Missing hardware prototype

[platisd]

As an INS-node I want become materialized so to stop being a figment of imagination and speculation.

DoD:

• Board layout and schematics designed in Eagle CAD
• Fritzing diagram added in README.md

[platisd]

@samup4web @lexious89 I was thinking about the optimum hardware setup for the beginning and concluded on a Wemos D1 Mini, instead of an ESP-01, Attiny25 (or 85) combo. This means that the total architecture will change a little bit as to where the main business logic is contained.

According to the old setup:

• ESP-01 was operated in AT-mode, meaning that we send commands to it via UART.
• Attiny parses the results and handles power management.

According to the new setup:

• We program the ESP8266 on the Wemos D1 Mini directly.
• Attiny handles power management.

Advantages :vs: disadvantages of the new approach:

• Easier and faster to develop/modify the main business logic since the Wemos can be programmed over USB with the Arduino IDE. :white_check_mark:
• For development we can practically use any other ESP8266 USB development module like the one @lexious89 has. :white_check_mark:
• Slightly more expensive. (ESP-01 costs ~1.6$ while Wemos D1 Mini costs ~2.6$) :x:
• Slightly larger. :x:
• Faster and more versatile setup since we do not rely on already made AT-commands to access the ESP8266 but we program it directly. :white_check_mark:
• Simpler and fewer hardware connections on the PCB from our side, meaning less risk. :white_check_mark:

Does it sound good? :smiley:

PS. Also thinking of a knowledge sharing workshop on PCB design where I can go over how to design the board if you are interested in it!

[samup4web]

Sounds like a good idea. I guess the cost impact is quite marginal, and for the size, as long as we can package it in something nice then I see no problem.

The PCB design knowledge sharing is a great idea!.

[platisd]

I have scratched out the creation of a Fritzing diagram as it will be redundant work at this point.