https://devzone.nordicsemi.com/f/nordic-q-a/49820/twi-with-nrf52dkhi I connect AT24C02 EEPROM with nrf52dk. I already test EEPROM with arduino and it work fine. Now i want to communicate with NRF52DK kit,so which example I would prefer for that in seger emb. studio ??twi_master_with_twis_slave ?? I connect SCLen-USTelligent Community 13Thu, 18 Jul 2019 15:02:34 GMThttps://devzone.nordicsemi.com/thread/199341?ContentTypeID=1Thu, 18 Jul 2019 15:02:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e5ac653c-c9a3-447b-ab5e-8e8f2dee9358nngohel<p>Thank.</p> <p><code>twi_master_with_twis_slave was run success fully.&nbsp;</code></p> <p>now if i want to read particular only one address of my EEPROM and sent to BLE.</p> <p>1st i want to do this only.<img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/IMG_5F00_20190718_5F00_201902.jpg" /></p> <p><code></code></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/198562?ContentTypeID=1Mon, 15 Jul 2019 20:45:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81110b93-7a50-4647-8f5e-350c7d80a929awneil[quote userid="80909" url="~/f/nordic-q-a/49820/twi-with-nrf52dk"]Would anyone help me to start my twi with nrf52dk[/quote] <p><a href="https://www.avrfreaks.net/comment/1138166#comment-1138166" rel="noopener noreferrer" target="_blank">As for any microcontroller</a>, before TWI, I would recommend that you start by getting familiar with some simpler examples; eg,</p> <p><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/gpio_example.html">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/gpio_example.html</a></p> <p><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/uart_example.html">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/uart_example.html</a></p> <p>Also practice using the debugger:</p> <p><a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_gsg_ses%2FUG%2Fgsg%2Fdebug.html">https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_gsg_ses%2FUG%2Fgsg%2Fdebug.html</a></p> <p>These will be invaluable in getting further projects working.</p> <p>Moving on to TWI</p> <p>The place to start is the <strong>TWI Scanner</strong> example - that will verify that you have connectivity to your Slave.</p> <p><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/twi_scanner_example.html">infocenter.nordicsemi.com/.../twi_scanner_example.html</a></p> <p>You really need to have an oscilloscope or analyser so that you can see what is happening on the wires.</p> <p>Once you have verified the connection, you can use the TWI Master example to communicate with your EEPROM:</p> <p><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/twi_master_with_twis_slave_example.html?cp=5_1_4_6_45_1#twi_master_with_twis_slave_example_master">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/twi_master_with_twis_slave_example.html?cp=5_1_4_6_45_1#twi_master_with_twis_slave_example_master</a></p> <p>(The nRF52 is the Master; your EEPROM is the Slave).</p> <p>For general introductions to Nordic, see:</p> <p><a href="https://www.nordicsemi.com/Get-Started">https://www.nordicsemi.com/Get-Started</a></p> <p><a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/introduction-to-bluetooth-low-energy-and-ble-devel">https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/introduction-to-bluetooth-low-energy-and-ble-devel</a></p> <p></p> <p>How to properly post source code:</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/4278._5F00_Insert-Code-_2D00_-Nordic.png" /></p><div style="clear:both;"></div>