soil_sensor.h File Reference

#include "driver/gpio.h"
#include "esp_err.h"
#include "general/adc.h"

Include dependency graph for soil_sensor.h:

Go to the source code of this file.

Data Structures
struct	soil_sensor

Macros
#define	SOIL_CALIB_DRY_MV   2700
#define	SOIL_CALIB_WET_MV   1100
#define	ADC_SAMPLE_NUM   10

Functions
int	soil_sensor_init (soil_sensor *sensor)
	Initialize the soil moisture sensor.
int	soil_sensor_read (soil_sensor *sensor)
	Read soil moisture percentage.

Macro Definition Documentation

ADC_SAMPLE_NUM

#define ADC_SAMPLE_NUM   10

SOIL_CALIB_DRY_MV

#define SOIL_CALIB_DRY_MV   2700

SOIL_CALIB_WET_MV

#define SOIL_CALIB_WET_MV   1100

Function Documentation

soil_sensor_init()

int soil_sensor_init

(

soil_sensor *

sensor

)

Initialize the soil moisture sensor.

Configures ADC channel and power GPIO. Call once before soil_sensor_read().

Parameters

sensor

Pointer to soil_sensor (channel_pin, power_pin must be set)

Returns

ESP_OK on success, error code otherwise

soil_sensor_read()

int soil_sensor_read

(

soil_sensor *

sensor

)

Read soil moisture percentage.

Powers sensor, samples ADC, and updates sensor->percentage (0–100).

Parameters

sensor

Pointer to initialized soil_sensor

Returns

ESP_OK on success, error code otherwise