@vikasrij - I had the same problem, but found that after I got all the settings correct, I needed to power cycle the dimmer, after doing that, they have worked flawlessly (I have 4 of them). Below are my notes, some of them are menu selections, others are commands you send on it's command line. Good luck!
Module Type 54
reset 5
TuyaMCU 21,2
TuyaMCU 11,1
DimmerRange 10,1000
rx_pin: GPIO3
tx_pin: GPIO1
