I bought this because of the external antenna. When I started working with the device, I found that it couldn't detect a Wi-Fi hotspot to connect to and couldn't broadcast its own SSID. It blinks fine and shows in the serial terminal that it's looking for an access point that's across the room but never finds it and won't connect. Of course, the "window of return" has expired, maybe for a week. I can't use it if the radio in it is broken.
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