NoticeRASPBERRY PI SIM900 GSM/GPRS ADD-ON
From ITEAD Wiki
Contents
Overview
Raspberry PI GSM Add-on is customized for Raspberry Pi interface based on SIM900 quad-band GSM/GPRS module. AT commands can be sent via the serial port on Raspberry Pi, thus functions such as dialing and answering calls, sending and receiving messages and surfing on line can be realized. Moreover, the module supports powering-on and resetting via software.
Features
- Quad-Band 850/ 900/ 1800/ 1900 MHz
- GPRS multi-slot class 10/8GPRS 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 (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)
- Low power consumption: 1.5mA(sleep mode)
- Operation temperature: -40°C to +85 °C
Specifications
| PCB size | 73.8mm X 70mm X 1.6mm |
| Input voltage | 5V |
| Interface | UART |
| Baud rate | 9600 (default) |
Electrical characteristics
| Parameter | Min. | Typical | Max. | Unit |
| Supply voltage | - | 5 | 5.5 | VDC |
| Current consumption (average) | - | 500 | - | mA |
| Instantaneous current consumption | - | - | 2 | A |
Hardware
Pinmap
Raspberry PI interfaces
| Raspberry PI Pin N.O. | Pin name | Pin of SIM900 Module | Description |
| 11 | GPIO0 | SIM900-PWERKEY | Powering-on key via software |
| 12 | GPIO1 | SIM900-RST | Resetting key via software |
| 13 | GPIO2 | - | |
| 15 | GPIO3 | - | |
| 16 | GPIO4 | - | |
| 18 | GPIO5 | - | |
| 22 | GPIO6 | - | |
| 7 | GPIO7 | - | |
| 3 | SDA0 | - | |
| 5 | SCL0 | - | |
| 24 | CE0 | - | |
| 26 | CE1 | - | |
| 19 | MOSI | - | |
| 21 | MISO | - | |
| 23 | SCLK | - | |
| 8 | TXD | SIM900_RX | Receiving end for SIM900 serial port |
| 10 | RXD | SIM900_TX | Sending end for SIM900 serial port |
| 2 | +5V | - | |
| 1 | +3.3V | - | |
| 6 | GND | - |
