Thank you for your support on Makeblock.
Currently we don’t have exact list for that. All RJ25 electronic modules can be used in mBlock3 based on our boards: mcore, orion, auriga, megapi, etc. And in mBlock 5, almost RJ25 modules can be used based on mcore and auriga.
mBot-TT motor works in both mBlock 3 and 5:
Starter-25DC motor, if you connect it to auriga with dual motor driver, it can be used in mBlock 5;
Ultimate 2.0-encoder motor, if you connect it to auriga with encode motor driver, also works in mBlock 5;
Stepper motor also works in mBlock 5.
If you have more question, I’ll check and try to make a list next week.