We made an open source ESP8266 dev board for makers
Cool - it looks like a well-designed board, although the timing is a bit unfortunate with the ESP32-S2 emerging as an ESP8266 replacement with USB.<p>A few questions:<p>* Should the relay have some sort of isolation, like an optocoupler?<p>* Is it FCC-certified?<p>* Like other people asked, any information on how the antenna was designed?<p>I like the old-school dome LEDs. And it's cool to see another project with a CH340 USB/USART bridge, even if they wouldn't need it with an ESP32-S2.