The weather station kit and other Wi-Fi-based projects use the ESP8266 system on a chip. This chip supports 2.4GHz Wi-Fi but not 5GHz. If your Wi-Fi works on both bands you probably have two SSIDs. The 5GHz band SSID often ends in 5G like this – “BlackCat-5G”. When you set up the config.h file for the D1M-WX1 weather station make sure you choose the SSID for the 2.4GHz band.
Use 2.4GHz Wi-Fi for weather station
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