Description

Chip: SIM800L Voltage: 3.7-4.2V Support networks:  Mobile network and global quad-band network Module size: 2.5cmx2.3cm TTL serial port for serial port, you can link directly to the microcontroller. No need MAX232 Power module automatically boot, homing network Onboard signal lights all the way . It flashes slowly when there is a signal, it flashes quickly when there is  no signal Seven 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 +.