NRF52840 Dongle with LIS3DH BLE

[George182]

Hi,

Is there any example that can show me how to get the accelerometer values from a LIS3DH to send via BLE peripheral to central, both being nRF52840 Dongles. I just want to toggle a relay when the peripheral is in motion, but searching through all the LIS3DH examples, I am still not able to make any progress... Please help!

[Kenneth]

Hi,

I believe the sensor is used in the smart remote 3 firmware, maybe that can be used as reference:
https://www.nordicsemi.com/Software-and-Tools/Reference-Designs/nRFready-Smart-Remote-3-for-nRF52-Series/Download#infotabs 

I assume a good starting point may be to use BLE Blinky Application in the nRF5SDK and then add the required drivers and modules.

Best regards,
Kenneth

[George182]

Thanks for the reply Kenneth. I downloaded and tried to search for a place in the Smart Remote Firmware, but I am not able to find the place where the values are being read, also this is written for the nRF52832 and not the nRF52840? I am very new to the Segger/Keil/Nordic environment, so excuse my lack of knowledge.

[Kenneth]

Look in: 

\nRF5x SDK-SR3
\examples
\ble_peripheral
\smart_remote_3_nrf52
\Source
\Drivers
\drv_acc_lis3dh.c

It's written for the nRF52832, however same TWI peripheral, so should not matter.

Best regards,
Kenneth