https://devzone.nordicsemi.com/f/nordic-q-a/115915/nrf52805-custom-pcb-radio-is-not-workingHi all, We have designed a custom board including a NRF52805 chip. We also followed PCB design guidelines and used the exact PCB layout recommended by Nordic. As expected all the peripherals work but when testing for BLE it doesn&#39;t emit any BLE packeten-USTelligent Community 13Thu, 31 Oct 2024 07:58:38 GMThttps://devzone.nordicsemi.com/thread/508611?ContentTypeID=1Thu, 31 Oct 2024 07:58:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8bb16346-be81-4331-b559-4fb66037d8b3Asbj&#248;rn<div style="border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">Hello Bhanuka,</div> <div style="border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;"></div> <div style="border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">there are many reasons for why you might be troubleshooting custom HW. So let&#39;s check some of the typical steps and see:</div> <ol style="color:rgba(0, 0, 0, 1);direction:ltr;font-size:medium;font-style:normal;font-weight:400;letter-spacing:normal;list-style-type:decimal;text-indent:0;text-transform:none;white-space:normal;" start="1"> <li style="color:rgba(0, 0, 0, 1);font-size:11pt;"> <div style="border:0;color:inherit;direction:ltr;margin:0;padding:0;vertical-align:baseline;">How did you do the programming, did you get a successful feedback when programming the device and can you read back the some content from the device after?&nbsp;</div> </li> <li style="color:rgba(0, 0, 0, 1);font-size:11pt;"> <div style="border:0;color:inherit;direction:ltr;margin:0;padding:0;vertical-align:baseline;">Is the voltage to the nRF_VDD actually what you think they are? Have you measured them?</div> </li> <li style="color:rgba(0, 0, 0, 1);font-size:11pt;"> <div style="border:0;color:inherit;direction:ltr;margin:0;padding:0;vertical-align:baseline;">Is the program running in other aspects, toggling GPIOs or check the program counter for the device in debug mode if possible?</div> </li> <li style="color:rgba(0, 0, 0, 1);font-size:11pt;"> <div style="border:0;color:inherit;direction:ltr;margin:0;padding:0;vertical-align:baseline;">Is the 32MHz crystal starting up for the BLE transmission? Can you measure the oscillation on the XC1 pin to see if it runs at any point?</div> </li> </ol> <div style="border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;"></div> <div style="border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">Best regards</div> <div style="border:0;color:rgba(0, 0, 0, 1);direction:ltr;font-size:11pt;font-style:normal;font-weight:400;letter-spacing:normal;line-height:inherit;margin:0;padding:0;text-indent:0;text-transform:none;vertical-align:baseline;white-space:normal;">Asbjørn</div><div style="clear:both;"></div>