https://devzone.nordicsemi.com/f/nordic-q-a/5169/oled-2864-ssd1306-does-not-operateHI, I try to turn on the OLED. I can not confirm that the lights turned on I want to change background color. What should I do? Currently being output as shown below. and Source Was uploaded. twi_sw_master_example (2).zip Test_Sourceen-USTelligent Community 13Sun, 10 Apr 2016 21:22:00 GMThttps://devzone.nordicsemi.com/thread/18111?ContentTypeID=1Sun, 10 Apr 2016 21:22:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e87d36c6-e783-4080-92d1-7e1f9e5b6bf6Ady<p>in this source, the pin mappings are as follows</p> <p>#define I2C_SDA_PIN 6 #define I2C_SCL_PIN 7 #define I2C_RES_PIN 8</p> <p>What pins would these be on the nRF52 DK?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/18110?ContentTypeID=1Fri, 30 Jan 2015 09:59:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:025e3536-5920-41cf-9709-08925328037cStian R&#248;ed Hafskjold<p>Seems like you have gotten a bit further since you posted this question. Did you manage to initialize the screen after you wrote this post: <a href="https://devzone.nordicsemi.com/question/24507/oled-2864-i2c-communication-help/">devzone.nordicsemi.com/.../</a> ?</p> <p>If you managed to initialize the screen but can not change the background color of the screen, you really have to read the datasheet for the SSD1306 in order to send the right commands over TWI.</p> <p>If the problem is that you can&#39;t set up the TWI correctly on one of the Nordic chips, you have to say this in your question, and also specify which Nordic chip you use. (And SDK version)</p><div style="clear:both;"></div>