https://devzone.nordicsemi.com/f/nordic-q-a/24774/nrf52840-twim-drive-strengthHi, On my single I2C Bus, I have interfaced 4 I2C slave devices.. Now my voltage level of this bus behaves randomly. sometimes It shows 3.3V, but most of the times It stays 1.6V, due to this 2 out of 4 devices are not responding. 2 of them are respondingen-USTelligent Community 13Mon, 04 Sep 2017 05:13:22 GMThttps://devzone.nordicsemi.com/thread/97554?ContentTypeID=1Mon, 04 Sep 2017 05:13:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:91d091a7-5254-4e20-850e-c3880516bfc6vishal<p>Solved,</p> <p>One of the device was creating the problem, by removing it, remaining sensor worked fine, without having the voltage drop of I2C Lines.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/97553?ContentTypeID=1Wed, 30 Aug 2017 07:43:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fd318caf-336c-43bd-9fcc-d1b812890620MartinBL<p>Could this be related to <a href="https://devzone.nordicsemi.com/question/165514/nrf52840-twim-always-gives-drv_twi_err_anack/">your other issue</a>?</p><div style="clear:both;"></div>