With all the BigTreeTech mainboards only the Octopus and the SKR 2 have that header. All others have the 8 pin header that only supports ESP-01S. You can see the tiny sorry little guy on my SKR Pro here..



It absolutely sucks. I am hoping it will do better with the powerful mainboard driving it but I am keeping my hopes low. Now the ESP-12S I have big expectations of. I have 2 printers with ESP-01S and 2 printers with ESP-12S. This should make for a real good comparison. The ESP-12S module is notably larger and connects with many more pins..



What wifi do you have for that board? ESP-07S or ESP-12S?