我正在尝试用python中的串行通信与Arduino通信。有一个来自arduino https://www.arduino.cc/en/Tutorial/ReadASCIIString的程序。只需发送一个“120200100”来控制3个LED。当我用python编写数据到arduino时
你知道吗arduino.write公司(b'120,10244\n')
而且很有效。但我的主要问题是,如果我把这些值赋给一个变量,这个变量通过GUI得到更改,例如我计划在其上实现的PyQT滑块,我应该怎么做呢?你知道吗
如何输出分配给变量的3个整数->;到csv->;字节+\n
例如
P1=self.pwm1水平滑块.value()#假设值为120
P2=self.pwm2水平滑块.value()#假设值为200
P3=self.pwm3水平滑块.value()#假设值为100
进入b'120200100\n'
读取ASCII字符串代码
// pins for the LEDs:
const int redPin = 3;
const int greenPin = 5;
const int bluePin = 6;
void setup() {
// initialize serial:
Serial.begin(9600);
// make the pins outputs:
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
}
void loop() {
// if there's any serial available, read it:
while (Serial.available() > 0) {
// look for the next valid integer in the incoming serial stream:
int red = Serial.parseInt();
// do it again:
int green = Serial.parseInt();
// do it again:
int blue = Serial.parseInt();
// look for the newline. That's the end of your sentence:
if (Serial.read() == '\n') {
// constrain the values to 0 - 255 and invert
// if you're using a common-cathode LED, just use "constrain(color, 0, 255);"
red = 255 - constrain(red, 0, 255);
green = 255 - constrain(green, 0, 255);
blue = 255 - constrain(blue, 0, 255);
// fade the red, green, and blue legs of the LED:
analogWrite(redPin, red);
analogWrite(greenPin, green);
analogWrite(bluePin, blue);
// print the three numbers in one string as hexadecimal:
Serial.print(red, HEX);
Serial.print(green, HEX);
Serial.println(blue, HEX);
}
}
}
为了回答您的问题,在示例之外:
这是假设您希望字节使用UTF-8作为编码,这是常见的,但是您需要检查一些内容。它也可以是
cp1252
——这里更多https://docs.python.org/3/library/codecs.html#standard-encodings然后您可以将
the_bytes
发送到需要它们的任何地方。你知道吗相关问题 更多 >
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