SIM800C GSM GPRS Module

<p>DESCRIPTION</p> <p>Power input: DC5V or received by a lithium battery input VBAT and GND.Supports MCU level: 5V / 3.3V for TTL logic (Such as the common 51 and the for af 's the 3.3v) Antenna use: IPEX antenna interfz rsion PCB antenna or antenna IPEX-SMA-</p> <h3>PIN DESCRIPTION</h3> <p>5V: power supply pin, the only inj 3 r the board</p> <p>V_TTL: access control board microcontrolls re target voltage of 5V / 3.3V (according to<br />its own microcontroller is I ) gt i d to convert the GSM<br />module board TXD and R_XD fo!e wrresponaTL IognEND power supply<br />ground We Are The Distributor @§TZT Brat Hong Kong€hina.</p> <p>TXD: send pin serial port modul@* TTL ley ly corected to RS232 level)<br />RXD: receive pin serial port module, TTL level (not directly connected to RS232 level)<br />DTR: Data Terminal Ready</p> <p>SPKP: Core Audio output pin</p> <p>SPKN: Core Audio output pin</p> <p>MICN: Core Audio input</p> <p>MICP: Core Audio input</p> <p>RI: Ring core pin tips</p> <p>VRTC: RTC pin external battery</p> <p>GND: power supply ground</p> <p>PWR: This pin can turn down or turn off the module</p> <p>GND: power supply ground</p> <p>VBAT: lithium battery input pin, 3.3v; – </p>