FARGO electronic 1800, 900 18

4.It could be in some case (e.g. network failure) the modem cannot return response SMS. The modem will try sending response SMS for three times max. If still not successful it will abort.

5.Always think twice before you send AT command by SMS. For example if you send AT+CPOF it will turn off the modem, and you need to go to access the modem to reset it.

Confidential, the whole present document is the sole property of Fargo Telecom (Asia) Ltd.

Contents

GSM GPRS Modem 900 Value Added Feature USER MANUAL Revision history Rev Date Details Originated by Table of contents 1. INTRODUCTION 2. INSTALLATION 2.1 Identifying your Fargo Maestro 2.2 Installing the Value added feature Page 3. AUTO TCP/UDP CONNECTION (Fargo Maestro 100 only) 3.1 Flow diagram of Auto TCP/UDP function 3.2 AT commands for Auto TCP/UDP AT+AUTOTCP=0 3.2.2AT+IPTCP <port port <address address <TCPTxDelay 3.2.3AT+AUTOTCP AT+IPUDP <cid AT+AUTOUDP=0 3.2.4AT+IPUDP <UDPTxDelay 3.2.5AT+IPGPRS Defined Values : <Cid <APN <UN 3.2.6AT+IPBUFF Example: AT+IPBUFF=5 18 bytes of data sent from TCP or UDP socket to modem 15 bytes (multiple of 5)data sent out to serial port, remaining data buffered inside the modem <buff 4.REMOTE AT COMMAND BY SMS 4.1 Description of the Operation 4.2 AT command for configuring AT command by SMS 4.3 Limitation and caution to be taken when using remote AT command Page 5. I/O TRIGGERED AT COMMAND 5.1 Description of the operation 5.2AT command for configuring I/O triggered AT command 5.3 Notes and cautions to be taken when using I/O triggered AT command 6. KNOWN ISSUES 6.1 AT+WIND command 6.2 Saving of parameters to non-volatilememory 7. QUESTIONS AND ANSWERS 7.1 Installation 7.2 AutoTCP/UDP 7.3 AT command by SMS 7.4 I/O triggered AT command