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mcmichael
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Joined: 03/11/2013
Location: Germany
Posts: 2

Posted: 09:31pm 30 Nov 2013

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Hi Experts,

I'm trying to read values from a pin and all I'm getting are rubbish values.

In the program I wrote:

SETPIN 1,1
PRINT PIN(1)

I connected a variable resistor (potentiometer) to GND, 5V and I/O Pin 1.

The values jump from 0.1 to 0.7 and are not referenced to the input value.

What am I doing wrong?

Thanks,
Michael

palcal

Guru

Joined: 12/10/2011
Location: Australia
Posts: 1873

Posted: 10:13pm 30 Nov 2013

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Michael,
Try

SetPin 1,1
V=Pin(1)
Print V
Paul.

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

palcal

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Joined: 12/10/2011
Location: Australia
Posts: 1873

Posted: 11:51pm 30 Nov 2013

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Michael,
Your code should work the only reason I suggested the change is because it is what I have used to read the value from a temperature sensor, and it works fine.
But I just had a thought, make sure you have actually connected to pin 1 it can get confusing. If pin 1 is floating you probably will get funny readings.
Paul.

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

TassyJim

Guru

Joined: 07/08/2011
Location: Australia
Posts: 6100

Posted: 09:34am 01 Dec 2013

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Pin 1 has a maximum allowed input of 3.3V. Connect your pot to 3.3, not 5V.

With the readings your are getting, I agree with Paul, you have an open circuit or floating input.

Jim

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paceman
Guru

Joined: 07/10/2011
Location: Australia
Posts: 1329

Posted: 02:59pm 01 Dec 2013

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Another possibility is your Gnd reference. Are you using the Maximite Gnd and 3.3v - if not, try them.

Greg

mcmichael
Newbie

Joined: 03/11/2013
Location: Germany
Posts: 2

Posted: 06:17am 02 Dec 2013

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Hello Experts,

thank you vermy much for your replies - I've found the mistake.
It was none of the leads you mentioned - I looked at
the connection diagram the wrong way around.

Now everything is fine and my joystick is working.

have a good time!

Bye,
Michael

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