Since my window blind is 2m long (6ft), 1 motor couldn't provide enough power to get the blind back up.

So I designed a 2 motor holder and now the blinds can go up wihout skipping steps.

I supplied 9v to the motor controllers so there is a higher torque.

All other credits go to the orignal maker: https://www.thingiverse.com/thing:2392856

When uploading his code now, it won't work due to Json buffer issues.

Please do the following to make it work:

With the Arduino IDE, the version that is selected with the Board Manager (Menu Tools > Board > Board Manager: search for ESP) then the esp8266 by ESP8266 Community will be displayed and there you can select version and choose 2.4.2.