SIM800L GPRS GSM Module Micro SIM Card Core Board Quad-band TTL Serial Port

Description

1. Communication Technology: The SIM800L is a quad-band GSM/GPRS module, which means it supports four different frequency bands for global coverage. These frequency bands are 850 MHz, 900 MHz, 1800 MHz, and 1900 MHz.
2. SIM Card: To use the module, you need to insert a valid SIM card from a mobile network provider. The module uses this SIM card for communication over the cellular network.
3. Serial Communication: The module communicates with a host microcontroller or computer through a TTL serial interface, making it compatible with various microcontrollers, including Arduino and Raspberry Pi.
4. AT Commands: Communication with the SIM800L is typically done by sending AT (Attention) commands over the serial interface. These commands allow you to perform actions like sending SMS messages, making calls, and establishing GPRS data connections.
5. Antenna: The module usually comes with an antenna, which is essential for ensuring a reliable cellular connection. The antenna is connected to the module through a coaxial connector.
6. Voltage Requirements: The module typically operates at a voltage of 3.4V to 4.4V DC.
7. Low Power Consumption: The SIM800L is designed to be power-efficient, making it suitable for battery-powered applications.
8. Audio Support: It supports audio features, allowing you to make and receive calls.
9. SMS Messaging: You can send and receive SMS messages using the module. It can also handle SMS storage and management.
10. GPRS Data Connection: The SIM800L can establish a GPRS (General Packet Radio Service) data connection, enabling devices to transmit and receive data over the internet.
11. TCP/IP Support: It has basic TCP/IP stack support, allowing you to create simple IoT applications that can send and receive data via the internet.
12. GPIO Pins: Some versions of the SIM800L may include GPIO pins for interfacing with external devices.
13. LED Indicators: The module may have LED indicators to show its status, such as power, network registration, and data transmission.
14. Form Factor: The module typically comes as a compact board that can be integrated into various electronic projects.
15. Applications: The SIM800L is commonly used in applications such as GPS trackers, remote monitoring systems, SMS-based control systems, and IoT devices.