Library Description

The library initializes and defines the I2C bus driver and drivers that offer a choice for writing data in the register. The library includes a function for calibration chip for measurement, a function for reading moisture data. The user also has the function for initializes chip, set offset, gain and clock divider and software reset.

Key functions :

uint8_t moisture_init(uint16_t gain, uint16_t offset, uint16_t clk_div) - Functions for initialize the chip
uint8_t moisture_getData() - Functions for measurement data in percent.
void moisture_calibration() - Functions for calibration chip for measurement

Example description

The application is composed of three sections :

• System Initialization - Initializes I2C module
• Application Initialization - Initializes Driver init and sets moisture gain, offset data and clock divider. Calibration chip for measurement - don't touch the sensor while calibrating.
• Application Task - (code snippet) - Measure moisture data in percentage every 500ms. To make the measurement successful, touch the sensor and wait until values are stabilized.

void applicationTask()
{
 mikrobus_logWrite(" Moisture data : ", _LOG_TEXT);
 moistureData = moisture_getData();
 IntToStr(moistureData, demoText);
 mikrobus_logWrite(demoText, _LOG_LINE);
 Delay_ms( 500 );
}

Other mikroE Libraries used in the example:

• I2C
• UART

Additional notes and information

Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.