nRF52840 + nRF7002 for BLE Scanning and MQTT Connection

[kcl]

Hello,

I'm working on a project that requires both BLE and MQTT connection capabilities.

I considered using the nRF52840 with the nRF7002 for this purpose. However, I came across a forum post (https://devzone.nordicsemi.com/f/nordic-q-a/109785/nrf9160-with-nrf7002-ek-connect-to-wi-fi-network) that stated the nRF9160 + nRF7002 combination is limited to Wi-Fi scanning only due to memory constraints.

Given this information, is BLE scanning only and MQTT connection possible using the nRF52840 + nRF7002 combination?

[Joakim Jakobsen]

Hi.

As you can see in the host device considerations page;

The nRF52840 is marked as supported, but with a commend that "the SoC is supported, but the use case is not recommended due to performance or memory constraints."

I don't know much about your application or memory requirements, but you could consult the Wi-Fi "scan-only" meemory footpirint requirements here:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/protocols/wifi/scan_mode/mem_requirements_scan.html

The scan-only Wi-Fi driver is very lightweight and can work on the nRF52840. In principle it could work on the nRF52832/833 as well, but I don't know if I would recommend that.

Br,
Joakim

[kcl]

Thank you for your clarification.

Given the time constraints and requirements of my project, I would consider upgrading to nRF5340 or other Wi-Fi module with dedicated flash and RAM.