Answers for "shapes (none, 1) and (none, 5) are incompatible"

ValueError: Shapes (None, 1) and (None, 3) are incompatible

y_train = to_categorical(y_train, 3)
y_test = to_categorical(y_test, 3)

shapes (none, 1) and (none, 5) are incompatible

Change Categorical Cross Entropy to Binary Cross Entropy since your output label is binary. Also Change Softmax to Sigmoid since Sigmoid is the proper activation function for binary data