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Just barely fitting a full Wi-Fi stack on the nRF9151


In my last post on the Nordic Semiconductor Thingy:91 X IoT prototyping platform, I outlined the features and architecture of the device. The combination of wireless protocols on the Thingy:91 X (Bluetooth LE, LTE-M, Wi-Fi) make it a compelling foundation for a wide variety of applications. However, there are a few intricacies to the protocol support. Namely, the primary stated purpose of the Wi-Fi support is for network-based positioning (i.e. scan for local access points, send them to a server, get approximate location back).

Namely, the primary stated purpose of the Wi-Fi support is for network-based positioning(i.e. scan for local access points, send them to a server, get approximate location back). This serves to enable the nRF7002 and its dedicated power management IC (PMIC) ( nPM6001), as well as the short range (Bluetooth, Wi-Fi) capabilities of the RF front end. There is still more to explore to determine the capabilities and limitations of using a resource constrained MCU host with nRF70 series devices, but knowing that it is possible opens up the door for some interesting multi-protocol designs.

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