Maduino Zero SIM800C

From MakerFabsWiki
Revision as of 02:01, 25 July 2019 by Charlin (talk | contribs) (GPRS/GSM test)

Jump to: navigation, search


Maduino Zero SIM800C is a one-stop solution for IOT (Internet of Things) projects, it integrate a micro Controller SAMD21G18A-AU, GRRS/GSM module SIM800C, on-board power management and storage, to make the Maduino Zero SIM800C ready for real project for IOT projects such as smart-home, outdoor monitoring, shared bicycle, etc. The GRPS/GSM module A6 support quad-band 850/900/1800/1900MHz, that covers any GSM network, after inserting a SIM card, then you will able to use the SMS/GPRS service of Cellular connectivity.
The Maduino Zero SIM800C based on the Arduino, users can program it with Arduino IDE, which is very easy especially suit for the none-programmers. There are also detailed guide for users to learn how to create the first IOT project with Maduino Zero SIM800C board, with which the starters can learn the hardware and programming skill quickly.

Model: OAC800SIM
Maduino Zero SIM800C 00.png


  • Powered by lithium battery 3.4-4.2V or USB(5V)
  • SAMD21G18A: 32-bit ARM® Cortex®-M0 up to 48MHz, 256KB flash, 32KB SRAM, LQFP48
  • Integrated Power Control System
  • Quad-band: 850/900/1800/1900Mz
  • Interface: I2C/SPI/UART/ADC/DAC/I2S/38*GPIO
  • Arduino Compatible
  • Working Temperature: -20 ~ +85℃
  • Default baud rate: 115200bps
  • Size: 40*55mm

Interface Function

①PWR: Power Indicator
②CHG: Charge Status Indicator
③VBAT: Lipo Battery Connector
④CHG: 5V power Input Connector, connect to the solar panel to charge the battery.
⑤Micro USB: 5V Power Input, USB to serial Communication
⑥RESET: Reset Button for SAMD21G18A-AU
⑦Serial Port Select:
D0&D1: Hardware serial port;
⑧A6 Serial Port for Firmware Updates
⑨GSM: Antenna IPX Connector


①Micro SIM Card Holder
②Micro SD Card Holder

Pins usage on Arduino

  • D0 – RX from SIM800C (Hardware Serial Communication Selected)
  • D1 – TX to SIM800C (Hardware Serial Communication Selected)
  • D2 - Unused
  • D3 - Unused
  • D4 - SD Card CS PIN(active Low)
  • D5 - connect to SIM800C UART1_DTR
  • D6 - Unused
  • D7 - Unused
  • D8 - Unused
  • D9 - Power ON Control of SIM800C (active High)
  • 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



SIM800C is a GPRS/GSM Quad-band module,and the update version support Bluetooth 3.0 EDR(some functions of SPP, OPP, HFP/HSP ), so The Maduino Zero SIM800C can be capable of the GPRS connectivity for Internet, to upload/download data with internet.with this board, we can use it as a data acquisition, remote control and a lot of IOT project or smart home project. The following simple example shows the starters how to access a website on the internet (Users need check the AT commands for how to access an website):

1.Insert a Micro SIM card
The Maduino Zero SIM800C board uses the micro SIM card that is widely used in Android phone, install the Micro SIM card to the holder as below picture.
Maduino Zero SIM800C 03.png
Note that some fee maybe needed for each SMS depends on your local GSM Operator, make sure that the SIM Card is active and enough money left for this application.
2.Connect the GSM Antenna and the 3.7V battery
Maduino Zero SIM800C 04.PNG
Note:The SIM800C Module can not work without the battery by current design.
3.Programming and Download
The Codes for this application is very simple, define the SIM800C Power control pins:

//define the power control pin of SIM808:
int POWER_KEY=9; //D9: power on/off

Connect to GPRS/GSM network

sendData("AT+CGATT=1", 1000, DEBUG);

Initialize HTTP Service

sendData("AT+HTTPINIT", 1000, DEBUG);

Set HTTP parameters value

sendData("AT+HTTPPARA=\"URL\",\"\"", 1000, DEBUG);

POST the data that set in command "AT+HTTPPARA"

sendData("AT+HTTPACTION=1", 1000, DEBUG);//HTTP POST success if get responce: +HTTPACTION: 1,200,0

Select the right port and Arduino board: Arduino Zero(Native USB Port) to upload the firmware to Maduino Zero SIM808 GPS board
Maduino Zero SIM800C 01D.PNG
4.Test Result
If the GPRS service accessible, the Maduino board post data to the site, open the Serial Tool we can see the logs as shown below:
Maduino Zero SIM800C 07A.png

Of course you can open the link: it will show the data:
Maduino Zero SIM800C 05.png

Note: AT Command:

AT+HTTPTERM //Terminal the HTTP

More details you can refer to the document SIM800 Series_AT Command Manual.pdf.

Cell ID Location test

You can use AT+CENG=3 and AT+CENG? to get MCC,MNC,LAC and CI.
Maduino Zero SIM800C 07B.png
Then we can show a rough location via GSM Cell ID shown as below image.
Maduino Zero SIM800C 05D.png


You can list you question here or contact with for technology support.