nrf9151dk not running firmware without USB connection

RE: nrf9151dk not running firmware without USB connection

Øyvind — Wed, 28 May 2025 08:49:17 GMT

[quote user="oys"]are you able to provide more information on your setup? I.e. can you provide an image of your setup showing how the device is connected to the breadboard?[/quote]

Any updates on this? How is the breadboard and the DK connected?

[quote user="Redrield"]specific breakout board we're using specifies a max current of 1A. I took a look at the documentation provided[/quote]

Could you share more information on this?

RE: nrf9151dk not running firmware without USB connection

Redrield — Tue, 27 May 2025 16:23:02 GMT

The specific breakout board we're using specifies a max current of 1A. I took a look at the documentation provided, and even during transmission bursts it seems like that should still be plenty

RE: nrf9151dk not running firmware without USB connection

Øyvind — Tue, 27 May 2025 15:59:58 GMT

[quote user="Redrield"]The battery is connected to a 3.7-5V boost converter, whose output is connected to the 5V pin on the devkit[/quote]

What is the output current of this boost converter? Sounds like there might too little power from the setup? Have a look at the VDD current consumption in nRF9151 Hardware Design Guidelines. Where is states:

Although the typical current consumption of nRF9151 can be very low, the power supply and system must be designed to meet the demands of the potential worst-case level of current consumption.

[quote user=""]assess the power usage (& thus possible operating time) of the device on battery.[/quote]

Have you measured the average current consumption of the DK with e.g. PPK2?

Kind regards,
Øyvind

RE: nrf9151dk not running firmware without USB connection

Redrield — Tue, 27 May 2025 15:41:00 GMT

Hello Øyvind,

[quote userid="77062" url="~/f/nordic-q-a/121825/nrf9151dk-not-running-firmware-without-usb-connection/537230"]How is this battery pack connected and powering the board? [/quote]

The battery is connected to a 3.7-5V boost converter, whose output is connected to the 5V pin on the devkit

[quote userid="77062" url="~/f/nordic-q-a/121825/nrf9151dk-not-running-firmware-without-usb-connection/537230"]Just to confirm, the USB cable is disconnected during this operation? How do you know the FW is not running?[/quote]

The USB cable is disconnected during this operation. The board is configured to connect via TLS to a server I've written. No connection is received after waiting minutes with the board only powered by the battery. When USB is connected the board connects within one minute.

RE: nrf9151dk not running firmware without USB connection

Øyvind — Tue, 27 May 2025 15:22:51 GMT

Hello Kaitlyn, are you able to provide more information on your setup? I.e. can you provide an image of your setup showing how the device is connected to the breadboard?

[quote user=""]There is a 3.7V LiPo battery pack powering the breadboard to help in evaluating this.[/quote]

How is this battery pack connected and powering the board?

[quote user=""]When power is applied via the LiPo, LED2 turns on (solid/very subtle blinking), LED5 turns on (Blinking rapidly) and firmware does not run.[/quote]

Just to confirm, the USB cable is disconnected during this operation? How do you know the FW is not running?

Kind regards,
Øyvind