The SIM800C GSM GPRS TTL Module gives your project the ability to send SMS (Short Message Service), make voice calls, and transfer GPRS (General Packet Radio Service) data over a mobile network. which means a sim800c gsm gprs board works across most networks on a single SIM. The module communicates with your microcontroller through a TTL (Transistor-Transistor Logic) serial interface using standard AT commands. AT commands are simple text instructions like “AT+CMGS” that tell the module to send an SMS.
The sim800c gsm module datasheet confirms it supports both SPP (Serial Port Profile) for data and audio services for voice — both on the same chip. One honest limitation to keep in mind — the module draws a surge current during network registration that a USB port cannot supply. A separate 5V to 9V DC adapter with enough current headroom is necessary to prevent unexpected resets. The power input also accepts a 3.7V lithium battery directly, which is useful for portable builds.
The gsm sim800c module with antenna works with Arduino, STM32, and Raspberry Pi through TTL serial pins. Students building SMS alert systems and engineers working on remote monitoring projects both use it regularly. To get started, wire TX and RX to your controller’s serial pins, open a serial terminal at 9600 baud, and type AT — a response of OK confirms the module is alive. StemVolt offers fast and reliable delivery of this module across India with trusted service support.
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Features:
- GSM and GPRS network support across 850, 900, 1800, and 1900 MHz allows global SIM card use
- TTL serial interface at standard baud rates connects directly without a level shifter on 3.3V boards
- Bluetooth v3.0 with SPP profile lets you send serial data wirelessly over short range
- sim800c gsm module datasheet confirms TTS (Text-to-Speech) output for audio alert projects
Technical specifications:
| Specification | Details |
|---|---|
| Network Band | GSM/GPRS 850/900/1800/1900 MHz |
| Interface | TTL Serial, Audio, Antenna, Power |
| Power Input | 5V–9V DC or 3.7V lithium battery |
| Bluetooth | v3.0 (SPP & Audio Services) |
| Features | TTS, DTMF, Audio In/Out |
Applications:
- SMS alert system uses this module to notify a phone number when a sensor triggers
- School attendance project sends daily parent notifications over GSM network automatically
- SIM800C GSM GPRS TTL Module reads gas sensor data and calls a number on dangerous levels
- sim800c gsm module sends GPRS data packets from a weather station to a remote web server
Package includes:
- 1 x SIM800C GSM GPRS TTL Module with Antenna


















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