https://devzone.nordicsemi.com/f/nordic-q-a/78103/help-me-understand-twi-m-and-its-apiHello everyone I&#39;m doing my first steps so as to get things right from the start with a device based on the nRF52833 chip. My setup: PC &lt;USB&gt; nRF52840-DK &lt;JTAG&gt; CustomBoard (nRF52833) I am struggling to understand the TWI workflows and keep getting harden-USTelligent Community 13Mon, 02 Aug 2021 08:07:14 GMThttps://devzone.nordicsemi.com/thread/322800?ContentTypeID=1Mon, 02 Aug 2021 08:07:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3a0a9ba5-2db8-483a-8a88-3745c6c189afJared<p>Hi,</p> <ol> <li>Correct</li> <li>Correct</li> <li>Looking at the part of the datasheet that you included this seems very correct. If you&#39;re using the twi driver then you can either do a <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/group__nrf__drv__twi.html?cp=8_1_6_8_0_38_1_29#ga6c83eac2d358bc8fb5b53c53f22506b6">nrf_drv_twi_tx()</a><span>&nbsp;with the no_stop parameter as true, and then follow with a read with <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/group__nrf__drv__twi.html?cp=8_1_6_8_0_38_1_26#gab135f4b02e2f7dcd8db59f17063617ff">nrf_drv_twi_rx()</a>. Or you can do both with one function call <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/group__nrf__drv__twi.html?cp=8_1_6_8_0_38_1_31#ga44215084d42d6a29aa4044c3c2792fc0">nrf_drv_twi_xfer()</a>. Similar&nbsp;functions are available&nbsp;for the TWIM driver.&nbsp;</span></li> </ol> <p><span>Also, try probing the SCL and SDA line with a oscilloscope or a logic analyzer and see if the correct data is outputted from the nRF.&nbsp;</span></p> <p><span>regards</span></p> <p><span>Jared&nbsp;</span></p><div style="clear:both;"></div>