利用串口读取电子称数据时,电子称不断传送数据,如何才能获取需要的重量值?

[AIRFLYNET]

利用串口读取电子称数据时,电子称不断传送数据,如何才能获取需要的重量值?

[zaodt]

电子称的说明书中有详细的通讯协议说明，如果没有找厂家要。

本来就是这样设计的，如果没有东西放在上边，重量为零。

[_石头_]

楼主的问题能说明白一点吗？譬如：是只有沉重两的时候始终发数据还是上电就不停的发？

[cpio]

其实就跟你自己看秤一样的，你看的时候不也相当于一直有数据进入你的大脑吗

关键是看它稳当在哪个范围之内

[jiaozhentang]

让做称的厂家在串口命令上加上一个稳定标志，^_^

[zaodt]

根据电子秤的通讯协议，一次读取一个有效数据包，然后分析出有效称重数据。

这个程序，我前段日子做过。

刚开始，数据是在变化的，不过过一会数据基本就稳定了。

读的时候，要注意，一个字节一个字节的读，当遇到 Header 字节时，开始缓存数据包，一直读到结束字节；在读的时候，如果又遇到 Header 字节时，重新开始缓存数据包。

这样做，数据不会错位。

[AIRFLYNET]

=00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =51.0 =03.7 =52.41 =55.12 =08.82 =01.63 =53.34 =07.75 =07.75 =59.75 =09.75 =09.75 =09.75 =58.75 =58.75 =02.85 =59.75 =50.85 =58.75 =04.75 =03.35 =57.0 =55.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =54.9 =58.61 =54.42 =04.13 =07.83 =09.54 =51.35 =08.75 =58.75 =58.75 =58.75 =09.75 =59.75 =59.75 =09.75 =58.75 =58.75 =58.75 =09.75 =09.75 =09.75 =09.75 =09.75 =09.75 =09.75 =08.75 =06.25 =58.0 =55.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0 =00.0

[AIRFLYNET]

读出的数据如上，无仑有无实物放于电子称上，它都不断地发送数据，其中非=00.0的部分即为重量

[alan001]

命令引导头

[meiZiNick]

以后需再关注，现在先帮你顶一下

[UltraBejing]

关注 接分

[一条晚起的虫]

看lz的数据，通讯协议中应该没有对称重稳定状态的标志。
那就在程序中定义连续N个重量相同（或者差值小于某个数值），电子秤处于稳定状态。非稳的数据是没有用的。

[huang71216]

分析数据帧的头和尾，根据协议分析判断。