https://devzone.nordicsemi.com/f/nordic-q-a/8142/a-question-about-openocd-nrf51822I believe what I am asking is extremely specific, but keeping hope that I might get some direction I have used a clone ST- Link v2 programmer to download code into a NRF51822 Cortex M0 SOC from Nordic. In short, I have been following this guide hereen-USTelligent Community 13Wed, 22 Jul 2015 23:59:02 GMThttps://devzone.nordicsemi.com/thread/29257?ContentTypeID=1Wed, 22 Jul 2015 23:59:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:86c2f566-9b16-47a2-8111-64fecbac11dbNguyen Hoan Hoang<p>I have nRF51822 with HWID 0x58. No problem flashing with OpenOCD using a CMSIS-DAP jtag. See <a href="http://embeddedsoftdev.blogspot.ca/p/idap-link.html">here</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/29256?ContentTypeID=1Wed, 22 Jul 2015 14:04:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0134da69-e4bc-46ba-9454-d141ef883619H&#229;kon Alseth<p>Hi Rubin,</p> <p>Don&#39;t worry, it&#39;s not a clone device. We are in the process of shifting out the usage of &quot;HWID&quot; field as an identifier, as this is subject to change on many factors, which makes it not-ideal to use for recognition.</p> <p>What you really want to verify by reading the HWID is which revision of the hardware that you are running on, so that you can figure out what SDKs/SoftDevices etc that is compatible for your device.</p> <p>This can be done by running the library located in this folder:</p> <pre><code>\nRF51_SDK_9.0.0\components\libraries\ic_info </code></pre> <p>It seems that openocd does a check on the HWID value, which I would not recommend doing. Reading out the IC revision and RAM/CODE size from NRF_FICR structure is the proper way of doing this for the nRF51-series.</p> <p>Cheers, Håkon</p><div style="clear:both;"></div>