NodeMCU mqtt led亮度控制

Question

您好，我想通过 mqtt 控制 LED，但我找不到将 LED 设置为我发送到 nodemcu 的值的方法。这就是我现在尝试做的方式，但它只能做值 0（然后它关闭）或更高（然后它打开）并且不会变暗。

if(topic=="ledstrip/red") {
  Serial.print("Changing RED Lights to ");
  if(messageTemp == "on"){
    for (int r = 0; r < 1023; r++) { 
      analogWrite(ledstrip_red, r);
      delay(1);
    }
    digitalWrite(ledstrip_red, HIGH);
    Serial.print("On");
  } else if(messageTemp == "off"){
    digitalWrite(ledstrip_red, HIGH);
    for (int r = 1023; r > 0; r--) { 
      analogWrite(ledstrip_red, r);
      delay(1);
    } 
    digitalWrite(ledstrip_red, LOW);
    Serial.print("Off");
  } else {
    Serial.print("Changing RED Brightness to ");
    digitalWrite(ledstrip_red, messageTemp.toInt());
    Serial.print(messageTemp);       
}

Answer 1

digitalWrite()只能设置值为0或1

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