https://devzone.nordicsemi.com/f/nordic-q-a/19469/problem-using-i2cHello Everyone) Have new unsolved problem. My custom PCB based on nrf52832 SoC has only controller, FXOS8700 accelerometer and MAX30205 health temperature sensor. For communication between ICs I&#39;m using I2C Bus, BUTTTTT (I&#39;m using mbed 5.0) when I tryen-USTelligent Community 13Mon, 06 Feb 2017 16:36:06 GMThttps://devzone.nordicsemi.com/thread/75619?ContentTypeID=1Mon, 06 Feb 2017 16:36:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:23df57ca-5133-4816-999a-1cf4a3853d9cAndrei<p>Thank You. Problem solved. Inside mbed was created uart instance....UART was disabled and all work...))))</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/75620?ContentTypeID=1Mon, 06 Feb 2017 13:19:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2f30dfb3-4c47-4179-a178-7dd140d8b0b6Andrei<p>I use standard HealthTermometer profile code, only added defining i2c bus. On all ports it works, if port5 is not used. port7 and port6 work fine....But I tried it only with DK. With my custom board I&#39;ve only tried 5 and 7,because other port are not available on PCB...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/75618?ContentTypeID=1Mon, 06 Feb 2017 13:08:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b4748e97-6459-4359-8194-4fbb54edeffbJ&#248;rgen Holmefjord<p>Do you use any UART communication in your code? Pin 7 and 5 is used på the UART interface on the nRF52 DK, so this might cause some problems in mbed if you have not changed the default pin defines. Could you post your code here or link to your project?</p><div style="clear:both;"></div>