https://devzone.nordicsemi.com/f/nordic-q-a/21567/nrf51822---jlink-0-76vHello, I connected the nrf module to jlink as described: • vdd(nrf)-----3.3V • gnd(nrf)-----gnd • SDO(nrf)-----SWDIO(jlink) • SCLK(nrf)-----SWCLK(jlink) • 3.3V------VTref(jlink) • gnd------gnd/pin20(jlink) After executing jlink.exe Ien-USTelligent Community 13Tue, 25 Apr 2017 06:22:25 GMThttps://devzone.nordicsemi.com/thread/84703?ContentTypeID=1Tue, 25 Apr 2017 06:22:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b5151379-4d4e-49e0-8c83-ad26d40f25b7bjorn-spockeli<p>Agreed, but its good that it works now :)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84702?ContentTypeID=1Mon, 24 Apr 2017 20:44:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:607ca5a0-39d0-4026-9697-a04b5b421a06normanfust<p>Replaced all the wires and it worked. Checked the removed wires for conductivity and they all seem to be ok. Strange issue.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84701?ContentTypeID=1Mon, 24 Apr 2017 14:03:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:651a2e4e-56c2-45cd-b982-e6a16c4dccf7bjorn-spockeli<p>Ok, just letting you know.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84700?ContentTypeID=1Mon, 24 Apr 2017 13:56:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:90fce5ed-2420-4224-b189-a73b761c5bfdnormanfust<p>I don&#39;t have a DK form nordic, nor I want one. I prefer a jlink which is more generic.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84699?ContentTypeID=1Mon, 24 Apr 2017 13:30:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ff7513ab-0371-465e-9ed9-5072b91c63e7bjorn-spockeli<p>Do you have a nRF51 or nRF52 DK? You can use that to flash other nRF5x devices with the JLink OB programmer on the DK.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84698?ContentTypeID=1Mon, 24 Apr 2017 13:29:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ab8e5396-d90a-4ae3-8092-f0192ee2fc5fnormanfust<p>I go with the standard for beginners yunjia module. Unfortunatelly I have a jlink v8 clone (could be bricked?) but I am thinking of ordering the EDU.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84697?ContentTypeID=1Mon, 24 Apr 2017 12:39:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:339e1514-0afd-47ee-9fd3-5e751d6e7555bjorn-spockeli<p>Can you provide a link to the nrf module you&#39;re using? Also which J-Link Programmer are you using?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84696?ContentTypeID=1Mon, 24 Apr 2017 11:19:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ee4c22fd-dd46-4c3c-bc9e-32b1a17f21a0normanfust<p>Yes, it is 3.3V</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84695?ContentTypeID=1Mon, 24 Apr 2017 11:04:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:398ad566-1da3-4813-bd6e-1db15386cbf1bjorn-spockeli<p>Have you measured that VDD on the nRF51822 module is actually 3.3V?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84694?ContentTypeID=1Mon, 24 Apr 2017 10:50:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:28f09ec9-ec5b-49b7-9d74-61032e0cc50enormanfust<p>@Turbo J already did, @Bjorn Spockeli from an arduino which has a 3.3 V output To make things more clear at the input of BLE I have 3.3V but jlink reads around 0.75V instead.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84693?ContentTypeID=1Mon, 24 Apr 2017 10:46:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d5355db5-e581-43f8-8d2d-5f6f337f8501bjorn-spockeli<p>Are you powering your nRF module from an external supply or battery?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84692?ContentTypeID=1Mon, 24 Apr 2017 10:02:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2cdf4071-737c-42fd-aa3a-c940554d22c5Turbo J<p>Triple-check the cable connections.</p><div style="clear:both;"></div>