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This is a GSM Modem with a simple to implement RS232, TTL Serial,Use it to send SMS, make and receive calls, and do other GSM operations by simple AT commands through a serial interface from microcontrollers and computers. It uses the highly popular SIM900A module for all its GSM operations. It comes with a standard RS232 interface which can be used to easily interface the modem to microcontrollers and computers. The modem also features a serial TTL interface option. All modem operations(sending and receiving messages, calls, etc) can be carried out by sending AT commands to this virtual serial port though a serial terminal program. Download buku lancar membaca untuk anak tk mp3.

Most programming languages allow sending and receiving serial commands to a serial port and can be used to write softwares that can operate the modem without the need to implement any complex interface. This makes the modem a great choice if you plan to use GSM features on a computer.SIM900A.

Specifications: • Power supply: Single supply voltage 9V to 12V(DC). • Onboard power ON and Network indication LED. • Onboard provision to select the power on mode of SIM900A (manual or auto) using jumper. • RS232 output to connect directly to computer. • Serial TTL onboard pin to directly connected to microcontroller. • Onboard Audio(speaker and microphone) interface pins. • Onboard pwm and ADC channels.

Hardware Specifications • SIM800 Quad Band GSM Module • Voltage Supply- 3.7VDC to 4.2VDC • GSM- Speaker, Mic, TTL Rx and TTL Tx Outputs • Provision for GSM Antenna Applications • GPRS Connectivity for serial/legacy devices such as Energy Meters, SCADA Systems, PLC, Machine Automation devices, RFID etc. • Accurate timing for clocks and other systems from GPRS • GSM/GPRS based reporting systems UNIQUE ADVANTAGES • This device is completely our own development • Almost any modification that is possible can be done on custom requirement • Tested for reliability and ruggedness • Repairable • Made in India.