Struggling to get connected to BM2 battery monitor

[Maxxell]

Hello! Can someone help me get voltage data into Home Assistant through ESPHome? I tried OpenMQTTGateway but only got battery as a percentage. So I grabbed another ESP32 and flashed in ESPHome, following these instructions: https://github.com/syssi/esphome-jbd-bms/blob/main/docs/beginners-guide.md

I got the new device set up. Its on my wifi and its reporting to MQTT. (I couldnt get the API connection to work)
But now my logs consistently say: Not Connected.

OpenMQTTGateway was able to connect to the BM2 battery monitor from the same location.

I am worried that I need to change the yaml under the ESP32: section, but so far have left it as board: wemos_d1_mini32 since I'm pretty sure my ESP32 is a D1mini clone type thing. But maybe I'm wrong and hopefully someone can guide me to the correct answer. Here's the ESP32 I am using (Amazon Link): https://a.co/d/5xF4NGl