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Developing Wi-Fi applications

The nRF7002 DK combines the Wi-Fi 6 capabilities of the nRF7002 companion Integrated Circuit (IC) with the multi-protocol capabilities of the nRF5340 System on Chip (SoC), like Bluetooth LE, Bluetooth mesh, NFC, Matter, Thread, Zigbee, etc.

The nRF7002 is a low-power Wi-Fi 6 companion IC with integrated RF supporting dual-band 2.4 GHz and 5 GHz. It is designed with optimal coexistence with Bluetooth LE in mind.

The nRF7002 implements the Physical (PHY) and Medium Access Controller (MAC) layers of the Wi-Fi stack, while the higher layers of the networking stack can run on a host device. In the case of the nRF7002 DK, the host is the powerful dual-core nRF5340 SoC. The nRF5340 SoC also runs the nRF7002 driver and interfaces with the nRF7002 via QSPI as shown in the figure below:

The nRF Connect SDK which is based on the Zephyr RTOS offers a rich set of options for a Wi-Fi application.

For instance, you can use TCP or UDP sockets, or you can add additional overhead but also get the benefits by using application protocols like Constrained Application Protocol (CoAP), Lightweight M2M (LWM2M),  MQTT, or Hypertext Transfer Protocol Secure (HTTPS) as shown in the diagram above. In this blog post, we will be using MQTT which uses TCP/IP internally.

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