Arduino microphone/AMB decoder combination gets interrupted - c

Question

Microphone readout gets randomly interrupted
I have a microphone hooked up to my Arduino on a Serial hardware port 2.
https://sigrok.org/wiki/Colead_SL-5868P
I receive data from the microphone by sending 0x20 to it. The following functions read out it's data.
FlushMic1 is a function to flush out the Serial2 buffer, so we can read out the correct data from the buffer.
String getMic1()
{
String valueMic;
if(flushedMic1())
{
Serial2.write(0x20);
while (Serial2.available() <= 10){;}
valueMic = "";
for (int i = 0; i < 10; i++)
{
int data = Serial2.read();
valueMic += String(data);
}
}
return valueMic;
}
bool flushedMic1()
{
bool returnBool = false;
while(Serial2.available())
{
Serial2.read();
returnBool = true;
}
return returnBool;
}
On another port I have a transponder loop connected, to measure passing transponders.
If a transponder passes it sends char to the Serial Hardware port 1. It can be detected if it includes a '#'.
bool isTransponderPassing()
{
char data = Serial1.read();
if (data == '#')
{
return true;
}
return false;
}
Running the getMic1() function in a loop works perfectly fine. If the : if(isTransponderPassing()) is used in the in main loop I sometimes get the correct data, sometimes false data, when I receive false data, the entire program gets interrupted, which propably fills the buffer with 16's and that's why we receive 16's.
Who knows where my program can get stuck?
void setup()
{
// Starts the serial monitor
Serial.begin(2400);
// Starts Serial monitor of AMB decoder
Serial1.begin(9600);
// Starts Serial monitor of microphone 1
Serial2.begin(2400);
}
void loop()
{
Serial.println(Serial2.available());
Serial.println(Serial1.available());
if(isTransponderPassing())
{
Serial.println(getMic1());
}
}

Answer 1

I fixed the issue, because I wasn't aware Serial.readString() in getMic1() has a delay of 1 second. So I should just read the documentation better next time.
So everyone, Serial.readString() has a delay of 1 second, hope this saves time for others!
Use Serial.readStringUntil(char ofChoice) instead, this reads the buffer into a String, but quits when it has reached the given char.
Buffer = "Hello world";
// Serial.readString() does:
delay(1000);
return Buffer;
result : "Hello world"
// Serial.readStringUntil("o") does:
return BufferUntilChar("o")
result : "Hello wo"