Arduino nano connect RP2040 pin A7 and A6

[luly8702]

Hi,
I have a problem reading the datasheet of my arduino card (Arduino nano connect RP2040) . Can i use pin A6 and A7 on 12 bits or these only for the Nina W102 (U2) ? How to do ?
Because with these program i read only on 10 bit.

// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue1 = analogRead(A6);
  int sensorValue2 = analogRead(A7);
  // print out the value you read:
  double voltage = (sensorValue2 - sensorValue1)*(5/pow(2,12));
  Serial.println(sensorValue1);
  Serial.println(sensorValue2);
  Serial.println(voltage);
  double courant = voltage/50.0;
  Serial.println(courant);
  delay(1);        // delay in between reads for stability
}

Thanks

[Grumpy_Mike]

@luly8702

Can i use pin A6 and A7 on 12 bits

No the RP2040 only has four channels of A/D in it.

@luly8702

these only for the Nina W102

No hits for Nina W102 found on the internet. What is it and is it spelt correctly?

[oqibidipo]

@Grumpy_Mike

No hits for Nina W102 found on the internet.

Your Internet is broken.
First Google search result for "nina w102": NINA-W10 series (open CPU)

[camsysca]

FYI,
As an aside, I'd think the four Serial.print() calls after the analog reads (presuming you find the right pins) would be more than enough delay (even at much higher baud rates than 9600), so your delay(1) (a millisecond!) is pretty much superfluous.
C

[Grumpy_Mike]

The nano connect has not only the RP2040 but also a Dual Core 32-bit Arm® Cortex®-M0+ Processor, that is where the analogue inputs are coming from.

@oqibidipo

Your Internet is broken.

Yes it was, well not so much the internet but the search engine I was using.

[sjmill01]

Did you ever find a solution for using A6 as an analog input?

I have this problem as well. All documentation shows A6 is tied to the Nina but can be used simply as an Analog (A6) pin. However, it appears to be pulled up with the internal resistor rendering it useless as an analog pin. Using pinMode(A6,INPUT) doesn't prevent the pullup.

Thanks,
Sean