https://devzone.nordicsemi.com/f/nordic-q-a/19397/twim-i2c-doesn-t-send-anythingHy everyone! I&#39;m trying to write a non-volatile memory position of a device via I2C (twi), the device, a flash memory is the slave. In my application, I have configure the twi, enable it, then, I send the data. But, in my event handler, any eventen-USTelligent Community 13Thu, 02 Feb 2017 15:19:19 GMThttps://devzone.nordicsemi.com/thread/75265?ContentTypeID=1Thu, 02 Feb 2017 15:19:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c051ead9-429f-459a-ad65-eb0405c3742dandribiotico<p>Finally I have solved the problem, first of all, to capture correctly the SCL and SDA signals, I have configured the triger of the oscilloscope and the mode in single, instead continous samples. The problem was that the signal wasn&#39;t correct, and this makes that the slave doesn&#39;t recieve all the bits of the device address correctly, so the respose hasn&#39;t ACK, this is the signal that caused me problems: <img src="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/IMG_5F00_20170202_5F00_140744.jpg" alt="image description" /></p> <p>Connecting a 2K2Ohms resistors in both SDA and SCL lines improves the signal quality, and the slave deice can &quot;undertand&quot; the bits (in this case I was trying random bytes and there isn&#39;t ACK in the response because this isn&#39;t my slave device address): <img src="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/IMG_5F00_20170202_5F00_140824.jpg" alt="image description" /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/75264?ContentTypeID=1Thu, 02 Feb 2017 09:00:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0d05ac13-06bf-452d-9830-d7d53e5a97b3andribiotico<p>that would be great! thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/75263?ContentTypeID=1Wed, 01 Feb 2017 16:53:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e1a33482-c9be-411a-859c-e13931535630Susheel Nuguru<p>I recently tested microchip EEPROM with TWIM driver from SDK. worked fine. I could quickly test your code tomorrow to see any anomalies.</p><div style="clear:both;"></div>