https://devzone.nordicsemi.com/f/nordic-q-a/83939/gpio-output-levels-won-t-go-to-3-3vHi all, I&#39;m working on the nrf5340 with a modified mesh light sample and nrf connect sdk 1.7.1 I&#39;m measuring from P0.28 which is also LED1 to the GND. After programming the zephyr.hex with Programmer v2.2.0, I run .\nrfjprog.exe --family nrf53en-USTelligent Community 13Sat, 22 Jan 2022 12:59:37 GMThttps://devzone.nordicsemi.com/thread/349060?ContentTypeID=1Sat, 22 Jan 2022 12:59:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc932a4d-66c1-4ea2-95b9-78f9ffe9863cTurbo J<p>Try setting the pin to high drive mode (H0H1).</p> <p>If the LED was still connected to the pin, it will &quot;load&quot; the pin down a bit due to the current flowing into the LED. Normal pin mode has a lower current limit, thus you see a voltage drop across the output.</p><div style="clear:both;"></div>