具有多个变量的arduino python接口 [英] arduino python interface with multiple variables

问题描述

我想将 3 个不断变化的传感器变量带到我的 Python 界面.

I want to bring 3 sensor variables that change all the time to my python interface.

我正在尝试使用此测试代码，它不起作用，我做错了什么?

I am trying with this test code, it does not work, what am I doing wrong?

阿杜诺:

void setup() {
  Serial.begin (9600);
}

void loop() {
  Serial.print(random(1,3)); 
  Serial.print(random(3,5));
  Serial.print(random(5,7)); 
}

蟒蛇:

canvas.create_text(190, 150, text=ser.readline(1), fill="gray", font="Helvetica 45 bold",tag="T1")

如何让多个变量一直更新?现在我只是得到第一个，它没有更新

How can I get multiple variables updating all the time? right now I am just getting the first one, and it is not updating

推荐答案

为什么使用 readline 函数只读取一个字节?由于您需要多个值，请用(例如)空格分隔变量，然后使用 readline 将它们全部存储并使用 split 将它们分开:

Why are you using the readline function to read just one byte? Since you want multiple values, separate the variables with (for instance) a space, then use readline to store them all and split to separate them:

PS:注意最后一个其实是一个println

PS: note that the last one is actually a println

阿杜诺:

void loop() {
  Serial.print(random(1,3));
  Serial.print(" "); 
  Serial.print(random(3,5));
  Serial.print(" ");
  Serial.println(random(5,7)); 
}

蟒蛇:

allitems=ser.readline()
separateditems=allitems.split();
canvas.create_text(190, 150, " - ".join(separateditems), fill="gray", font="Helvetica 45 bold",tag="T1")

在这个例子中，我把项目放在 separateditems 列表中(所以 separateditems[0] 等于 random(1,3), separateditems[1] 等于 random(3,5) 并且 separateditems[2] 等于 random(5,7)).然后我加入他们以显示随机(1,3)-随机(3,5)-随机(5,7)".无论如何，您可以对收集到的数据做任何想做的事情.

In this example I put the items in the separateditems list (so separateditems[0] is equal to random(1,3), separateditems[1] is equal to random(3,5) and separateditems[2] is equal to random(5,7)). Then I joined them to display "random(1,3) - random(3,5) - random(5,7)". Anyway you can do whatever you want with the collected data.

那么我强烈建议您在 loop 内设置延迟，以避免发送太多数据.我建议将 delay(100); 放在最后，或者，如果您在等待时需要做其他事情，请参阅无延迟弹跳"示例.

Then I HIGHLY suggest you to put a delay inside the loop, to avoid sending too many data. I suggest putting a delay(100); at the end or, if you need to do other things while waiting, see the "Bounce without delay" example.

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