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About Azure Sphere MT3620 Grove Shield Library

This is library for Azure Sphere MT3620 Grove Shield, the shield enhences Azure Sphere by adding I2C interface and Analog input.

Requirements

Create a MT3620 application

Review the Azure Sphere documentation for the guide to setting up the developer tools and Azure Sphere SDK on Windows 10 or Ubuntu 18.04.

MT3620 Grove Shield App Manifest

Select app_manifest.json in the application project, add the below attributions, so that we can use the peripherals that MT3620 Grove Shield would use.

"Capabilities": {
	"Gpio": [ 8, 9, 10, 15, 16, 17, 18, 19, 20, 12, 13, 0, 1, 4, 5, 57, 58, 11, 14, 48 ],
	"Uart": [ "ISU0", "ISU3" ],
	"AllowedApplicationConnections": []
}

When using a hardware definition file, you must use an identifier for app_manifest.json.

"Capabilities": {
	"Gpio": [ "$MT3620_GPIO8", "$MT3620_GPIO9", "$MT3620_GPIO10", "$MT3620_GPIO15", "$MT3620_GPIO16", "$MT3620_GPIO17", "$MT3620_GPIO18", "$MT3620_GPIO19", "$MT3620_GPIO20", "$MT3620_GPIO12", "$MT3620_GPIO13", "$MT3620_GPIO0", "$MT3620_GPIO1", "$MT3620_GPIO4", "$MT3620_GPIO5", "$MT3620_GPIO57", "$MT3620_GPIO58", "$MT3620_GPIO11", "$MT3620_GPIO14", "$MT3620_GPIO48" ],
	"Uart": [ "$MT3620_ISU0_UART", "$MT3620_ISU3_UART" ],
	"AllowedApplicationConnections": []
}

Here for details of the hardware definition file.

Some available header files

  • Grove.h
  • Sensors/Grove4DigitDisplay.h
  • Sensors/GroveRelay.h
  • Sensors/GroveTempHumiBaroBME280.h
  • Sensors/GroveTempHumiSHT31.h
  • Sensors/GroveAD7992.h
  • Sensors/GroveOledDisplay96x96.h
  • Sensors/GroveRelay.h
  • Sensors/GroveRotaryAngleSensor.h
  • Sensors/GroveLEDButton.h
  • Sensors/GroveLightSensor.h

Usage of the library, see Example - Temp and Huminidy SHT31

  1. Add headers
#include "Grove.h"
#include "Sensors/GroveTempHumiSHT31.h"
  1. Initialize the shield in main() function
int i2cFd;
GroveShield_Initialize(&i2cFd, 115200); // baudrate - 9600,14400,19200,115200,230400 
  1. Initialize and instantiation
void* sht31 = GroveTempHumiSHT31_Open(i2cFd);
  1. Read temp and humidiy from the sensor
GroveTempHumiSHT31_Read(sht31);
float temp = GroveTempHumiSHT31_GetTemperature(sht31);
float humi = GroveTempHumiSHT31_GetHumidity(sht31);

About

C library, Azure Sphere, MT3620 Grove Shield, I2C, Analog, SC18IM700, AD7992, Visual Studio 2017

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