Module

_{My Yatchy, with a titanium anodized case, the rotated variant}

_{The battery is on the side because it's easier for me to measure power consumption, there are cases with the battery inside}

_{A clean soldering job, with some alternative components (compability!), yes, I know there is a short on the flex cable, it fell off when cleaning after the picture}

Watchy one the left yatchy on the right, yatchy is smaller (yes, the battery is outside, but it would only increase height, not width/length

_{Picture contributed, thanks!}

• Detailed ordering and assembly guide
• Detailed soldering and testing guide
• A module area, with almost all exposed pins from the esp, power lines, and many gpio pins thanks to the expander IC - You can create your own module, increase the capability of you yatchy without modifying everything inside - solar panel module, encoder instead of the button, sd card module, frontlight module, torchlight module, speaker module, microphone module, some environmental sensors. The only limitation is your imagination (And the size of the module)
  • The default module (In the picture above) allows for for attaching small things without the need for a custom PCB
• All the components are newer, still available and produced. They are also listed, with links to mauser / tme. Ordering a Yatchy PCB and the parts, soldering them themself is possible and easier than the watchy
• All QFN packages IC's on the board have increased pad sizes, so if you are skilled enough to solder QFN packages, here it will be easier
• I used traces teardrops, so more solid traces & pads
• A hardware test program, which allows testing if all the pads of the esp32c6, which is the hardest part to solder are soldered correctly
• JTAG debugging via usb, yay

• No battery connector, the module pads are small - so it's not for everyone, harder to use / assembly (solder!) for beginners
• There is no dedicated place for the motor, it needs a dedicated place in the case. Soldering the motor cables also is not easy
• It's watchy like but not watchy case compatible, the size and form factor is the same but the obvious obstacle is USBC, even with it the buttons are different and placed a little off to save some space
• It's a 4 layer PCB, so a bit more costly (With JLCPCB it's still cheap)
• No easy hard reset option, you will need to short pins, but you probably won't need it. _{When developing the Yatchy, I only once needed a full reset}
• A complicated license (but still open source!)