Gboard

Overview

Gboard is a unique Arduino board which features a SIM900 GSM/GPRS module, an XBee socket, nRF24L01+ module interface and an ATMega328P controller. This board will add wireless XBee / nRF24L01+ control as well as GSM/GPRS connectivity to your projects. It’s great for anything from home automation to robot control. The possibilities are endless!

Gboard can be used as a GSM/GPRS data transfer or wireless communication project development platform. Gboard support wide range power supply and Micro SD for mass storage. There are some 3pin electronic brick/ sensor brick interface breakout on board, it offer an easy way for a quick prototyping. The board requires FTDI basic board to upload sketch, you can use our Foca board to do it.

Note:

1. There is no USB connector on the board nor is there any USB hardware, you have to use a serial connection or ICSP.
2. When you upload sketch to Gboard, please choose the board Arduino Duemilanove w/ ATmega328.
3. The bootloarder file is ATmegaBOOT_168_atmega328.hex, you can find it in the directory arduino\hardware\arduino\bootloaders\atmega
4. The serial interface (bootloader connection) is 3.3v, not the typical 5v as on many Arduino boards - anyone using an alternative to the Foca board must take note not to risk damage.

Go shopping Gboard (SKU:IM120411004)

Spec

PCB size	88.1mm X 60.7mm X 1.6mm
Power supply	7-23V DC
Microprocessor	Atmega328
Indicators	PWR, Status, NET
RoHS	Yes

Electrical Characteristics

Specification	Min.	Typical Value	Max.	Unit
Power Voltage	7	-	23	VDC
Input Voltage VH (Target Voltage = 3.3V)	3	3.3	3.6	V
Input Voltage VL:	-0.3	0	0.5	V
Current Consumption	-	100	500	mA

Hardware

UART Setting Jumpers

The SIM900 module and XBee module communicate to ATMega328 through UART. They cannot be used with the same port at the same time, so there are two UART setting jumpers to configure the UART communication. The figure of UART setting jumpers is as below.

Figure of UART setting jumpers

D0 and D1 are hardware UART ports of Arduino. D2 and D3 are digital GPIO of Arduino. There are two configurations to set the UART communication.

Description	UART Setting Jumpers Connection	Figure
Hardware UART to SIM900, Software UART to Specific	ST – D0(Hardware Rx of Arduino) SR – D1(Hardware Tx of Arduino) XT – D2(Software Rx/Tx of Arduino) XR – D3(Software Rx/Tx of Arduino)
Software UART to SIM900, Hardware UART to Specific	XT – D0(Hardware Rx of Arduino) XR – D1(Hardware Tx of Arduino) ST – D2(Software Rx/Tx of Arduino) SR – D3(Software Rx/Tx of Arduino)