Device always offline (initial setup)

[jtebert]

I am trying to set this up on a Wemos D1 mini clone and can't get the device to show online in ESPHome. I don't have it connected to my heat pump yet, just running the board its own.

• I am able to compile and flash to the device through ESPHome in Home Assistant, with no errors (by having it connected by USB to my laptop)
• Sometimes I can see the device show up in my router's client list (unifi), but it shows the "Wifi experience" as "No experience", despite showing a good connection. Then the device will just disappear.
• In the Arduino IDE, I tried installing and running the ESP8266 web server example, and I was able to see that page successfully and reliably, so I don't think that I have an issue with the board itself
• I tried plugging the device into a different power supply, with no change.

Here is my YAML configuration:
hp-test-example-yaml.txt

Any suggestions on what might be going on, or how to debug this further? Not being able to have serial logs makes this trickier.