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Nordic Case Info
  • Case ID: 348903
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91X Quick Start

Simon

Hello,
checking if I'm doing this right of restoring initial fw for 91X to work with Quick Start v1.2.0. as described here in Get Started,
https://www.nordicsemi.com/Products/Development-hardware/Nordic-Thingy-91-X/GetStarted?lang=en#infotabs

Using programmer write to nRF91,
/thingy91x_mfw-2.0.2_sdk-3.0.0/img_app_bl/thingy91x_nrfcloud_multi_service_coap_2025-05-08_3bfc4657.hex

and to nRF53,
/thingy91x_mfw-2.0.2_sdk-3.0.0/img_app_bl/thingy91x_nrf53_connectivity_bridge_2025-05-08_3bfc4657.hex

Then connect 91X with USB to laptop and start Quick Start, except 91X is not recognized and nothing happens.
Tried this both on Ubuntu and Windows.
Log file output:

2025-07-24T00:15:10.400Z INFO Initialising the bundled nrfutil device
2025-07-24T00:15:10.409Z DEBUG Started watching devices
2025-07-24T00:15:11.827Z INFO Using the bundled core version for nrfutil device: 8.0.0
2025-07-24T00:15:12.021Z INFO Using nrfutil-device version: 2.7.5
2025-07-24T00:15:12.022Z INFO Using nrf-device-lib version: 0.17.41
2025-07-24T00:15:12.022Z INFO Using nrfjprog DLL version: 10.24.2
2025-07-24T00:15:12.022Z INFO Using JLink version: JLink_V8.18
2025-07-24T00:15:12.023Z INFO Your version of SEGGER J-Link (8.18) is newer than the one this app was tested with (7.94i). The tested version is not required, and your J-Link version will most likely work fine. 
If you get issues related to J-Link with your devices, use the tested version.

Upon receiving the 91X overwrote the chips for other tests without checking if Quick Start works out of the box.
I'm trying to get the 91X registered as a device on https://app.nrfcloud.com/ to view json data.
No issues writing thingy91x_hello.nrfcloud.com_v2.0.2.hex and viewing 91X data on https://hello.nrfcloud.com/.

thank-you,

  • 0

    Hi,

    Do you have an existing account on app.nrfcloud.com? You can look at Getting Started with nRF Cloud.

    Best regards,
    Dejan

  • 0 in reply to dejans

    Hello,
    I do have an account and a few devices registered with app.nrfcloud.com, and Getting Started with nRF Cloud link does not mention 91X as a device.
    Also, https://app.nrfcloud.com/#/add-device/lte-device does not mention 91X as a device either,
    Add LTE Device
    To add a device to your account, enter the device ID and PIN or HWID. For Nordic hardware like the nRF9160DK or Thingy:91, the device ID is "nrf-" followed by the 15 digit IMEI. Example: "nrf-123456789012345"

    In an earlier Nordic conversation, Tacker, Markus <[email protected]> mentioned that,
    You can add your Thingy:91 X to nrfcloud.com using the Quick Start app in nRF Connect for Desktop.

    (not sure if Markus is saying QS is for app or hello, but you can register 91X directly with hello).

    This is problematic as mentioned in my original case that I'm unable to have Quick Start recognize my 91X connected by USB directly to my laptop.
    Basically, is this the hex the same type that came originally with the 91X that will be recognized by Quick Start?
    Using programmer write to nRF91,
    /thingy91x_mfw-2.0.2_sdk-3.0.0/img_app_bl/thingy91x_nrfcloud_multi_service_coap_2025-05-08_3bfc4657.hex

    thank-you,

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