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Hi, everyone. I purchased a full set of ArduPilot from DIY Drones store. Now I encountered a problem in testing XY sensor

http://store.diydrones.com/ProductDetails.asp?ProductCode=SE-0002-01.

Today after I load the test programme into the ArduPilot board and plug XY sensor into the main boad, no matter how I tilt the XY sensor, the readings of X and Y sensor in the serial window all the time are: X: 461, Y: 547. Merely no change at all. Pls find figure 1.

Even I get it close to 300℃ heater, pls see figure 2 readings, small changes occur, but as I know in real time flight, the model plane can impossibly encounter such high temperature.

However, the readings of Z sensor in the serial window are normal and correct. I also check the wires connection and the programme I utilize, all are no problem. Besides, X and Y readings are correct when I plug another brand XY sensor into the main board and tilt it. See figure 3.

So can anyone help to tell:

1. What is the potential reason for this phenomenon?

Figure 1.jpg

Figure 2.jpg

Figure 3.jpg