Lego Spike or Robot-Inventor connected to esp8266 controlling 8 power functions motors with infrared.

Python code for lego c code for esp8266 You will also need this library https://github.com/jurriaan/Arduino-PowerFunctions

3D Print connector for Spike and inovator

DIY connector for Lego spike and inventor

Step 1:Print plug

Thingverse link

Step 2: Use 0.6 mm single wire and push them through the holes.

Step 3: hot glue wires from the  back, so they stay in place

Step 4: you can add some instant glue below wires if you wish, but that's not 100% necessary.

Step 5: Then cut wires. In real plug ground should be longer than others.

See more info about connector at HERE

Thermal printer to Lego Spike and inventor

I'm starting posts again after few year break. This post is about connecting thermal printer to new lego mindstorms series.

First of all i printed my own connector

I will make another post about connector
Printer has i't own 9 volt battery, because i don't know if lego can provide enough current for printer.
Then i connected ground and data lines to printers serial port.
Code is simple in python

Printer i used was this Link to Aliexpress