Arch GPRS is an mbed enabled development board that houses a cellular networking module along with a microcontroller. It is similar to the Seeeduino Arch in that it also uses the LPC11U24 Microcontroller. With the Arch GPRS, you can use the mbed C/C++ SDK, libraries and optimizing online development tools to rapidly build your prototype. The cellular networking module on the Arch GPRS is based on the EG-10 GPRS modem. With this, data collection functions can be performed easily using the 2G GSM based cellular network.
Arch GPRS has a standard Arduino interface as well as Grove connectors on board. It’s convenient to connect existing Shields and Grove products to Arch GPRS. You can even connect a solar panel directly to the board to allow for the battery to charge from it. A low-power design guarantees easy charging and long hour operations when outdoors.


  • online development tools
  • easy to use C/C++ SDK
  • lots of published libraries, projects
  • Low power ARM Cortex-M0 Core
  • 32KB Flash, 8KB RAM, 4KB EEPROM
  • USB Device, 2xSPI, UART, I2C
  • Support wireless upgrade EG-10 firmware
  • Support external SIM card:1.8V/3.3V
  • Compatible standard AT Command


Item Specification
Microcontroller LPC11U24
Supply Mode USB or Solar Panel
Charge Current Solar panel 100 mA
USB 5V 400 mA
Work Frequency 850/900/1800/1900 MHz
Interface Type USB Micro B
SIM Card Class B(3V) and Class C(1.8V)
GPRS Characteristics GPRS data transmission downlink 85.6kbps(Max);uplink 42.8kbps(Max)
Codes format CS-1,CS-2,CS-3,CS-4
Function Support Support for Data, Voice, SMS, and Fax
EEPROM Capacity 256 KB


Yellow Area is very similar in fashion to an Arduino board, and in fact it is used as such with our Shield board. Its pin destribution is almost the same as Seeeduino Arch(D11 and D13 are swaped), so you can click here to observe each pin.

The above picture is the front view of Arch GPRS, Microcontroller LPC11U24 in back has not been marked out.

Getting Started

Insert a SIM card into SIM Socket of Arch GPRS, you can dial a phone number or send messages. Now let's get started.
Step one:Sign up a mbed account

Step two:Import Program

Step three:Edit code

Step four:Add a device

Step five:Compile、download

Step six:Updata firmware

Quick press Arch GPRS's button and wait a moment, you will hear Arch GPRS calling you.

ARCH GPRS With Xively

Xively is an on-line database service allowing developers to connect sensor-derived data (e.g. energy and environment data from objects, devices & buildings) to the Web and to build their own applications based on that data. By using ARCH GPRS we can easily realize this.
Step one:Sign up a Xively account

Step two:Add your own device and Channels

Step three:Import program

Step four:Add your own information

Step five:check your sensor value

If you use Seeeduino Arch on MAC or Linux, please read the application note --- USB ISP programming.

Programming Seeeduino Arch on Windows, Linux or Mac

Seeeduino Arch doesn't have an mbed interface. It uses USB In-System-Programming(ISP) to upgrade the firmware.

To enter the USB ISP mode, connect the Arch with your computer and long press its button, and then a disk named "CRP DISABLD" will appear.

  1. delete firmware.bin in the "CRP DISABLD" disk.
  2. copy a new firmware into the disk.
  1. if the disk is not mounted, mount the disk at {mnt_dir}
  2. dd if={new_firmware.bin} of={mnt_dir}/firmware.bin conv=notrunc
  1. dd if={new_firmare.bin} of=/Volumes/CRP\ DISABLD/firmware.bin conv=notrunc
If you're so inclined, you can also create an Automator application to support drag-and-drop of the file to your board. Just create a "Run Shell Script" with the following command:
dd if=$* of=/Volumes/CRP\ DISABLD/firmware.bin conv=notrunc

Quick press the button to run the new firmware.

See Also


Arch GPRS doesn't come with an mbed interface. To output debug messages, please try USBSerial.


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