I've the VCNL 4000 Proximity Sensor I use some sample code and at the very beginning
the following code hangs (never finishes)
readVCNLByte(0x81); is called
Can this problem be caused because the contact of the pin isn't very good.
I only but the part with pins in the sensor without to solder it.
Is it likely that this may be the problem ? I have not many experince with solder and the sensor is really small so i'd like to avoid it for first tests 
Here the code. The last output in the Serial window is "pre product"
Serial.println("VCNL");
Wire.begin();
Serial.println("pre product");
uint8_t rev = read8(VCNL4000_PRODUCTID);
Serial.println("post product");
if ((rev & 0xF0) != 0x10) {
Serial.println("Sensor not found :(");
while (1);
}
If someone is hunting points at stackexchange i've the question also there: (hope double post is ok ? if not please tell me)
