The power supply must be able to provide sufficient current up to 2A. In “Vext position” and the BAT/REG jumper must be set to the right, in REG position. It through the external power input, the “Vin ext. If you choose to use an external power supply you must place The switch in the Raspberry connection bridge to the right. Jumper” to the right, in “Arduino 5V position” and do not forget to place If you decide not to use an external power supply you must set the “VinĮxt. We recommend to power externally the shield, but it's not necessary
These jumpers always have to be in this position, in gateway mode and jumpers in the SIM908 shield to the left, Place the Arduino/RPI jumper in the SIM908 shield to the right, With the module you can use several programs as cutecom in Raspbian graphicalĮnvironment or minicom in a terminal window in order to use it via SSH. Our Raspberry Pi directly to any serial module. Using gateway mode, commands can be sent from The first thing we are going to do with the module is to check the basicĪT commands in gateway mode. Using GPRS+GPS module with AT commands in Raspberry Pi Important type commands in capital letters and with CR (carriage return) and LF (line feed)!!! Now, with the module working you can check some AT commands to control the module, the basic commands are: Then if you type AT you'll get OK, this means that the communication with the module is working fine. Set the baudrate to 115200 bps and open the serial port, then press the ON button for two seconds. If you use the Arduino IDE serial monitor for sending AT commands – Be sure that you are sending CR (Carriage return) and LF (Line Feed).
Then connect the USB cable and the SIM card.įinally plug the USB cable to the computer and open a serial port terminal to communicate via the usb port (e.g: hyperterminal (win), cutecom / gtkterm (linux)). Remember take out the ATmega microcontroller from the Arduino gateway.Ĭonnect the shield to the Arduino gateway: In this case, serial communication jumpers have to be set on USB gateway position. The first thing we are going to do with the module is to connect the module to a PC directly (using an Arduino as gateway) and check the basic AT commands. Using GPRS+GPS module with AT commands in Arduino
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