... , CSD, GPRS, UDP and TCP/IP protocols Supports Modbus RTU protocols GPRS Terminal IP Address The King Pigeon S2XX Serial GSM ... , 12 bit resolution), RS485 Port(Support Modbus RTU Protocol, more protocols can be added according to application requirements), reserved RS232 Serial ... activated alarm.A Data Logger. The unit can save the all of the acquisition data in internal memory storage and upload ...