After lots of tests and contributions from many of you, we finally have a functional Arduino code / blocks and prototype for Otto using ESP8266 and coming soon with the help of @Nicolas ESP32
Just collecting all initiatives here in one place and how you can get started into the world of IoT with Otto Blockly, oh and the plus of no memory limitation issues as with nano.
Using ESP8266 or WeMos
@Bill SCHONFELDER you are gonna like this board + shield combo i found on amazon
+Shield Module for NodeMCU ESP-12E ESP8266 it comes with L293D + DC Motor Driver!
I am pretty sure many of you saw them but here i made a 3D design for the head compatible with Otto (.stl file attached) so you only need to 3d print this new head to give a try
And we also have plenty example codes in the new Otto Blockly 1.4.2 just make sure to select "Otto IoT" instead of Arduino nano
This is a simple example with IFTTT endless possibilities, we are adjusting the blocks more intuitive but so far they are quite complex by nature but ideas are welcome.
Have you tried Python on these @Piers Kennedy ?
Using ESP32 similar to Ottoky
For ESP32 we need to find a similar shield here there is a post about it
and we will be updating as it progress like this OLED update