That's one of the problems with this forum - there are simply too many topics. I often wonder how much of the moderators' time is spent just moving posts to the correct topic.
AT = Antique Technology.
When I see ESP and AT commands in the same post, I am reminded of Marvin's prophetic words: "This will all end up in tears. I just know it."
Why are you using an ESP board to provide WiFi connection to an Arduino when there are ESP boards that can already do the tasks of most Arduino boards? I am thinking NodeMCU or WemosD1 Mini.
Oh, on the schematics:
- You are deigning a PCB and don't have a schematic for it?
- Your schematic cobbled together from various sources is miles ahead of a Fritzing picture, but we generally don't have chip pinouts in our long-term memory. Label the pins.
- See #1. Really?