Features:

• Quad-band 850/900/1800/1900MHz
• Connect onto any global GSM network with any 2G SIM (in the USA, T- Mobile is suggested).
• Make and receive voice calls using a headset or an external 8 speaker and electret microphone.
• Send and receive SMS messages.
• Send and receive GPRS data (TCP/IP, HTTP, etc.) .
• Scan and receive FM radio broadcasts.
• Lead out buzzer and vibrational motor control port.
• AT command interface with “auto baud” detection.

Set includes:

• Chip: SIM800L
• Voltage: 3.7-4.2V
• Support networks: China Mobile, China Unicom 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

Pinout (bottom side – left):

• RING (not marked on PBC, first from top, square) – LOW state while receiving call
• DTR – sleep mode. Default in HIGH state (module in sleep mode, serial communication disabled). After setting it in LOW the module will wake up.
• MICP, MICN – microphone (P + / N -)
• SPKP, SPKN – speaker (P + / N -)

Pinout (bottom side – right):

• NET – antenna
• VCC – supply voltage
• RESET – reset
• RXD – serial communication
• TXD – serial communication
• GND – ground

Package:

1x Pack SIM800L GPRS GSM Module