https://devzone.nordicsemi.com/f/nordic-q-a/75277/problem-with-combining-i2c-and-spi-peripheralsHi. I am a beginner with nrf52840. Trying to get SPI and an I2C peripheral working at the same time using the SEGGER Embedded Studio. I have working version of both the I2C peripheral and the SPI peripheral. Now I combined both peripherals and tried toen-USTelligent Community 13Tue, 18 May 2021 12:23:16 GMThttps://devzone.nordicsemi.com/thread/310148?ContentTypeID=1Tue, 18 May 2021 12:23:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cb3a4a33-7963-49a2-a223-efbff50fb10cawneil<p>given that you have SPI and I2C working separately, you should be&nbsp;able to see in either/both of those project how and where the problem symbols <em>should</em> be defined...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/310121?ContentTypeID=1Tue, 18 May 2021 11:38:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2c29c4a9-d636-45ce-9ef3-7491d428b38cAbhi_VJ<p>Thank you awneil. I will check the sdk_config.h</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/310116?ContentTypeID=1Tue, 18 May 2021 11:23:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c142f01b-31fb-4080-bd42-13a45f38f3d0awneil<p>Sounds like you haven&#39;t properly configured the sdk_config.h</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/43538/merging-ble-examples">devzone.nordicsemi.com/.../merging-ble-examples</a></p><div style="clear:both;"></div>