Interesting issue with my wifi Car project Hello so i build a nodemcu wifi controlled car, everything works fine expect i have one small issue, currently i have 2 9v batterys, one of them is connected to motor controller and other one is connected to nodemcu.. but the nodemcu's 9v battery gets hot in a minute and stops working. What am i doing wrong? + is connected to vcc and - is connected to grnd on nodemcu.
the nodemcu's 9v battery gets hot in a minute and stops working. What am i doing wrong?


You're using a 9V battery.

Those batteries are useless. They have very little capacity, and can provide very little current. The NodeMCU needs a lot of current. 

Choose a better battery. Maybe a Li-Poly battery would be good (mobile phone batteries are good for this).