SIM900A Wireless Extension Module Board Antenna mini GPRS GSM Module

features of this product:

1. SIMCOM industrial-level module: SIM900A.

2.1000UF high-quality tantalum capacitors, powerful filter power.

3. TVS anti-surge anti-interference circuit is suitable for industrial situations.

4. Curved wiring + high-performance antenna, the signal is very strong.

5. Gold-plated connection (IPX) with good contact performance.

6. Welding process of industrial-grade patch, stable welding spot.

7. Anti-static and shock-proof bubble bag packaging, transportation safety.

The eight functions are widely used:

1. Voice call function — telephone alarm.

2. Receiving – sending SMS messages – SMS controller, SMS alarm.

3. GPRS function – communicate with the server and send and receive data through traffic.

4. MMS function – MMS send pictures, security, and only home suitable for use.

5. DTMF function – resolve the key value of each other in the call and remote control of the phone.

6.TTS function – speech synthesis {need to contact us

7.LBS function – base station positioning.

8. Bluetooth 3.0 function.

Pin description:

PWK– remove the short circuit point and drop down the switch.

DTR – DTR pin

RI – RING pin

RST— module reset.

TXD— connect to the RXD of MCU.

RXD— connect to the TXD of MCU.

GND – GND function

+5V– standard 5V power supply.

VBTA— connect lithium battery.

GND – GND function

NET— signal instructions.

D-R—–connect headphones-

D-T– connect the headset +.

SPKP—- connect the microphone –

MICP– connect microphone +.