This SIM900 GSM / GPRS Module is useful for using a cell phone network to talk to your microcontrollers wirelessly. Just wire it up to your microcontroller and you’ll have quad-band GSM network access anywhere in the world! Pop in a GSM simcard to send/receive calls and messages from your projects like you would with a cell phone. There are three protocols you can use to send messages: Short Message Service, Audio, or GPRS Service.
Specifications:
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- Supports standard size GSM sim cards
- Chipset: SIM900A
- Quad-Band 850 / 900/ 1800 / 1900 MHz (works on GSM networks in any country)
- The module is configured and controlled using simple AT commands via the onboard UART:
- Standard Commands: GSM 07.07 & 07.05
- Enhanced Commands: SIMCOM AT Commands
- Has 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.
- Physical Features:
- External GSM Antenna with SMA connector
- SIM Card holder (Flip Style)
- Call Indicator LED
- Onboard Serial RS232 interface foreasy debugging (3 pins on the left, see diagram for how to wire to an RS232 connector)
- Onboard reset and restart solder points
- Additional antenna can be added with IPX mini connector
- Yellow Logic Level Select Pins: select between 5V and 3.3V interface (yellow pins)
- Power Wires (red and black)
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- SIM900A Serial Port Output Terminal
- Power Voltage (to be attached across the red and black wires): 5V DC (1A or higher is recommended)
- Arduino & Raspberry Pi Compatible
- Built in surge protection & SMF05C chip onboard for electrostatic protection
- Dimensions: 50 x 50 mm
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