Thingy low-power accelerometer

When Thingy is in low-power sleep mode, any user interaction will be detected by the accelerometer, which will then wake up the device.

The accelerometer has an I²C interface and it can detect motion on three axes. It is connected directly to the voltage regulator output so it is powered regardless of the VDD power control, see Power supply for more information. For this reason, the I²C interface is separated from the rest of the sensors of the board, and the accelerometer is connected to the same I²C bus that is available externally. If external I²C units are connected, they must not use the I²C address used for the low-power accelerometer (0x19).

Figure 1. Low-power accelerometer schematic

By default, the INT1 line of the accelerometer is connected to nRF52832. If you want to use the INT2 line instead, cut the short on SB9 and solder SB10.

Figure 2. Low-power accelerometer interrupt line selection