




SIM800L GSM GPRS Module
The SIM800L is a compact and cost-effective GSM/GPRS module that enables cellular connectivity for embedded projects. It supports quad-band frequencies, making it compatible with networks worldwide, and offers features such as GPRS data transmission, SMS messaging, and voice calls. Designed with a small footprint, it is ideal for applications requiring reliable long-range communication.
Once powered, the module automatically boots, searches for available cellular networks, and registers seamlessly. An onboard LED indicates network status: fast blinking for no coverage and slow blinking when connected. The SIM800L operates at 3.8–4.2V with a peak current requirement of up to 1A.
Specification:
- Chip: SIM800L
- Supply voltage: 4.8V - 5.0V
- Recommended Supply Voltage: 5V
- Sleep mode < 2.0mA
- Idle mode < 7.0mA
- GSM transmission (avg): 350 mA
- GSM transmission (peek): 2000mA
- Module size: 25 x 23 mm
- Interface: UART (max. 2.8V) and AT commands
- SIM card socket: Micro SIM (Bottom side)
- Supported frequencies: Quad Band (850 / 950 / 1800 /1900 MHz)
- Antenna connector: IPX
- Status signaling: LED
- Working temperature range: -40 do + 85 ° C
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.
- MIC +, MIC -Microphone
- SPK +, SPK- Speaker
Pinout (Bottom Side Right):
- NET - Antenna
- VCC - Supply Voltage
- RST - Reset
- RXD - Serial communication
- TXD - Serial communication
- GND - Ground
Applications
- Home Alarm System: When a motion sensor detects a movement of an intruder, an SMS will be sent to a predefined number which could be you or your security reaction company and a siren or any other sound device could be triggered in the process as well.
- Remote Controlling System: A mobile phone can be used to Send an SMS to switch ON/OFF remote devices. You could control your entire home devices, switching ON/OFF lights, fans, pool motor, garage motor and so on with just a simple SMS from a distance.
- Security Access Control: A security access can be implemented at apartments or housing complexes. A security guard could inform by intercom a resident if he/she has a visitor at the main gate. with a replied SMS, the resident could open remotely the gate for his/her visitor.
- Remote System Monitoring: In a remote system monitoring application, a Microcontroller for example could be used to constantly monitor the status of a remote sensors, let say temperature or moisture sensors. If a certain condition is reached, the program will send an SMS to notify the situation.
Package Included:
1 X SIM800L GSM/GPRS Module
1 X Antenna
1 X Pin header set (Soldered)