... various accessories and software, specially designed for GSM/GPRS wireless systems being used for remote measurements, data logging, control ... / off-delays, pulse relay ,counters ,Watchdog function ,PI controller etc..Ø Logic functions-AND, OR, NOT, XOR……Ø Standard ... 4-lines, 16-character per line, backlight display& keypad optionalØ Standard Modbus RTU/ASCII/TCP communication protocol supported ...