NRF9160 and NRF7002 for LTE, GNSS and WiFi Asset-Tracking

[Lukas1801]

Hello,

I am designing a LTE-M GNSS Tracker, that should also be able to scan for WIFI APs. I dont need to use LTE and WIFI at the same time, but rather like that:

1. Connect to LTE, download AGPS Data. 
2. Go into LTE PSM mode.
3. Start GNSS and aquire Fix
4. Deactivate GNSS
5. Activate WiFi with nrf7002 and scan for APs
6. Deactivate Wifi
7. Come back from PSM Mode and send the GNSS Data + WIFI APs over LTE to my CoAP Endpoint.

For that, I am designing a board using the NRF9160, together with the NRF7002 WIFI IC. I took the pinout from the NRF9160DK and NRF7002EK Shield. I have two questions:

1. Is there anything important to notice for the pinout, when connecting them both? Especially, to allow really low power. I need to be able to "deactivate" nrf7002, when not in use. Here is a snippet from my schematic. This should match the NRF9160dk with NRF7002 Shields connections.
2. 
3. Is it possible, to have WIFI Scanning and LTE activated in the project? I see, that the example AssetTracker v2 overlay file tells only WIFI scanning. I am not planning to use them simultaneously , but rather sequentially.

Any help from experience or from the dev team is highly appreciated. Cheers

[mathiaso]

Hi again, Lukas.

Is there anything important to notice for the pinout, when connecting them both? Especially, to allow really low power. I need to be able to "deactivate" nrf7002, when not in use. Here is a snippet from my schematic. This should match the NRF9160dk with NRF7002 Shields connections.

The Host connection section of the PS shows the necessary connections between the nRF7002 and a host MCU (in this case nRF9160).

Regarding deactivating the nRF7002, the Supply sequencing requirements describe the sequence of powering up and down, while the Supply system alternatives describe how to dynamically power up and down from a host.

Beware that the nRF9160 only supports SPI, not QSPI.

Is it possible, to have WIFI Scanning and LTE activated in the project? I see, that the example AssetTracker v2 overlay file tells only WIFI scanning. I am not planning to use them simultaneously , but rather sequentially.

The nRF Cloud multi-service sample might be something for you to look at.

Best regards,
Mathias