I've solved this now. Here's the problem:
#define SERVO0_PIN 20 // Wondering if this is correct?
Funnily enough, it wasn't correct. Pin 20 is the Z MIN pin, as defined in pins_MELZI_CREALITY.h, and not the servo pin used by the BLTouch module.
At 8:04 of this youtube video, he says that that value should be set to 27, "if we'...
Maybe, just maybe, this post from how to add a physical button to extruder motor control? #10394 could help (the emphasis is mine):
rather than directly work on stepper.cpp, I would rather suggest to take a look at the LCD control part, and integrate an emulation of the prepare/move/Z-axis code. As for accessible pins, perhaps use any unused ...
By default, Windows does not come packaged with drivers for the CH340 USB Serial chipset the Creality Silent board has installed. To get your computer to properly recognize the printer, you will need to install the CH340 Driver software from WCH's website. (the company that manufactures the CH340 chip)
As of August 2021, the download for the drivers can be ...