Maduino A7 User manual

Maduino GPRS GPS A7 v1.5 user manual
Maduino GPRS GPS A7 is a main board based on the ATmega328 and GPRS/GSM GPS
module A7. Which onboard with Lipo battery charge circuit and a micro SD card holder.
We use the Arduino pro mini 3.3V 8MHz bootloader in this board and use the CP2104 as
USB to serial to upload the code byArduino IDE.
A7 supports quad-band 850/900/1800/1900MHz that covers any GSM network in
the world. Simply insert a 2G Micro SIM card, then you are able to enchant things with
cellular connectivity.
With this board, you will easy to add text, SMS and data to your project. It is good for your
smart home project or GPS tracker and so on.
Features:
BAT Input Voltage: 3.4-4.2V
ATmega328: 8MHz, 32KB flash, 2KB SRAM
Micro SIM connector
Integrated Power Control System
SupportAT Command
Quad-band: 850/900/1800/1900Mz
Support GPS
Support GPRS data traffic, the maximum data rate, download 85.6Kbps,
upload 42.8Kbps
Support SMS text messaging
Interface: I2C/SPI/UART/18*GPIO
Arduino compatible
Working Temperature: -40 –85℃
Default baud rate: 115200
Size: 40*55mm
Interface:

1. PWR: Power indicate
2. CHG: Charge indicate
3. VBAT: 3.7V Lipo battery connector
4. GPS: GPS Antenna IPX Interface
5. GSM: GPRS/GSM Antenna IPX Interface
6. CHG: 5V power input, can connect the solar panel to charge the lipo battery.
7. STA: A7 status indicate
8. Micro USB: 5V power input, USB to serial communication
9. A7 serial port for firmware update
10. RESET: Reset button for ATmega328
11. Serial port select (D0, D1 hardware serial port D7,D8 Software serial port)

1. Micro SIM Card holder
2. Micro SD Card holder
Pins usage on Arduino
D0 - Unused if you select hardware serial port to communicate with A7
D1 - Unused if you select hardware serial port to communicate with A7
D2 - Unused
D3 - Unused
D4 –SD Card CS PIN
D5 –Low power control of A7 Low level active
D6 –Power OFF of A7 High lever active
D7 - Used if you select software serial port to communicate with A7
D8 - Used if you select software serial port to communicate with A7
D9 –Power ON of A7 High lever active (High level more than 3S then Set LOW level)
D10 - Unused
D11 - Unused
D12 - Unused
D13 - Unused
D14(A0) - Unused
D15(A1) - Unused

D16(A2) - Unused
D17(A3) - Unused
D18(A4) - Unused
D19(A5) - Unused
Usage:
Hardware installation
1. Insert an Micro SIM card and Micro SD card
2. Connect the Antenna

3. Connect the 3.7V Lipo battery
4. Connect the USB Cable

5. A7 GPRS HTTP Test
Please select the board: Arduino pro mini 3.3V 8MHz
Upload the code AT GPRS HTTP Test.ino

Open the serial monitor and set the baud rate as 9600, see the print information.

6. Get GPS information
AT Command:
AT+GPS=1 //open GPS (NEMA information output from GPS_TXD
PIN, but in this board not breakout this pin, please set GPS info output
from AT Command serial port)
AT+GPS=0 //close GPS
AT+GPSRD=N //NEMA information output N second form serial port
AT+GPSRD=0 // Close the GPS information output form serial port

7. SD card test
Open the demo code Files->Examples->SD->ReadWite