关于波特率? gsm调制解调器发送消息的最佳波特率值是多少? [英] about baudrate ? what is the best baudrate value for gsm modem to send message ?

问题描述

大家好，

即时通讯使用gsmcomm.dll发送多条消息

有一个适用的波特率值.

最好是什么?

例如:GSM MODEM的波特率为9800?

而对于哪个应用程序最适合发送消息? 9800以下，9800以上或等于9800吗?


如果我从设备管理->>中更改Gsm调制解调器的波特率值，会发生什么情况?调制解调器选项卡?

请通知我

预先感谢您的帮助.

Hi guys,

im using gsmcomm.dll for sending multi message

There is a baudrate value for application.

What should be for the best ?

For example : The baudrate value of GSM MODEM is 9800 ?

And for application which is the best for sending message ? under 9800 , above 9800 or equals to 9800 ?


And what happens if i change the baudrate value of Gsm modem from Device Management ->> Modems tab ?

please inform me

thanks in advance for helping with me.

推荐答案

波特率通常不是您要玩的东西:(而且我怀疑您的意思是9600，而不是9800."一个标准数字)是指在不使用任何形式的时钟的情况下传输信息的串行位的速率.如果设备期望以特定的波特率接收数据，则它会等待一个开始位"，然后以固定的时间间隔开始抓取"位.如果您以不同的速率进行传输，则数据(在大多数情况下)将作为垃圾接收.

如果调制解调器显示"9600，8，1，none"，则它希望每秒9600位，每个字符8位，1个停止位，无奇偶校验.而且，如果您提供其他任何内容，您将得到乱码的数据.

Baud rate is not something that you normally play about with: (and I suspect you mean 9600, not 9800 it''s a standard number) it is the rate at which serial bits of information are transmitted without any form of clocking. If a device is expecting to receive data at a specific baud rate, then it waits for a "start bit" and begins "grabbing" bits at regular intervals after that. If you are transmitting at a different rate, then the data will (in most cases) be received as garbage.

If a modem says "9600, 8, 1, none", then it wants 9600 bits per second, 8 bits per characters, 1 stop bit, no parity. And it you give it anything else, you will get garbled data.

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