... GPRS modem 3G modem M2M GPRS Modem With RS232 RS485 for Meter Reading Temperature and Humidity Monitoring (F2103I)Designed with ... data communication in real-time, etc. It has been used for data communication/acquisition, remote control and minotring, M2M appliation, ... 1. MCU High-powered MCU, 100M 2.Interface RS232/RS485 serial port, rates: 110~230400bits/s Indicator lights: "Power", "ACT", "Online" ...