Thanks for the reply! The beeper is controlled by a transistor (limited 
with a resistor) so the current is within the margins.

I found a script to check the state of a pin:  findGPIO.js The output is;
P9_12 (gpio 60) mode: 7 (gpio1_28) 0x078 *pullup* Receiver Active

I checked other pins with this script, and P9_16 has this output;
P9_16 (gpio 51) mode: 7 (gpio1_19) 0x04c* pulldown* Receiver Active

I temporarely connected the base of the transistor to P9_16, and with this 
pin everything works perfectly. I however prefer to use pin P9_12 because 
of my circuit.

Is there a way to solve this by software, or will a simple pull down 
resistor do the trick?

Rob


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