Example A:
It shows that the JSON is sent from Android and is received for NodeMCU
Example B and C:
It shows that the JSON can't be decoded
Example D:
Here It's sent a string and the example shows that the string is received
Example E:
This example shows that the string can't be converted to number
Example F:
This is shows the string is nil
I don't undestand what's wrong and I driving me mad. I have tried with Flask and Python and the same thing happens