Connecting open collector sensor to pin 12 (MISO)

Using Arduino Sensors
#1

Hi, I'm using Arduino 1. I'm detecting movement through an open collector sensor. Also I'm using a Sparkfun mp3 shield and the library Sparkfun-MP3-Player-Shield-Arduino-Library/SFEMP3Shield at master · madsci1016/Sparkfun-MP3-Player-Shield-Arduino-Library · GitHub

The idea is to reproduce an audio file once movement has been detected.

I'm connecting the sensor to pin 12 which as I have read corresponds to MISO. I'm able to have a loop where I'm detecting movement and reproduce the audio file once, but after a while it just stop working, it keeps detecting movement but not play the audio.

I'm not sure if I shouldn't connect the sensor to pin 12, because somekind of conflict.

Please help.

#2

You've ruled out the mp3 shield?
You're able to make it play a file many times through programming?

Have you connected an external pullup resistor to the input or are you using INPUT_PULLUP? (Either way, but one or the other.)

#3

I'm using INPUT_PULLUP. I'm able to make it play several times, but then, I still don't know the reason, it freezes trying to play it again.

#4

So, if you add a Serial.print line to your sketch
Serial.print ("Play_It!");
that'll show up in Serial Monitor every time, but the mp3 doesn't go?

#5

Yes, but is stuck trying to play.

#6

jebema:
Yes, but is stuck trying to play.

What do you mean by stuck, do you see the message just before it is due to play and then it doesn't?

#7

It keeps waiting the function PlayTrack which does not return any value.

#8