I’ve picked up one of these 4X 30A Relay boards, with Wifi-BlueTooth.
ESP32-WROOM-32E
They mention the GPIOs I can program, and mention it’s programable… but it’s Disapointing to see it does not have a USB connection.
Am I going to be able to get ESPHome on this?
Yes, but you need usb to uart converter.
And you might have to get your soldering iron fired up:
For UART, I believe I use these pins:
short IO0 to GND, and I can use this UART converter:
Correct? I will try to tonight.
Yup, that’s what the instructions say 
BTW:
Don’t forget that you need to ‘cross-connect’ the RX and TX pins, i.e. TX on the board goes to RX on the converter and vice versa.
Don’t rush.
You need to power the relay board with it’s own supply.
You don’t connect the 5V pin on header to the converter.
You set the jumper on converter to 3.3V.
