The WiFi function did not work on the product I received, but following the seller's instructions and re-soldering fixed it. Caution. The WiFi SoftAP function of this product is a simple one. There is no security as the SSID and password cannot be changed. It is probably intended to be used only when the user does the initial setup. This product has a serial port, but since I don't know the root password, I can't log in. The chip used in this product seems to be Hi3516EV200.
Perfect transaction in every sense. A replacement for a previous DOA which was accepted for refund