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UBX-18013618 - R11
OBS421 Dual Mode
FirmwareStand-alone dual-mode
Bluetooth modulesRelease notes
Abstract
This document describes the software releases of the OBS421 stand-alone
dual-mode Bluetooth modules
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Document InformationTitle OBS421 Dual Mode FirmwareSubtitle Stand-alone dual-mode Bluetooth modulesDocument type Release notesDocument number UBX-18013618Revision and date R11Document status Production InformationDisclosure restriction
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Contents
1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Version 5.3.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.1 Known Limitations and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.1 Remote name does not work for peripherals with random address . . . . . . . . . . . . . . . . . . 5
2.1.2 Re-bond with resolvable address does not work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.3 Windows 7 Authentication Work-Around . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.4 Automatic Packet Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.5 Exit Sniff on Data Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.6 Removing of stored link keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.7 Advertising and scan response data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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1 GeneralBluetooth ™ firmware, cB-2254, with and Serial Port Adapter Wireless Multidrop™ Extended Data
support (up to 7 simultaneous Bluetooth connections).Mode
The firmware is valid for the following ™ models:Serial Port Adapter
Products with Bluetooth low energy support
RBS421
OBS421 dual mode (Rev B):
OBS421i-24
OBS421x-24
OBS421i-26
OBS421x-26
OBS421i-C? (where ? is any digit)
OBS421x-C? (where ? is any digit)
OBS421 dual mode (Rev A):
OBS421i-14
OBS421j-14
OBS421x-14
OBS421i-16
OBS421j-16
OBS421x-16
OBS421i-B? (where ? is any digit)
OBS421j-B? (where ? is any digit)
OBS421x-B? (where ? is any digit)
This firmware is valid for the module versions listed above . For firmware for other onlyOBS421 module versions (modules without Bluetooth low energy support) contact [email protected]
If you experience problems with your product please fill out an anomaly report and email it to [email protected]
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2 Version 5.3.2
Firmware Binary Version Comment
cB-2254-12(fw_obs421_rd_v5.3.2).bin 5.3.2 [00:28:06,Apr 29 2015] Fixed test command for production
Remember to also update to the latest version of the Bluetooth Serial Port Adapter AT and when Commands for OBS421, OBS418, OBS419 and OLS425 Serial Port Adapter Toolbox
updating the firmware.
2.1 Known Limitations and Notes
2.1.1 Remote name does not work for peripherals with random address
The work-around is to use GATT AT-commands for this instead, see example below.
Connect:AT*ADCP=62b8a1beed07r,17,0,0,0,5000*ADCP:0OK
Read remote device name:AT*GATTRU=0,1,65535,2A00*GATTRU:0,3,426C7565746F6F746820446576696365OK
DisconnectAT*ADCC=0,1OK
2.1.2 Re-bond with resolvable address does not work
A work-around is to first delete the bonded device and then do an inquiry to get the current address
2.1.3 Windows 7 Authentication Work-Around
The way that Microsoft Windows 7 handles Bluetooth connections, may in some use-cases, cause issues during the authentication phase between the device and the Bluetooth module. To solve these potential issues, connectBlue has implemented a Windows 7 authentication work-around in the Bluetooth module.
To enable the work-around, set the Windows 7 Work-Around feature bit using the feature bit mask register command.
AT*AMWFM=1,0x20,1
The command needs to be called only once and the module must be restarted for the command to take affect.
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2.1.4 Automatic Packet Control
An automatic packet control algorithm was implemented to improve link robustness for long range or if there are obstacles. It is enabled only for link policy 0 (see AT*AMLP). The algorithm decreases the packet size if the link is poor, to improve robustness. It prioritizes link robustness at the cost of keeping the best performance for as long as possible. If you find it too defensive and prefer to keep the bigger size packets for better throughput the automatic packet control algorithm can be disabled by setting link policy (0,1) or any other link policy than the default one (0).
Use link policy 0,0 for BR packets with the connectBlue packet control algorithm.
Use link policy 0,3 for EDR packets with the connectBlue packet control algorithm (faster for short range).
Use link policy 13,0 (or 0,1) for BR packets only without the connectBlue packet control algorithm.
Use link policy 2,0 for EDR packets without the connectBlue packet control algorithm.
2.1.5 Exit Sniff on Data Activity
When the module is configured with a link policy for sniff mode with exit sniff mode on data activity (Link policy (4,1), (5,1), (6,1), (7,1), (8,1)), there is a risk of data loss.
2.1.6 Removing of stored link keys
When upgrading from previous versions the stored link keys will be removed because of a new link key format.
2.1.7 Advertising and scan response data
For the v5.1.3 release the connectBlue Serial Service service UUID was added to the scan response data. It was added to the scan response data instead of the advertising data for backwards compatibility with earlier firmware versions. However, when a central device is using passive scan instead of active scan the central device will only see the advertising data and not the scan response data.
For example Apple recommends filtering on UUIDs when doing a scan in iOS apps and may use passive scan when the app is not active. This may require that the UUID is part of the advertising data instead of the scan response data.
Use the commands below to set the connectBlue Serial Service service UUID in the advertising data and set the device name in the scan response data:
AT command Description
AT*AGAD=020a04110701d7e9014ff344e7838fe226b9e15624,1
Set advertising data to:Tx power: 4dBm [020a04]128-bit Service UUIDs, complete list: connectBlue Serial Service UUID[110701d7e9014ff344e7838fe226b9e15624]
AT*AGSD=07094f4253343231,1 Set scan response data to:Complete Local Name: OBS421 [07094f4253343231] where07 is the length of the data
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AT command Description
09 is the AD type complete local name4f4253343231 is the name datato set a different name change the length and name data fields
3 History
Firmware Binary Version Comment
cB-2254-11(fw_obs421_rd_v5.3.1).bin
5.3.1 [23:47:57,Mar 31 2015]
Fixed problem when connecting to a shut-down previously bonded resolvable peripheral
Connection problem to privacy enabled low energy peripherals fixed.Read the chapter in the Privacy Bluetooth Serial Port Adapter AT
thoroughly if low energy should be used.Commands
iOS 8.2 connection problem on Bluetooth low energy fixed
Maximum number of links is increased to 7 for rev B and 6 for rev A.In order to connect more than 3 links the connection interval might be necessary to increase. Note that the rev A might need a higher connection interval for a specific number of links compared to rev B. See in the WirelessMultidropConfiguration(AT*ADWM) Bluetooth
.Serial Port Adapter AT Commands
Serial port service for low energy connections without credit based flow control is now supported
Updated radio patch
Minor bug fixes
cB-2254-09(fw_obs421_rd_v5.2.1).bin
5.2.1 [11:50:43,Jun 12 2014]
Bug fix for stability problems
Updated radio patch
cB-2254-08(fw_obs421_rd_v5.2.0).bin
5.2.0 [00:55:10,Feb 27 2014]
Support for Rev B
Support for EN 300 328 v1.8.1 for Rev B products (product name ends with "-24", "-26", or "-C?" where ? is any digit)
cB-2254-07(fw_obs421_rd_v5.1.4).bin
5.1.4 [20:18:39,Dec 12 2013]
Production related updates
Bug fixes for advertisements
cB-2254-06(fw_obs421_rd_v5.1.3).bin
Read bonded device reported wrong device when using mixed Classic and Low Energy bonds. This has been fixed now.
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Firmware Binary Version Comment
5.1.3 [16:31:02,Oct 24 2013]
Firmware for the radio has been updated to the latest version which fixes some connect/disconnect issues.
connectBlue Serial Port service UUID added to scan response data. This makes it possible to filter on the Serial Port Service UUID when doing a scan in for example iOS or Android apps. Please see the notes section below for further information.
cB-2254-04(fw_obs421_rd_v5.1.1).bin
5.1.1 [20:00:29,Jun 19 2013]
Bug fix for credit based flow control for connectBlue Low Energy Serial Port Service when operating in central mode with multiple connections.
cB-2254-03(fw_obs421_rd_v5.1.0).bin
5.1.0 [17:01:45,Jun 11 2013]
Modified Serial Port Service protocol. This version of cB-OBS421 includes changes in the Serial Port Service protocol and is NOT backwards compatible. For communication with cB-OLS425/426, version 1.1.0 or later is required.
Faster connections.
Added new feature mask bits, including Power Reduction feature, see AT*AMWFM bit 14 in the Bluetooth Serial Port Adapter AT Commands.
Added GATT commands for the low energy central role to be able to discover, read and write to remote characteristics, see Bluetooth Serial
.Port Adapter AT Commands GATT
Support for custom advertise data, see AT*AGAD and AT*AGSD in the .Bluetooth Serial Port Adapter AT Commands
Two new modes for Low Energy inquiry which shows all advertising data.
Changed default link loss timeout for Low Energy from 5 sec to 2 sec.
Changed default max connection interval from 6 to 8 for Low Energy.
cB-2254-02(fw_obs421_rd_v5.0.2).bin
5.0.2 [15:49:16,Feb 1 2013]
The meaning of AT*ALE is slightly modified and is replaced by AT*AGLE.role_and_profile value 14 has been slightly modified and value 15 has been removed from AT*ADCP, AT*ADDCP and AT*ADDSP.
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