![]() ![]() I understand that the GY521 stores data in a FIFO buffer and uses an interrupt signal to tell arduino when there is data ready (to prevent buffer overflow). I now wonder if problem may be one of software. The problem now vanishes – the DMP works fine! To test both of these, I soldered the GY 521 back into the circuit but disconnected the SDA and SCL lines of the WiiCam. Or maybe another part of the circuit is interfering (i.e. Maybe my 1m length of wire is adding impedance (?) and causing problems.I added some on both the 3.3V side and the 5V side, as shown in attachements 5, 6 & 7, but no difference I only have 6.5k or 16k, so tried the former. I’d forgotten pull up resistors, so I added some.To test this, I de-soldered it from my circuit and tested again with the breadboard. ![]()
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