At the production site, the HM5 code reader successfully solved the LCD screen code reading problem in Factory A. It can easily read Data Matrix codes with a minimum size of 0.5*0.5mm with extremely high reading rate, which greatly improves the production efficiency of enterprises and reduces the workload of on-site operators. At the same time, the HM5 code reader is equipped with debugging software and real-time screen debugging, which facilitates installation and debugging. Its communication configuration is simple to operate, supports multiple protocols, facilitates communication with PLC, and requires simple writing and maintenance of PLC programs.