... 3G modem M2M GPRS Modem With RS232 RS485 for Meter Reading Temperature and Humidity Monitoring (F2103I)Designed with industrial grade, with TCP/IP stack, supports transparent ... used for data communication/acquisition, remote control and minotring, M2M appliation, etc. Detailed information A. Wireless Specification1. EGSM900/GSM18002. GPRS multi-slot ...