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3 If RTC bit in CONTROL_IND is 1 then assert otherwise deassert
4 If RTR bit in CONTROL_IND is 1 then assert otherwise deassert
5 If DV bit in CONTROL_IND is 1 then assert otherwise deassert
6 If IC bit in CONTROL_IND is 1 then assert otherwise deassert
If this register is changed while in command and connected mode, then on
going back online using the ATO command, the modem output lines will
get refreshed.
S553 0x0201 0x0FFF This register specifies in each 4 bit nibble, how the DTR,DCD,RI output
pins are controlled when NOT in a Bluetooth connection
Nibble 0..3 specifies the source for DTR
4..7 specifies the source for DCD
8..11 specifies the source for RI
In addition it also refers to S Register 552 to see if the relevant pin is an
input or not to be touched. If the nibble in 552 is 0, then the relevant pin
is an input.
Each nibble can take the following value:-
0 Always deassert
1 Always assert
2 Assert if RING is being sent to the host
The default for the Universal RS-232 Adaptor is $0200.
S554 0 0..900 If S Register 512>=2 and <=7 then this register specifies a time in
seconds for which the device will stay in the S512 mode after power up or
reset. On timeout, it will abort the discoverable and/or connectable and fall
back into S512=1 mode, when it is deaf and dumb.
Note that if AT+BTR has been used to specify a peer device, then on
reverting to mode 1, it will attempt to make a connection to that peer
device.
A power cycle, reset via BREAK or ATZ is required to see the effects of
change.
S555 1 1..7 If S Register 554 is nonzero, then after the post reset window expires, the
mode will revert to the mode specified in this register. This allows, for
example, the device to be discoverable and connectable on power up
(mode 4 or 7) and on window timer expiry to revert to connectable only
(mode 3 or 6).
A power cycle, reset via BREAK or ATZ is required to see effects of a
change.
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 568 and if
deasserted then S Reg 569.
S556 0 0..3 Allows GPIO or ADC values to be read via the minor class field in an inquiry
response.
When this value is non-zero, bits2 to 7 contain information as follow:-
1 :- ADC1
2 :- ADC2
3 :- GPIO1 to GPIO6
Set to 0 to disable this feature.
This allows i/o information to be conveyed without a connection.
S557 32 4..900 Specified in seconds, the update interval for the feature enabled via S Reg
556
S558 0 0..1 When 1, the following responses; “RING”, “NO CARRIER” and “CONNECT”
are replaced by “BTIN”, “BTDOWN” and “BTUP” respectively. This will
eliminate ambiguity when the module has a Bluetooth connection to an AT
modem which also gives these responses.
S559 0 0..3 This specifies a mask.
When Bit 0 is 1, the response word “ERROR“ is replaced by “BTERR” and
“OK” is replaced by “ok”.
When Bit 1 is 1, then error responses do not include the error number and
instead the error number can be retrieved using ATI12.
S560 15 15..120 Disconnect timeout in seconds. This timer specifies how long to wait for
confirmation from the peer device and/or the underlying stack that the
DSH_50003_v1v3 AT Command Reference 14 of 33