The software is typically provided by the seller, but you can find similar Modbus-RTU testing software online.
The official software is usually supplied by vendor links upon purchase (such as AliExpress or Amazon sellers) or hosted on repository archives. A widely maintained copy of the original PZEM-017 Chinese/English Software and Manual can be sourced through community distributors. pzem-017 software download
– https://pan.baidu.com/s/1V9bDWj3RK2u6_fbBJ3GtqQ Password: rq37 (Often included with units purchased from Chinese distributors) The software is typically provided by the seller,