The 1st prototype is mostly based on standard boards / modules, mixed together with 2 pre-drilled protoboard

What's inside : 

• NodeMCU (ESP8266) from Robodyn : https://robotdyn.com/wifi-nodem-esp8266-cp2102.html
• Adafruit 1.8 TFT LCD with MicroSD : https://www.adafruit.com/product/358
• A Step-up / step-down voltage regulator from polulu : https://www.pololu.com/product/2119 I love this stuff :-)
• A battery holder (3 x LR6)
• 3 push buttons + pull up resistors
• 1 white LED
• 1 groove connector for Serial connector
• 2 custom proto board (pre drilled proto PCB)

Node MCU is soldered (for space constraints). Everything else can be removed

The idea was to add everything from a breadboard to space-constrained boards. And to be able to build it with a crappy solder iron, bad quality protoboard, and spare pieces. Everything was done in few days 4 months ago

Here some pictures I have kept

The Node MCU is taking a lot of space : at this time I didn't knew about D1 Mini :-) :

I have tried to organize everything before soldering :

Once completed : Yes I know, it's ugly ...

Since then it's programming only. I work with Arduino IDE only, no micropython. Code is on github. Still in "prototype" mode ...