+ PCB using STM32F103C8T6 and Max1487 (Max485 or equivalent) read V, A, Hz, PF, kW, kVA, kVAr,... from MFM383A selec Multifunction meter via Modbus RTU protocol.
+ Use uart to transmit readable data to pc for viewing.
thank for your interest in my project, if you want full schematic, PCB layout and sourcecode, please give me little donations for motivation, you can donate amount that you think reasonable, you can donate me via my paypal: thieplevn@gmail.com
Can you share the whole project? Thank you