There is a Wifi Manager with custom parameters. After first power on or if you hold Button1 during boot, a new wifi AP with name esp-xxxxxx appears and LED starts blinking. String after esp- in the ...

It's why DIY smart home projects suddenly got cheap (and actually doable) ...

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Abstract: Affordability, Long-term warranty, scalability, as well as continuous decline in the LCOE (levelized cost of electricity) of PV (Photovoltaic) in many nations, are largely responsible for ...