将字符串发送到 serial.to_bytes 不起作用

问题描述

我正在尝试发送一个包含命令的字符串变量.

I am trying to send a string variable contains the command.

像这样:

value="[0x31, 0x0a, 0x32, 0x0a, 0x33, 0x0a]"
self.s.write(serial.to_bytes(value))

上面的失败了.不会出错.

The above one fails. Won't give any error.

但是当我发送这样的值时它正在工作:

But it's working when I send a value like this:

self.s.write(serial.to_bytes([0x31, 0x0a, 0x32, 0x0a, 0x33, 0x0a]))

我也尝试过发送这样的字符串:

I also tried sending string like this:

self.s.write(serial.to_bytes(str(value)))

还是不行.有人可以告诉我如何通过存储在字符串中来发送值吗?

Still not working. Can someone please let me know how to send the value by storing in string?

我想做这件事:

value="[0x"+anotherstring+",0x"+string2+"0x33, 0x0a]"

并发送值.

谢谢！

推荐答案

如果传递整数列表对您有用，那么只需将您的十六进制表示转换为整数并将它们放入列表中.

If passing a list of integers works for you then just convert your hexadecimal representations into integers and put them in a list.

详细步骤:

1. 打开一个python解释器

1. Open a python interpreter

导入serial并打开一个串口，命名为ser.

Import serialand open a serial port, call it ser.

复制下面的代码并粘贴到python解释器中:

Copy the code below and paste it in the python interpreter:

代码:

command = '310a320a330a'
hex_values = ['0x' + command[0:2],  '0x' + command[2:4],
              '0x' + command[4:6],  '0x' + command[6:8],
              '0x' + command[8:10], '0x' + command[10:12]]
int_values = [int(h, base=16) for h in hex_values]
ser.write(serial.to_bytes(int_values))

它会产生与仅此相同的效果:

It will have the same effect that just this:

ser.write(serial.to_bytes([0x31, 0x0a, 0x32, 0x0a, 0x33, 0x0a]))

实际上你可以测试 int_values == [0x31, 0x0a, 0x32, 0x0a, 0x33, 0x0a] 是 True 所以你写的完全一样.

actually you can test that int_values == [0x31, 0x0a, 0x32, 0x0a, 0x33, 0x0a] is True so you are writing exactly the same thing.

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