can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 02 Apr 2026 10:07:54 GMT

Hello,

After spending time on this, the Radio test is now working on my custom PCB, but as said, the lab request me the DTM instead of the radio mode.

I compiled the DTM sample code for my custom PCB (only possible with SDK 2.9.2 and toolchain 3.2.4, others are not building!), I can flash it and comunicate with by uart.

However, when trying to test DTM with 2 devices, one transmitting [0x80 0x00], second device receiving [0x40 0x25], after some seconde, when I stop the receiving [0xC0 0x00], it returns the code 0x80 0x00, this means receiver hasn't see any correct packets. on the transmitter, on stop, it reply the good number of sent packets.

The interesting point is :the transmitter reply the number of sent packet only when the receiver in in receive mode, otherwise it reply also 0x80 0x00.

Why ? normally the receiver must reply the same number of sent packets ??

What doese it means ? any FW issues ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Mon, 30 Mar 2026 11:13:49 GMT

Hello Kennet,

after checking with lab, they are not accepting the radio test, they really need the DTM implemented, as the goal is to certificate wildword the device, and they en the DTM that is only used by any labs.

I tried to compilate the DTM sample, but unfortunately, it didn't build correctly witht the nRF52833dk_nrf52833 board... can you check this ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Fri, 27 Mar 2026 13:49:11 GMT

ohhh nice this make my PCB working with the standard Radio test sample.

perfect ....thank you ...

Just before closing the topic, can you tell me which command make/refer to each lines https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/peripheral/radio_test/README.html#user_interface:

• Selection of TX and RX modes

• Selection of BLE channels:

o Lowest channel

o Middle channel

o Highest channel

• Continuous transmission with duty cycle ≥ 98%

• Transmission at maximum power

• PRBS9 modulation

• Standalone operation, without dependence on the mobile application

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Fri, 27 Mar 2026 13:01:10 GMT

Hello,

[quote user="christopheMon"]BUT if I use the debug mode in nrf connect, with the segger flasher connected, I start the debug, in this case the application is working even when I disconnect the segger. [/quote]

That was useful information yes, I can now see that you don't have DCDC circuitry in your design. It will default to LDO when debugging, so please add the following to the overlay file and try again:

&reg1 {
regulator-initial-mode = <NRF5X_REG_MODE_LDO>;
};

Updated the example also:

devzone.nordicsemi.com/.../radio_5F00_test_5F00_ncs_5F00_v3.2.4_5F00_ldo.zip

Kenneth

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Fri, 27 Mar 2026 12:01:40 GMT

Hello,

thanks for the code, however, after many tests, I saw:

1- All of the nordic samples codes are working on the DK

2- All of the nordic samples codes are crashing (not initializing) on my custom PCB.

3- Only my custom FW is working on my custom PCB.

The HW is quite same ( 32K not mouted on both, 32M mounted on both)

Also an important new point I saw: I tried the simple blinky code from Nordic. It only initialize a output and blink this output.

Issue is same (working on DK but not on my PCB). BUT if I use the debug mode in nrf connect, with the segger flasher connected, I start the debug, in this case the application is working even when I disconnect the segger.

So starting in debug with segger is working, but MCU starting by himself is crashing.

could it be some settings ? how to solve this issue ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Fri, 27 Mar 2026 00:39:54 GMT

In theory this is what you should need. Built for ncs v3.2.4.

west build -b nrf52833dk/nrf52833
west flash

devzone.nordicsemi.com/.../radio_5F00_test_5F00_ncs_5F00_v3.2.4.zip

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Wed, 25 Mar 2026 14:21:38 GMT

Hello,

today, I received the PCA10100 with the nrf52833 MCU. and tried for the radio test Sample:

1- HW with 32KHz + 32MHz, built "nrf52833DK_nrf52833" standard : Working OK

2- HW with 32KHz disconnected, built "nrf52833DK_nrf52833" standard : Crash on start and no init !

3- HW with 32KHz disconnected, built including 32K RC activation : Working OK

On my custom HW:

1- HW with only 32MHz, no 32KHz, FW of my application, board curstom for my application : working OK

2- HW with only 32MHz, no 32KHz, FW "radio test", built "nrf52833DK_nrf52833" standard : Crash on start and no init !

3- HW with only 32MHz, no 32KHz, FW "radio test", built "nrf52833DK_nrf52833" including 32K RC activation : Crash on start and no init !

Building with my cusom board is complicate because you are linking and using libraries that I need to add or modify, then lots of efforts to compile with my cusom board.

So it really seems that something your DK board is initializing, or using HW on your DK PCB that I don't have on my custom PCB.

Can you help me ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Wed, 25 Mar 2026 08:39:14 GMT

Hello,

any news ?

I really need to solve this issue as certification Lab is waiting on me....

In summarry, the 52832 DK is working, with and also without 32K Quartz, but custom PCB with 52833 without 32K is not starting ( no init, not periferals configured, no 32MHz oscillation).

But on this same custom board, the dedicated custome program is running well.

What differences ??

please

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Mon, 23 Mar 2026 13:50:11 GMT

can't it be an issue for the 52833 as it is not mentionned in the yalm file... ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Mon, 23 Mar 2026 13:24:46 GMT

Now simple project built correctly with visual studio code Build option.

but before I was building it with command: west build -b nrf52833dk/nrf52833

attached is my whole project ( radio test)devzone.nordicsemi.com/.../radio_5F00_test_5F00_CMO.zip

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Mon, 23 Mar 2026 13:15:33 GMT

Can you share the DTM project you have at the moment? And also how you build it?

Kenneth

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Mon, 23 Mar 2026 12:48:29 GMT

Hello again,

after some tests, I can built code on a DK 52832 that works well without the X2 Quartz mounted. So the PRJ.conf if working adding XTAL lines. also I can change the UART pin with the app.overlay. So the code seems ok.

However, on my final PCB, using the DK52833, addin same overlay and config lines, it is not working.

I see that the MCU don't start, no 32MHz on the cristal.

This means something is crashing on startup before or while initializing the CLOCK.

What could be different between the DK and a standatd custom PCB ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Mon, 23 Mar 2026 07:35:46 GMT

each time I build I do that... first I delete build then I build a new... the issue is not here... but my overlay seems still not taken in account

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Thu, 19 Mar 2026 19:01:21 GMT

Try a pristine build, or manually delete the build folder before building.

Kenneth

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 19 Mar 2026 14:24:50 GMT

after checking, the pin 0.22 is not configured.

No pull-up configured. without connections to the external FTDI device, the pin is always 0V.

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 19 Mar 2026 14:15:20 GMT

devzone.nordicsemi.com/.../3652.build.zip

herer is my build folder, in the zephyr.dts, I can't find the configuration....

Maybe it is the issue not ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Thu, 19 Mar 2026 13:54:51 GMT

In the build folder you can check zephyr.dts file.

Kenneth

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 19 Mar 2026 13:42:27 GMT

My overlay is now as :

/* overlay-dt.dts */

/*&uart0 {

status = "okay";

tx-pin = <24>;

rx-pin = <22>;

current-speed = <115200>;

};

&radio {

/delete-property/ dfe-supported;

};

&pinctrl {

uart0_default: uart0_default {

group1 {

psels = <NRF_PSEL(UART_TX, 0, 24)>;

};

group2 {

psels = <NRF_PSEL(UART_RX, 0, 22)>;

bias-pull-up;

};

uart0_sleep: uart0_sleep {

group1 {

psels = <NRF_PSEL(UART_TX, 0, 24)>,

<NRF_PSEL(UART_RX, 0, 22)>;

low-power-enable;

};

but still same on the pin 22 and 24 ...

How may I check if my overlay is really taken in account ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 19 Mar 2026 13:38:33 GMT

I just ordered a DK, I only have our custom PCBs. And connecting the pin 6 or 8 is impossible on my PCB as it is a QFN 73...

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Thu, 19 Mar 2026 13:29:21 GMT

Also, you can't set the pins like you have done, you need to use pin control, e.g.

&pinctrl {
	uart0_default: uart0_default {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 24)>;
		};
		group2 {
			psels = <NRF_PSEL(UART_RX, 0, 22)>;				
			bias-pull-up;
		};
	};

	uart0_sleep: uart0_sleep {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 24)>,
				<NRF_PSEL(UART_RX, 0, 22)>;				
			low-power-enable;
		};
	};
};

And keep pinctrl-0 = <&uart0_default>; and pinctrl-1 = <&uart0_sleep>; in &uart0.

Kenneth

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Thu, 19 Mar 2026 13:18:07 GMT

Do you have a DK for comparison? then you can just connect a wire between p0.22-p0.08 and p0.24-p0.06 to test the setup on a DK, the wires will connect the pins to the UART of the DK, and you can for instance open a virtual comport on the PC for testing.

Kenneth

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 19 Mar 2026 13:00:54 GMT

that's right, I don't have the 32k, only have the 32M

However It still don't work, see the pin voltage on the scope, yellow is the Tx from computer (MCU P0.22), sending a single char and purple is the MCU TxD P0.24 (= Computer RxD). Level of MCU TxD is not good ... and not working..

How can I debug it ?

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

Kenneth — Thu, 19 Mar 2026 12:46:16 GMT

Do you have external 32kHz crystal in your design? If not also set:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

[quote user="christopheMon"]

and activated in prj.conf:

CONFIG_UART_CONSOLE=y

CONFIG_SERIAL=y

CONFIG_UART_INTERRUPT_DRIVEN=y

CONFIG_UART_ASYNC_API=y # souvent nécessaire pour TX sur pins non-standard

[/quote]

Default settings should work.

Kenneth

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 19 Mar 2026 10:53:03 GMT

Hi again,

unfortunatly, it is still not working...

I compiled the radio_test on sdk_2.7.0, with the nrf52833dk/nrf52833.

It is building.

1- as I use my specific PCB and not the DK, I need to change the UART to pin 22(Rx) and 24(Tx).

Assuming the control line is the uart0, I did it in the overlay :

/* overlay-dt.dts */

&uart0 {

status = "okay";

tx-pin = <24>;

rx-pin = <22>;

current-speed = <115200>;

};

&radio {

/delete-property/ dfe-supported;

};

and activated in prj.conf:

CONFIG_UART_CONSOLE=y

CONFIG_SERIAL=y

CONFIG_UART_INTERRUPT_DRIVEN=y

CONFIG_UART_ASYNC_API=y # souvent nécessaire pour TX sur pins non-standard

However Nothing wirking on the pin 22 and 24.

2- can you tell me, in this code, there are 2 configured UART ? one for control and another for debug ?

where is printed the "printk("Starting Radio Test example\n");" ? and on which UART my I send and receive commands ?

Sorry about all my questions, but I really need the FW test, as the certification LAB is waiting on it...

RE: can't find board nrf52833dk_nrf5283 in bluetooth DTM sample

christopheMon — Thu, 19 Mar 2026 08:37:08 GMT

Ok I will try to use this one.

About the BLE version, as sephyr don't have specific stacks (s132, etc) as before in nordic, my application configuration is att the minimum. (4.1 I think) coz I m only configuring the minimum in my prj.conf:

#BLE config

CONFIG_BT=y

CONFIG_BT_PERIPHERAL=y

CONFIG_BT_DEVICE_NAME="XXX"

CONFIG_BT_DEVICE_APPEARANCE=833

CONFIG_BT_MAX_CONN=1

CONFIG_BT_MAX_PAIRED=1

# Enable the NUS service

CONFIG_BT_NUS=y

# Enable bonding

CONFIG_BT_SETTINGS=y

Then No Direction finding, long range or advanced features.

The application was also done on SDK 2.2.0, I will need to use it also for the test firmware for certifications.

It seems so complicate to have a working simple test FW...

I will try again...