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GSM3 click carries the SIM800H, which is a quad-band (850/900/1800/1900MHz) GSM/GPRS module that transmits voice, sms and data information. Utilizing the module's full potential, GSM3 click also has an audio input/output connection pad (for a microphone and earphones, which can also be used as an FM antenna). The SIM800H also supports Bluetooth, so a 2.4 GHz active antenna is also included on the board. Two indication LEDs signal the operating and network status of the module. The board uses a 5V power supply, but can communicate at either 3.3V or 5V voltage levels (selection by SMD jumper). An LED diode indicates the presence of power supply. |
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