AT Commands Supports AT commands Requires separate controller to send AT commands over RS232 port. Python Script Allows the user to write their own Python script which can add intelligence to the modem. When Python script is running the AT parser is taken over by the script, this means that if you still wish to use AT commands in conjunction with Python script you will have to write the script to accept and transfer the AT commands to the Parser. Example 1. Upon receiving data on the RS232 port connect to the network, send data, await response, disconnect from network. Example 2. Receive data from vending machine, ‘Sold 1 mars bar’, update a mars bar counter every time one sells. At 17:00 send a message with how many mars bars have sold. The Python version is a cut down version created specifically for Telit modules, documentation is available from Gateway. Link Connect modems create a permanent link between the connected device and the users server. A setup manager allows you to create a configuration file which contains attributes such as: IP address, Port number, timeouts, data packet size. Once the setup has been complete the Link Connect modem will initialise the connection and maintain a connection. It will then act like a pipe and send any data presented on the RS232 port and also listen for incoming messages from the server. You cannot run Python scripts on this modem. You can use AT commands, however the Quik Connect modems are better suited for AT command use. The Link Connect seamlessly maintains the cellular connection and will automatically reconnect upon connection being lost. It means that the user doesn’t need to worry about writing any code and can use this modem to easily send data wirelessly.

ZEST ZETA Entry level modem, no GPIO (general purpose input output). Will run both AT commands and Python script (Quik Connect). The industry standard. GPIO’s, USB and RS232 serial ports. Wide supply voltage. Will run both AT commands and Python script (Quik Connect). Entry Level RS232 serial port USB serial port Supply voltage capability 6-18V Wall or DIN rail mountable AT command driven Python Script RS232 serial port USB serial port 5 GPIO lines Supply voltage capability 5-42V AT command driven Python Script

ZOOM ZULU The embedded solution. Where customers already have a PCB and need to add wireless communication. Wide supply Voltage. Will run both AT commands and Python script (Quik Connect). All singing all dancing. This modem has a wealth of features. The main feature is the on-board M4 ARM processor which allows the user to program this modem to become intelligent and can process and convert analogue and digital signals as well as communicate over various industry standard protocols. TTL serial port RS232 serial port USB serial port 10 GPIO lines Supply voltage capability 5-42V AT command driven Python Script EVK development board available USB & RS232 serial port 10 GPIO lines ADC, DAC, CAN, 1-wire & I2C interfaces 36 way multi interface connector DIN rail mountable Optional Battery ARM Cortex M4 32bit processor EVK development board available