Barely Running Wi-Fi Station Mode on a Resource-Constrained MCU with Thingy:91 X

This post details the author's experience running Wi-Fi station mode on the resource-constrained Nordic Semiconductor nRF9151 MCU using the Thingy:91 X. The nRF9151's limited 256KB of RAM presented a significant challenge due to the Wi-Fi driver's resource demands. By disabling nrf_modem_lib and cleverly using overlay files and devicetree configuration, Wi-Fi connection was achieved, albeit at a whopping 99.11% RAM utilization. The post meticulously analyzes encountered issues, including driver resource consumption, patch loading methods, and socket creation, providing solutions and valuable insights for embedded developers.