This shield can be used with or without HydraBus board, you can even cut HydraBus specific right side (on the line) to have a tiny ESP-WROOM-32 breakout board.

Available at OSHPark https://oshpark.com/shared_projects/6t5hURXL

https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/b91aaec4e1a92d58734aeff21bf9fc87.png

https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/9d80c2a6c41cb3134adda8e08cc9f85c.png