Also fits the S2-SOLO.
Makes it easy to program modules before soldering them into whatever contraption you're building, or just to use as a temporary development board. You can always use this adapter to just put some wi-fi and OTA code onto the module and later reprogram through the network.
Based on the original by Solder Party.
As the S3 also has native USB support, there isn't a lot needed to program them. The added changes are a USB-C port, a voltage regulator, two switches for reset and boot mode and any required other components. Of course compatible with USB-C to C cables. This version also features an onboard LED for testing.
Shipping within a week or so. Lately shipments to the US have been taking up to several months so be aware of that.