Engineering Mode: *#110*01# factory Mode: *#987# Restore Factory Settings: *#987*99# Check Software Version: *#900# OR *#800# Default User Codes: 1122, 3344, 1234, 5678 Change LCD Contrast: *#369# To Enable COM Port: *#110*01# -> Device -> Set UART -> PS Config -> UART1/115200 Codes to Change Screen Language: * *#0000# + Send : Set Default Language * *#0007# + Send : Set Language to Russian * *#0033# + Send : Set Language to French * *#0034# + Send : Set Language to Spanish * *#0039# + Send : Set Language to Italian * *#0044# + Send : Set Language to English * *#0049# + Send : Set Language to German * *#0066# + Send : Set Language to Thai * *#0084# + Send : Set Language to Vietnamese * *#0966# + Send : Set Language to Arabic