User's Manual

Class 1 Bluetooth v2.0 Module
User’s Guide
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CONN-GUIDE-BT730_v0.9
 1 = Connection timeout
 2 = Connection attempt cancelled
 3 = Normal disconnection
 4 = Peer device has refused connection
 5 = Service profile <uuid> requested not available on remote device
 6 = Connection has failed
 32 = ATH was entered
 33 = Incoming connection aborted because too many rings
 34 = Unexpected incoming connection
 35 = Invalid address
 36 = DSR is not asserted
 37 = Call limit of 65531 connections has been reached
 38 = Pairing in progress
 39 = No link key
 40 = Invalid link key
 255 = Unknown reason
I12
The last ERROR response number.
I13
The Sniff status is returned as follows:
Response:<cr,lf>a:b,c,d,e<cr,lf>OK<cr,lf>
Where ‘a’ = 0 when not online and 1 when online and Sniff has been enabled, ‘b’ is the Sniff
Attempt parameter, ‘c’ is the Sniff timeout parameter, ‘d’ is the minimum sniff interval and ‘e’
is the maximum sniff interval. All parameters ‘b’, ’c’, ’d’ and ‘e’ are given as Bluetooth slots
which are 625 microseconds long converted from values of S Registers 561, 562, 563, and
564 respectively.
I14
The current boot mode (only for firmware 1.18.0 and newer)
I15
The maximum length of an AT command, including the terminating carriage return (only for
firmware 1.6.10 and newer).
I16
The size of AT command input buffer.
I20
Returns the number of bytes pending to be sent in the RF buffer when a connection is up.
I33
Version number of Multipoint application
Note: ATI is provided for compatibility in multipoint mode; other AT commands are not
available.
I42
State information. Where the response values are as follows:
13 = Not Open
14 = Open Idle
15 = Ringing
16 = Online Command
172 to 177 = waiting for connectable and/or discoverable where the lowest significant digit
equates to the value stored in S Register 512 or 555.
Note: When n=16, ATI9 returns 1.
I101
The RSSI value in dBm. If a connection does NOT exist then a value of -32786 is returned.
A value of 0 means the RSSI is within the golden range; because this is a very large band,
RSSI is not always a useful indicator. Use ATI111 instead which returns the bit error rate.
I111
Returns LinkQual which in the CSR chipset is defined as BER (bit error rate). This returns a
value which is the number of bits in error out of 1 million. Hence a value of 0 is best, and
larger values are worse. A value approaching 1000 (BER = 0.1%) is an indication that the