Serial Problems - ParseInt / available not working

[s1ck 0]

Hi

 

When trying to run following code, I can send the first integer "1" but if I continue after that, it just doesnt send anything back.

However, with an Arduino UNO this code works 100%. How can I fix that?

I hope somebody can try that for me, so I can confirm that it's the hardware/library and not the code.

 

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

void loop()
{
  if( Serial.available() > 0 )
  {
    int inc = Serial.parseInt();
    if(inc == 1)
    {
      int temp = analogRead(0);
      int pressure = analogRead(1);
      
      String t_str = String(temp);
      String p_str = String(pressure);
      String string = t_str + "#" + p_str + ".";
      Serial.println(string);
    }
  }
}

Thanks in advance.

[energia 484]

The issue is analog channel 1 (aka A1). Channel A1 maps to pin 3 which is UART TXD as per pin mapping here: https://github.com/energia/Energia/wiki/Hardware. A2 is also a no go since that maps to pin 4 which is UART RXD. Change analogRead(1) to analogRead(3) and you will see that it runs perfectly fine.

[s1ck 0]

Wow thank you very much, it's working now.

I should have guessed that though

[timcastelijn 0]

Hi Energia, S1ck,

 

does this mean it is not possible to read 6 analog inputs and send over serial, when hardware UART is enabled?

 

I try to read 6 potmeter-values using the code below, but when R=0 or R=? at A2 the Serial output stops (i.e no new lines appear).  Do you have any suggestions how to work around this?

void setup() {
  Serial.begin(9600); // msp430g2231 must use 4800
  
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  pinMode(A4, INPUT);
  pinMode(A5, INPUT);
}

void loop() {
  int sensorValue0 = analogRead(A0);
  delay(20);
  int sensorValue1 = analogRead(A1);
  delay(20);
  int sensorValue2 = analogRead(A2);
  delay(20);
  int sensorValue3 = analogRead(A3);
  delay(20);
  int sensorValue4 = analogRead(A4);
  delay(20);
  int sensorValue5 = analogRead(A5);

  
  delay(40);
   
  Serial.print(sensorValue0);
  Serial.print(" ");
  Serial.print(sensorValue1);
  Serial.print(" ");
  Serial.print(sensorValue2);
  Serial.print(" ");
  Serial.print(sensorValue3);
  Serial.print(" ");
  Serial.print(sensorValue4);
  Serial.print(" ");
  Serial.println(sensorValue5);
}

[L.R.A 78]

 

Hi Energia, S1ck,

 

does this mean it is not possible to read 6 analog inputs and send over serial, when hardware UART is enabled?

 

I try to read 6 potmeter-values using the code below, but when R=0 or R=? at A2 the Serial output stops (i.e no new lines appear).  Do you have any suggestions how to work around this?

void setup() {
  Serial.begin(9600); // msp430g2231 must use 4800
  
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  pinMode(A4, INPUT);
  pinMode(A5, INPUT);
}

void loop() {
  int sensorValue0 = analogRead(A0);
  delay(20);
  int sensorValue1 = analogRead(A1);
  delay(20);
  int sensorValue2 = analogRead(A2);
  delay(20);
  int sensorValue3 = analogRead(A3);
  delay(20);
  int sensorValue4 = analogRead(A4);
  delay(20);
  int sensorValue5 = analogRead(A5);

  
  delay(40);
   
  Serial.print(sensorValue0);
  Serial.print(" ");
  Serial.print(sensorValue1);
  Serial.print(" ");
  Serial.print(sensorValue2);
  Serial.print(" ");
  Serial.print(sensorValue3);
  Serial.print(" ");
  Serial.print(sensorValue4);
  Serial.print(" ");
  Serial.println(sensorValue5);
}

I sugest using a multiplexer. Using 3 digital ports i belive you can control the multiplexer. Then you read each analog input in 1 analog port, for example. Just not at the same time but each one in short intervals

[spirilis 1,264]

Remember A6 and A7... as long as you don't need I2C or SPI communication.

 

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