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| 型号： | CB-OEMSPA311I-01 |
| 厂商： | ConnectBlue |
| 文件页数： | 16/60页 |
| 文件大小： | 0K |
| 描述： | KIT STARTER OEM SRL 311I RS232 |
| 标准包装： | 1 |
| 系列： | OEM Serial Port Adapter™ |
| 类型： | 蓝牙 |
| 频率： | 2.4GHz |
| 已供物品： | 模块，适配器，线缆，CD |
| 其它名称： | 809-1006 |
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This introduces a roaming issue. If the module that left the network returns (returns into range),
it will still believe it is the access point of the network. Suddenly we have two modules acting as
access point. These modules effectively operate on different networks and will not be able to
communicate.
To try to remedy this issue connectBlue has introduced a trigger setting into its OWSPA311g
module. This trigger will activate if one module has been alone in a network for too long. It will
then try to scan for present network and connect to it if possible. This timeout period is adjust-
able via an S register.
However, this only solves the most basic of roaming cases for ad-hoc. Imagine an ad-hoc net-
work with four modules. If two modules leave at the same time and leaves the two other mod-
ules behind. There is little chance of the four modules reconnecting again without interaction.
Therefore, if roaming if desired, please look into planning a proper network with access points
spread out over the desired area.
Improving Roaming in Infrastructure Networks
If you are using the module in an infrastructure network there is one way to improve roaming
times radically. By using the command AT*AGCL you can define the channel list the module
should use. By default, this channel list includes all legal channels but since it is unlikely that one
network is using all channels available you can narrow it down. This means that instead of
scanning 11 to 14 channels you can set it to scan only the ones in your network, which should
be very few.
So, for instance, if your network only uses 3 channels, say 1, 6 and 11. When a connection is to
be established the module will only scan the three channels instead of 11 or 14, which takes a
lot shorter time. When a module later moves out of the range of one AP, it will only have to
scan these three channels again to find an appropriate access point.
CPU Idle, Improving Response Times and Throughput
By default, the modules cpu is put into a mode where it will try to sleep as often as possible,
thus conserving power. Setting the Power Save mode to Online does not affect this specific set-
ting. To adjust this you need to use the S-register 4005.
At low speeds, the cpu idle setting will not make a difference in response times or throughput.
However, at higher uart speeds, from 230 Kbit/s and up throughput will be affected. If you de-
sire maximum throughput at these speeds, you should look into changing this setting.
5.5 Pin Diagrams
These diagrams show the pin behaviour for different configurations.
Figure 1 Default configuration, DTR mode = at startup
Version 1.6.6 - 2009-11
16
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| CB-OEMSPA311I-04 | 功能描述:SERIAL PORT ADAPTER OEM 311I RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:CB-OEM 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件 |
| CB-OEMSPA311X-04 | 功能描述:SERIAL PORT ADAPTER OEM 311X RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:CB-OEM 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件 |
| CB-OEMSPA312I-02 | 功能描述:SERIAL PORT ADAPTER OEM 312I RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:CB-OEM 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件 |
| CB-OEMSPA312I-04 | 功能描述:KIT DEV BLUETOOTH I/O 311I RoHS:是 类别:RF/IF 和 RFID >> RF 评估和开发套件，板 系列:- 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796 |
| CB-OEMSPA312X-02 | 功能描述:SERIAL PORT ADAPTER OEM 312X RoHS:是 类别:RF/IF 和 RFID >> RF 收发器 系列:CB-OEM 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件 |
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