SIM900 module 4-band

SIM900 module 4-banddevelopment boardGSMGPRSSMSwireless data super TC35I موديول جي اس ام /جي بي اس   instructions for use The computer can debug USB–TTL. The power supply of this module is: 5V-26V. If the 5V power supply must be above 2A, a 9V power supply is recommended. After plugging in the Arduino motherboard, the power supply must be able to provide 2A of current. The reason is that the GPRS Shield requires a maximum of 2A for power-on current and peak working current, but the USB port cannot provide such a large current, so an external power supply device must be connected. The other power supply port pin header leads to 3.7–4.5V power supply, which is suitable for lithium battery power supply. Serial port, compatible with Arduino microcontroller. The TTL serial port is compatible with 3.3 and 5V microcontrollers. Make sure your SIM card is not locked The best baud rate for GPRS Shield communication is 19200 bps 8-N-1 (GPRS Shield automatically pairs the baud rate by default) Refer to the picture below 1. Provide 2 types of antenna interfaces, compatible with various needs. This product is shipped with an antenna, and the antenna comes with an adapter cable, so it is compatible with 2 interfaces. 2. SIM900 can be connected to any 2 pins of Arduino from D0 to D7 through jumper cap settings, not just the hardware UART that can only use D0D1. 3. Debug toggle switch, you can set the DEBUG port of SIM900 to connect to Arduino or connect to PC through ATMEGA8U2/FT232 on Arduino for debugging. 4. Audio and microphone port leads out. 5. There are multiple IO ports of SIM900. If necessary, you can use Dupont wires to connect the pins. Please refer to the schematic diagram and datasheet for specific pins. 6. 3 status indicators, and 3 buttons – the power on button can be controlled by the software using Arduino pins to POWER ON SIM900. 7. 3.3V and 5V automatic level compatible, can adapt to 3.3V or 5V main control board, support other 3.3V platform development boards such as leaf maple and Chipkit.        The GPRS Shield is based on SIM900 module from SIMCOM and compatible with Arduino and its clones. The GPRS Shield provides you a way to communicate using the GSM cell phone network. The shield allows you to achieve SMS, MMS, GPRS and Audio via UART by sending AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands). The shield also has the 12 GPIOs, 2 PWMs and an ADC of the SIM900 module(They are all 2V8 logic) present onboard. Features § Quad-Band 850 / 900/ 1800 / 1900 MHz – would work on GSM networks in all countries across the world. § GPRS multi-slot class 10/8 § GPRS mobile station class B § Compliant to GSM phase 2/2 § Class 4 (2 W ＠ 850 / 900 MHz) § Class 1 (1 W ＠ 1800 / 1900MHz) § Control via AT commands – Standard Commands: GSM 07.07 & 07.05 | Enhanced Commands: SIMCOM AT Commands. § Short Message Service – so that you can send small amounts of data over the network (ASCII or raw hexadecimal). § Embedded TCP/UDP stack – allows you to upload data to a web server. § RTC supported. § Selectable serial port. § Speaker and Headphone jacks § Low power consumption – 1.5mA(sleep mode) § Industrial Temperature Range – -40°C to 85 °C Specifications Application Ideas § M2M (Machine 2 Machine) Applicatoions. § Remote control of appliances. § Remote Weather station or a Wireless Sensor Network. § Vehicle Tracking System with a GPS module. Cautions § Make sure your SIM card is unlocked. § The product is provided as is without an insulating enclosure. Please observe ESD precautions specially in dry (low humidity) weather. § The factory default setting for the GPRS Shield UART is 19200 bps 8-N-1. (Can be changed using AT commands). § Power select – select the power supply for GPRS shield(external power or 5v of arduino) § Power jack – connected to external 4.8~5VDC power supply § Antenna interface – connected to external antenna § Serial port select – select either software serial port or hareware serial port to be connected to GPRS Shield § Hardware Serial – D0/D1 of Arduino § Software serial – D7/D8 of Arduino § Status LED – tell whether the power of SIM900 is on § Net light – tell the status about SIM900 linking to the net § UART of SIM900 – UART pins breakout of SIM900 § Microphone – to answer the phone call § Speaker – to answer the phone call § GPIO,PWM and ADC of SIM900 – GPIO,PWM and ADC pins breakout of SIM900   § Power key – power up and down for SIM900