NoticeIComSat
From ITEAD Wiki
Contents
Overview
IComsat is a GSM/GPRS shield for Arduino and based on the SIM900 Quad-band GSM/GPRS module. It is controlled via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands), and fully compatible with Arduino / Iteaduino and Mega.
Features
- Quad-Band 850/900/1800/1900MHz
- GPRS multi-slot calss 10/8
- GPRS mobile station class B
- Compliant to GSM phase 2/2+
- Class 4 (2W@850/900MHz)
- Class 1 (1W@1800/1900MHz)
- Control via commands (GSM 07.07, 07.05 and SIMCOM enhanced AT Commands)
- Short message service
- Free serial port selection
- All SIM900 pins breakout
- RTC supported with Super Cap
- Power on/off and reset function supported by Arduino interface
Specifications
| PCB size | 77.2mm X 66.0mm X 1.6mm |
| Indicators | PWR, status LED, net status LED |
| Power supply | 9~20V, compatible with Arduino |
| Communication Protocol | UART |
| RoSH | Yes |
Electrical Characteristics
| Parameter | Min. | Typical | Max. | Unit |
| Power voltage (Vlogic) | 4.5 | 5 | 5.5 | VDC |
| Input voltage (Vsupply) | 9 | - | 20 | V |
| Input voltage VH | 4.5 | 5 | 5.5 | V |
| Input voltage VL | -0.3 | 0 | 0.5 | V |
| Current Consumption(pulse) | - | - | 2000 | mA |
| Current Consumption(Continues) | 500 | mA | ||
| Baud rate | 9600 | bps |
Hardware
Figure 1 Top Map
| Interface | Pin | Description |
| GPIOs | 1 | VDD |
| GPIOs | 2 | GND |
| GPIOs | 3 | GPIO1 |
| GPIOs | 4 | GPIO2 |
| GPIOs | 5 | GPIO3 |
| GPIOs | 6 | GPIO4 |
| GPIOs | 7 | GPIO5 |
| GPIOs | 8 | GPIO6 |
| GPIOs | 9 | GPIO7 |
| GPIOs | 10 | GPIO8 |
| GPIOs | 11 | GPIO9 |
| GPIOs | 12 | GPIO10 |
| GPIOs | 13 | GPIO11 |
| GPIOs | 14 | GPIO12 |
| GPIOs | 15 | GND |
| GPIOs | 16 | VDD |
| UART | 1 | GND |
| UART | 2 | DTR |
| UART | 3 | RI |
| UART | 4 | DCD |
| UART | 5 | CTS |
| UART | 6 | RTS |
| UART | 7 | TXD |
| UART | 8 | RXD |
| IIC&PWM | 1 | GND |
| IIC&PWM | 2 | GND |
| IIC&PWM | 3 | IIC_SCL |
| IIC&PWM | 4 | IIC_SDA |
| IIC&PWM | 5 | PWM2 |
| IIC&PWM | 6 | PWM1 |
| IIC&PWM | 7 | GND |
| IIC&PWM | 8 | GND |
| Debug_Port | 1 | GND |
| Debug_Port | 2 | PERKEY |
| Debug_Port | 3 | DBG_RXD |
| Debug_Port | 4 | DBG_TXD |
VDD = 3.0V
Note1: the operation level of the port is 3.0V
