> Node MCU --> 400INR > ATMEGA 328P Microcontroller --> 100INR > Misc Electronic components ( crystals, capacitors, resistors, LED etc) --> 100INR > Copper Clad Boards --> 100INR > 6 Amp wall panel mount switches --> 40INR > Backelite sheet --> 25INR > A normal remote control --> 50INR > OLED Screen --> 300INR > LM 35 Temp sensor --> 35INR > RTC Module --> 200INR > Screw Terminals --> 100INR > 5V Relays --> 200INR > Darlington transistors --> 20INR > Power supply 230vac/5V --> 280INR Total is about 2100 INR which is =~ 32 USD