嗨,我想在我的 arduino 上控制 8 个带蓝牙的泵......我想将"ON"的数字"1"更改为"1on",将"OFF"的"2"更改为"1off",而不是"2开" , "2关" ,"3on","3off"等,但我不知道怎么做,因为我不是编码员......这是我的代码:
int PUMP1 = 2;
int PUMP2 = 3;
char value = 0;
void setup()
{
Serial.begin(9600);
pinMode(PUMP1, OUTPUT);
pinMode(PUMP2, OUTPUT);
}
void loop()
{
if (Serial.available())
{
value = Serial.read();
if (value == '1') digitalWrite(PUMP1, LOW); //relay1 on
else if (value == '0') digitalWrite(PUMP1, HIGH); //relay1 off
if (value == '3') digitalWrite(PUMP2, LOW); //relay2 on
else if (value == '2') digitalWrite(PUMP2, HIGH); //relay2 off
}
}
您需要将Serial.read()
替换为Serial.readStringUntil('n')
。字符串需要使用尾随换行符发送。
void loop()
{
if (Serial.available())
{
String value = Serial.readStringUntil('n');
if (value == "1on") digitalWrite(PUMP1, LOW); //relay1 on
else if (value == "1off") digitalWrite(PUMP1, HIGH); //relay1 off
else if (value == "2on") digitalWrite(PUMP2, LOW); //relay2 on
else if (value == "2off") digitalWrite(PUMP2, HIGH); //relay2 off
// and so on
}
}
评论中提出了Serial.readString()
,但这会导致 1 秒的延迟(默认情况下(。在这种情况下,当在一定时间内没有数据时,字符串被视为完整。并且不可能同时控制多个继电器。