high value, send AT+BTI and if ERROR 27 is returned, then retry with a

smaller value. This effective max value will remain unchanged for that

particular firmware build.

S519 500 100..6000 When S507>0, and in a connection, DSR can be used to change from data

to command state by deasserting the DSR line for less than the time

specified in this register. This value is rounded down to the nearest 100ms

S520 Depends

on device

– see

comments

1200..115200 Change to a standard baud rate. The effect is immediate and in fact the OK

will be sent at the new baud rate. Only one of the following baud rates are

accepted: 1200,2400,4800,9600,19200,28800,38400,57600,115200.

If S register 525=1, then the maximum baud rate is limited to 115200

The default is 9600 for EZURiO’s BISM and Embedded Modules and 115200

for other EZURiO Bluetooth devices.

For the Go blue Activator variant of the module this register is read only

See S Register 526 for further information.

S521 See

Comment

1200..921600 Change baud rate to non-standard value. EZURiO’s modules support any

baud rate. The only limitation is the integer arithmetic involved, which

may adjust the applied rate slightly. If the internally computed baud rate

is more than 2% offset from the desired input value, then an ERROR will

be returned and the old baud rate will prevail. To inspect the actual baud

rate, do ATS521? See also section 8 of this manual.

S521 should only be sued for non-standard baud rates. For standard baud

rates use S520.

The effect is immediate and in fact the OK will be sent at the new baud

rate.

If S Register 525=1, then the max baud rate is limited to 115200

DSH_50003_v1v3 AT Command Reference 11 of 33

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 32 33

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Ezurio BISM2 Guide de l'utilisateur Page 11

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