GPS/LTE_M/NB-IoT nRF91

[Hoang]

Dear, 

I am using :

ncs: v0.4.0 

SES 4.16 

firmware: mfwnrf916007029alpha

Hardware: nRF9160 DK v: 0.8.5

I want to do: 

1. Enable and get GPS position ("AT\%XSYSTEMMODE=0,0,1,0") and data from BMP280 sensor  --> store it in data_pack

2. Turnoff GPS and Enable LTE_M: ("AT\%XSYSTEMMODE=1,0,0,0") & use HTTP POST to post data_pack to my webserver 

3. Switch to NB-IoT: ("AT\%XSYSTEMMODE=0,1,0,0") & use HTTP POST to post data_pack to my webserver

Is it posiblie to do like that now?

I know: "The current modem firmware, v0.7.0-29-alpha, allows you to choose the system mode via command %XSYSTEMMODE, but it does not support them concurrently, meaning that you cannot have GPS + NB-IoT, or GPS + CAT M1, enabled simultaneously at this time." Håkon Alseth https://devzone.nordicsemi.com/f/nordic-q-a/48077/gps-http-post

I can switch: AT\%XSYSTEMMODE=0,0,1,0/AT\%XSYSTEMMODE=1,0,0,0/AT\%XSYSTEMMODE=0,1,0,0 but I couldn't POST data to my webserver.

Do you have any suggestions?

Thanks,

Regards, 

hng

[Håkon Alseth]

Hi hng,

 

I am very sorry for not seeing the last post in the linked case.

The system has a flaw when you accept an answer, then add a new reply, it will still mark the case as resolved, so I do not get a notification or state-change on that topic, unfortunately.

 

From the last reply, it seems that you are not able to successfully connect over NB-IoT in your area, as you do not get the Cell ID, MCC, MNC, and other registration information. You could try to ask your local network providers if there's a nb-iot coverage issue in your area.

Cat M1 still works fine, right?

 

Kind regards,

Håkon

[Hoang]

Dear Håkon Alseth

Thats ok Håkon. 

I verified the NB-IoT in Horten, Vestfold with iBasis: NO. Then, I used another sim card (telia), I got NB-IoT signal but no LTE-M. I will find someone else, can supply both LTE-M and NB-IoT. 

But, what do you think about my plan: 

I want to do: 

1. Enable and get GPS position ("AT\%XSYSTEMMODE=0,0,1,0") and data from BMP280 sensor  --> store it in data_pack

2. Turnoff GPS and Enable LTE_M: ("AT\%XSYSTEMMODE=1,0,0,0") & use HTTP POST to post data_pack to my webserver 

3. Switch to NB-IoT: ("AT\%XSYSTEMMODE=0,1,0,0") & use HTTP POST to post data_pack to my webserver

Is it possible to do like that now?

Regards,

hng

[Hoang]

Dear Håkon Alseth, 

Thanks so much, 

I hope you can fix it in the next fw version. 

Regards

hng

[Håkon Alseth]

It is our intention to fix this soon.

Sorry for the inconvenience.

 

Kind regards,

Håkon

[Hoang]

Hi Håkon Alseth, 

With the new ncs version 1.0.0, and FW1.0.0 and HW nRF91 DK 0.8.5, can we run the loop ( GPS_TLE_HTTP Post) now? Håkon Alseth. 

With asset_tracker/gps_controller, how did you control gps and lte? 

I am trying with a new ticket, but it takes so long time for me to find out the solution. 

https://devzone.nordicsemi.com/f/nordic-q-a/50566/gps-and-http-post-ncs_v1-0-0 

I hope you can help. thanks so much 

Regards, 

Hng

[fabocode]

Hi 

I'm trying to get the same solution (read GPS data and send it to my webserver) but I don't know if you finally found a way to do it. I'm using a Thingy:91 for this 

[Hoang]

hi fabocode

Ja, I could do it now.

But, this ticket was created with old FW, when PSM was not enabled yet. 

With the new FW, we can use PSM mode - LTE-M/NB_iot & GPS could work together  

  

#if defined(CONFIG_LTE_NETWORK_MODE_NBIOT)
/* Set network mode to Narrowband-IoT */
static const char network_mode[] = "AT%XSYSTEMMODE=0,1,1,0";
#elif defined(CONFIG_LTE_NETWORK_MODE_LTE_M)
/* Set network mode to LTE-M */
static const char network_mode[] = "AT%XSYSTEMMODE=1,0,1,0";
#endif

I used PSM mode, and asset_tracker example - removed the nrfcloud/mqtt ... 

1. enable PSM mode 

2. search the satellite to find the position

3. send the position to my webserver by http post  - you can check https://devzone.nordicsemi.com/f/nordic-q-a/46086/nrf9160-dk-http-post-to-my-webserver/182163#182163

hope it can help. 

Sorry, I couldn't share my code for you. 

BR, 

Hoang Nguyen