Finished Routing My PCB:
Process:
STEP 1. Check all schematics
STEP 2. Use auto routing function, define the thickness or trace for each type of trace: eg. 11.1V-1.25mm, logic-0.254mm, 5V-0.9mm……etc.
STEP 3. Skip the routing for GND nets
STEP 4. Adjust any wiring
STEP 5. Pour Copper layer for the grounds
—————————————————–The process sounds easy, atleast that’s what I though at first, but here are some things that I learned and challenges encounter in the process:

1. Schematics is the easy part, do it well and it could you could save alot of time in the routing section.
2. When letting the software to handle auto-routing, make sure to leave out the GND nets so make the wiring less complex.
3. Route the GND nets at last with copper filled layer to ensure all grounds and securely connected.
4. Issue encounted->Isolated island
   As posted in the image, even after pouring in the GND layer , there still is a ratline between the ground port of C7 to other components, meaning the ground of the part is not connected. This is a common issue for auto routing other nets first , ignoring ground and make it an isolated island.

Solution:
To fix the problem, I swap the position of C7 and U8 so that the C7 will not be caught in the connectionof U8 to my ESP which is the main reason why C7 is electronically isolated.
After that, we can simply regenerate the ground copper layer to fix the issue.

1. Issue encounted-> Antenna Clearout:
   Since my project will rely heavily on RC control, I need to clearout the copper ground below the antenna part of my esp as the double copper layer could potentially block radio signal.

That’s it for now, the design final reaches “DRC(0)” and now I am adding silktouch design to the bottom layer for the final touch before sending the file for production!!!!!
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See yall later.