格式转换:下位机发送的是32位无符号数据，上位机接收后都转换为字符串，并且高低位交换。辨识数据：转换后需要对数据进行辨识处理，下位机发送数据时加标签位（32位），构成标签+数值+标签+数值这样的格式。标签是1到56，标识56变量。也就是说如果下位机给每个变量赋值1，那么经过数据转换后的交换字112131415161718191101111121131141……，当然1到56不会安顺序发送-Format Conversion: lower machine to send a 32-bit unsigned data, after the host receives are converted to a string, and low bit exchange. Identification data: The need for data conversion process identification, tagging bit (32) when sending data the next crew, constitute such a format tag label+++ numerical value. Tag is　1 to 56, 56 identified variables. This means that if the next crew to each variable assignment 1, then after the data conversion exchange words 112131415161718191101111121131141 ......, of course, is not safe to send 1-56 sequence