User's Guide

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Nordic nRF52 App
 Modify Nordic SDK path
 In Nrf52App/usi_evb/s132/armgcc/Makefile
 SDK_ROOT := <CHANGE_THIS_TO_YOUR_NORDIC_SDK_PATH>
 Modify to internal RC oscillator

In Nrf52App/usi_evb/s132/config/sdk_config.h
#define NRFX_CLOCK_CONFIG_LF_SRC 0
#define NRF_SDH_CLOCK_LF_SRC 0
#define NRF_SDH_CLOCK_LF_RC_CTIV 16
#define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 4
#define NRF_SDH_CLOCK_LF_ACCURACY 1
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Reference : https://github.com/Azure/azure-sphere-samples/tree/master/Samples/WifiSetupAndDeviceControlViaBle