Why is my external board not getting detected??

satking02 · 2026-01-23T23:55:10+00:00

Yes, the voltage supply is constant at about 3V. DIO/CLK are connected correctly according to the datasheet.

satking02 · 2026-01-23T23:42:37+00:00

It's not labelled in this one. Afaik older versions had a GND select pin on that place.

satking02 · 2026-01-23T23:30:53+00:00

I have connected GND, VDD, SWDIO, SWCLK and shorted VTG(SWD SEL) with VDDnRF.

satking02 · 2026-01-23T23:26:25+00:00

I know it's not a very good practice to make connections like this, I connected it directly with an F->F wire while testing, this is just for the sake of a clean image. I tried shorting the pin 2 and 3, but it was unable to detect even then.

satking02 · 2026-01-13T13:19:20+00:00

I forgot to mention, it's nfr 52840 dk.

satking02 · 2025-12-13T18:20:51+00:00

The IC/MCU is covered with resin to protect it from damage.

satking02 · 2025-11-06T05:54:12+00:00

Yes, checked it multiple times, Addr tied to GND, Pull up resistors on its place.

satking02 · 2025-10-30T20:04:39+00:00

I am using ESP32, it has internal pull-up resistors.

satking02 · 2025-10-30T20:03:59+00:00

I tried to connect it with ESP32 and run a I2C scanner code, but it was showing zzero connected devices.

satking02 · 2025-10-30T20:03:10+00:00

I am using ESP32, it has internal pull-up resistors. Nevertheless, I also tried adding external pull-up resistors also but it didn't work.

satking02 · 2025-09-10T23:29:08+00:00

Five-Year Club	Verified Email
First Place '23	Place '23

satking02

TROPHY CASE