... data from apparatus (thermometer, humidity meter, electric meter, flowmeter, PLC) to user or monitoring center by GPRS. The King Pigeon ... , transmit and receive analog, digital and pulse counter data, PLC, Varity metering equipments to any device connected to the Wireless ... ;16. Unmanned machine rooms;17. Control room application; 18. PLC and Automation System, M2M;19. GSM Access Control System, GSM ...