nrf_asset_tracker_v2 thingy91 accelerometer movement detection failed

[DevNetNow]

Hi 

testing with thingy91 v1.4.0, firmware 1.5.1.

I never succeeded to enable passive mode of nrf_asset_tracker_v2 no acceleration is detected. 

Someone experience the same issue?  

[DevNetNow]

Hi ,

back with update,

There is two use cases with different behaviors : 

Use case 1: External active GPS antenna disconnected

Following line in board_nonsecure.c file : 

#define AT_CMD_COEX0 "AT%XCOEX0=1,1,1565,1586" 

Then accelerometer and movement detection in passive mode OK, but no GPS position fix (very poor signal reception). 

Use case 2: External active GPS antenna connected

Following line in board_nonsecure.c file :  

#define AT_CMD_COEX0 "AT%XCOEX0" 

Then accelerometer and movement detection in passive mode stops working, with decent GPS position fix (better signal reception). 

I didn't see any hardware link of COEX0 and accelerometer signals... 

Any workarround is welcome 

Regards  

[Øyvind]

Hello, 

I will need to discuss this with our developers. Will get back to you within tomorrow.

Kind regards,
Øyvind

[DevNetNow]

Hi,

just in case it's specific to my antenna ? we never know, till we find the answer

I'm using Taoglas AP.25F, i didn't test with another antenna  

Regards

[Øyvind]

Can you provide some debug logs when running the application? Are you running the default application? Do you get any error numbers?

Kind regards,
Øyvind

[DevNetNow]

Hello,

No errors on logs, With the usb connected for logs there is no bug. just a big delay in passive mode settting (12 mins measured from passive mode setting request and the passive mode event log), then passive mode OK with GPS antenna connected. 

But, if i restart the device with passive mode activated without the usb cable only the first position is sent. then everything stops. 

i'll try with usb cable without the 5V signal, may be it's a voltage drop on antenna activation. 

Or I'll forward the logs to Bluetooth to get logs when device have no usb plugged. 

get back to you with Bluetooth forwarded logs. 

Is there a way to insert a file here, or should i put it somewhere and send a link ? 

Regards

[Øyvind]

Hi, can you please build the asset tracker with the debug overlay, which will add additional verbose logging capabilities to the application. 

Have your verified that you are using NCS v1.5.1? There is a known bug on the master branch that will cause the first GPS fix to hang. Our team is currently working on a fix for this, but in the meantime using v1.5.1 should be sufficient. Also, what modem version are you running on your device?

Another tip is to update the Connectivity Bridge on the nRF52 device on the Thingy:91 just to be on the same side. There is a pre compiled version in the pre compiled fw package, under the downloads tab on the Thingy:91 product page.

Thanks,
-Øyvind

[DevNetNow]

Hi

Yes i'm using NCS v1.5.1 

yes i have changed the connectivity bridge of the nrf52840 to send the logs on bluetooth for unplugged tests. 

regards