Ok so i found the CAD model for the LiPo battery and did the full routing on Aries.
Placed the SCD40 sensor at the top Left, near but not too close to the OLED, didn’t want the microcontroller heat messing with sensor readings.
Used ground fill, routed everything, then added a Red Five from Star Wars silk screen image (i mean why not : ) ).
Added mounting holes so I can screw it onto the enclosure.

For assembly, I’m soldering headers onto the XIAO ESP32-C3, then soldering those onto the board. Same approach for the circular TFT display. The SCD40 air quality sensor is coming as a hybrid PCBA from JLC PCBA, along with the resistors.

I kinda mixed up my communication protocols on the schematic. I was feeding both SPI (for the display) and I2C (for the sensor) into the same pins. The sensor uses I2C with serial clock and serial data, and the display uses SPI with serial clock and serial data (but the data line is MOSI, master out slave in). I literally joined I2C signals with SPI signals, which obviously doesn’t work.
Caught it while routing and checked online to confirm, then i renamed the SPI clock line to SCLK and the MOSI line to match the display pinout, so em yh, i think that is it for now on aries, chao :)

Oh i totally forgot, i am adding a slit under the Xiao to pass my LiPo power lines to Bat + and - to solder.