Modem Application Notes

Introduction This application note shows how to send an AT command directly to a Siretta Modem using a Mobile phone or SMS relay service. The text messages (SMS) containing AT…

Circuit switched networks physically connect two endpoints together using a communication channel through the network. This utilises a fixed bandwidth for the session whilst the two endpoints remain connected. Packet…

IP Sockets Overview To connect embedded systems together using the internet requires the use of data sockets to send information from one location to another. This process has been around…

CSD Overview Many applications in use today utilize the circuit switched dialing (CSD) service available on older style modems and communication devices. The CSD service allows a device to dial…

The latest Siretta ZETA family of modems have been designed to operate with a very low power consumption. The ZETA-NLP has also been optimized to operate in an ultra low…

This Application Note is designed for customers who are looking to test their GPS antenna performance using a Siretta GNSS Modem. Requirements Siretta GNSS Modem such as the ZETA-G-UMTS or…

GPRS Connection //Set extended error messages AT+CMEE=2 //Set GPRS APN Name AT+CGDCONT=1,”IP”,”APN Name” Outgoing Connection //Set packet size and timeouts on context 1-6 AT#SCFG=1,1,300,90,600,50 //Open GPRS context 1-6 with GPRS…

Python Debug Application Module Configuration //Connect via HyperTerminal or similar to the COM port //Set extended error messages AT+CMEE=2 //Set trace port to local AT#SSCTRACE=0 //Set CMUX to 115200 baud…

GPRS Connection Parameters //Set extended error messages AT+CMEE=2 //Set GPRS APN Name AT+CGDCONT=1,”IP”,”APN Name” //Set GPRS Username AT#USERID=”username” //Set GPRS Password AT#PASSW=”password” Outgoing Connection (Old Commands) //Open GPRS context 1…