SIM800L V2.2 5V Wireless QUAD-BAND GSM/GPRS module's serial port is compatible with both 3.3V and 5V. The main advantages of this modules is the ability to connect it directly to 5V microcontroller such as Arduino.

Specifications:

Features:

• Network support: Quad-Band 850/900/1800/1900 MHz – works on GSM networks in all countries across the world.
• TTL serial interface compatible with 3.3V and 5V MCU
• The small size is suitable for all kinds of sleeve belt types and embedded.
• playing card slot, convenient change mobile phone card. Can side reserve replacement cell phone bayonet into the box.
• using the IPX interface can arbitrarily change the antenna. The default PCB antenna greatly reduces: use the of space.
• the board with gold plated board, more stable performance.
• when wiring neat guarantee board running more stable.
• this module adds a protection device, which can realize the prevention, high pressure, reduce the loss of the board, suitable for the project and learn.

Pin Description:

• 5V: Connect to 5VDC
• GND: Connect to GND
• VDD: If the development board's TTL level is 5V (Example: UNO, Mega, Nano), then supply 5V. If it is 3.3V (Example: NodeMCU), then supply 3.3V.
• SIM_TXD: SIM module Transmitter
• SIM_RXD: SIM module Receiver
• GND: If this pin is unused, keep open
• RST: RST the module, if this pin is unused, keep open