SIM900 – Hamtech Electronics Technologies https://hamtechtechnologies.com Sun, 30 Nov 2025 16:50:58 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.3 https://hamtechtechnologies.com/wp-content/uploads/2025/11/h-100x100.webp SIM900 – Hamtech Electronics Technologies https://hamtechtechnologies.com 32 32 SIM900 GSM Module https://hamtechtechnologies.com/product/sim900-gsm-module/ https://hamtechtechnologies.com/product/sim900-gsm-module/#respond Thu, 20 Nov 2025 19:51:28 +0000 https://hamtechtechnologies.com/index.php/product/sim900-gsm-module/ The SIM900 GSM/GPRS Module is a compact and reliable communication module widely used in IoT, remote monitoring, tracking systems, and wireless control applications.
It supports quad-band GSM frequencies, enabling global compatibility for SMS, voice calling, and GPRS data transmission.

The module communicates via UART (TX/RX), making it easy to interface with Arduino, ESP32, Raspberry Pi, and other microcontrollers.
It includes essential features such as onboard power regulation, antenna support, SIM card slot, status LEDs, and network indicators.
The SIM900 is ideal for projects that require wireless data logging, remote SMS alerts, GPS/GSM combined systems, and MQTT over GPRS communication.

Key Features

  • Quad-band GSM/GPRS (850/900/1800/1900 MHz)

  • Supports SMS, voice calls, and GPRS data

  • UART serial communication

  • Built-in TCP/UDP stack

  • Onboard SIM card holder

  • External antenna connector

  • Low power consumption

  • AT Command set support

  • Compatible with Arduino, ESP32, Raspberry Pi

Specifications

Feature Details
Operating Voltage 5V (module supply), 3.3V logic compatible
GSM Bands 850/900/1800/1900 MHz
Communication Interface UART (TX/RX), Baud: 9600–115200
GPRS Class 10
SMS Support Text & PDU mode
Voice Support Call in/out
Antenna External GSM antenna
Power Consumption Idle: ~20–30 mA, Peak: up to 2A
SIM Type Standard SIM
Dimensions ~40 × 40 mm (varies by board version)

Applications

  • SMS-based control systems

  • Remote monitoring & telemetry

  • IoT data transmission over GPRS

  • Vehicle tracking (with GPS module)

  • Home/industrial alert systems

  • GSM-based automation

  • Wireless sensor networks

  • MQTT via GSM/GPRS

Compatible Boards / Circuits

  • Arduino (Uno, Nano, Mega — ensure 2A power supply)

  • ESP32 / ESP8266

  • Raspberry Pi (via UART)

  • Works with GPS modules, relays, sensors, data loggers

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