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The STCC4 is Sensirion’s next generation miniature CO2 sensor for indoor air quality applications. Based on the thermal conductivity sensing principle and Sensirion’s CMOSens® technology, the STCC4 enables monitoring of CO2 gas concentration in ambient indoor air conditions at an unmatched cost-effectiveness and form factor. SMD assembly as well as tape & reel packaging allows cost- and space-effective integration of the STCC4 for high-volume applications. The STCC4 is 100% factory-calibrated and enables automatic on-board compensation of the CO2 output for humidity and temperature through an external SHT4x sensor.
LibDriver STCC4 is a full-featured driver for STCC4, launched by LibDriver.It provides CO2 reading, temperature reading, humidity reading and additional features. LibDriver is MISRA compliant.
/src includes LibDriver STCC4 source files.
/interface includes LibDriver STCC4 IIC platform independent template.
/test includes LibDriver STCC4 driver test code and this code can test the chip necessary function simply.
/example includes LibDriver STCC4 sample code.
/doc includes LibDriver STCC4 offline document.
/datasheet includes STCC4 datasheet.
/project includes the common Linux and MCU development board sample code. All projects use the shell script to debug the driver and the detail instruction can be found in each project's README.md.
/misra includes the LibDriver MISRA code scanning results.
Reference /interface IIC platform independent template and finish your platform IIC driver.
Add the /src directory, the interface driver for your platform, and your own drivers to your project, if you want to use the default example drivers, add the /example directory to your project.
You can refer to the examples in the /example directory to complete your own driver. If you want to use the default programming examples, here's how to use them.
#include "driver_stcc4_basic.h"
uint8_t res;
uint32_t i;
uint32_t times = 3;
int16_t co2_ppm;
float temperature;
float humidity;
/* basic init */
res = stcc4_basic_init(STCC4_ADDRESS_0);
if (res != 0)
{
return 1;
}
...
/* loop */
for (i = 0; i < times; i++)
{
/* delay 5000ms */
stcc4_interface_delay_ms(5000);
/* read data */
res = stcc4_basic_read((int16_t *)&co2_ppm, (float *)&temperature, (float *)&humidity);
if (res != 0)
{
(void)stcc4_basic_deinit();
return 1;
}
/* output */
stcc4_interface_debug_print("stcc4: %d/%d.\n", (uint32_t)(i + 1), (uint32_t)times);
stcc4_interface_debug_print("stcc4: co2 is %02dppm.\n", co2_ppm);
stcc4_interface_debug_print("stcc4: temperature is %0.2fC.\n", temperature);
stcc4_interface_debug_print("stcc4: humidity is %0.2f%%.\n", humidity);
...
}
...
/* basic deinit */
(void)stcc4_basic_deinit();
return 0;#include "driver_stcc4_shot.h"
uint8_t res;
uint32_t i;
uint32_t times = 3;
int16_t co2_ppm;
float temperature;
float humidity;
/* shot init */
res = stcc4_shot_init(STCC4_ADDRESS_0);
if (res != 0)
{
return 1;
}
...
/* loop */
for (i = 0; i < times; i++)
{
/* delay 5000ms */
stcc4_interface_delay_ms(5000);
/* read data */
res = stcc4_shot_read((int16_t *)&co2_ppm, (float *)&temperature, (float *)&humidity);
if (res != 0)
{
(void)stcc4_shot_deinit();
return 1;
}
/* output */
stcc4_interface_debug_print("stcc4: %d/%d.\n", (uint32_t)(i + 1), (uint32_t)times);
stcc4_interface_debug_print("stcc4: co2 is %02dppm.\n", co2_ppm);
stcc4_interface_debug_print("stcc4: temperature is %0.2fC.\n", temperature);
stcc4_interface_debug_print("stcc4: humidity is %0.2f%%.\n", humidity);
...
}
...
/* shot deinit */
(void)stcc4_shot_deinit();
return 0;Online documents: https://www.libdriver.com/docs/stcc4/index.html.
Offline documents: /doc/html/index.html.
Please refer to CONTRIBUTING.md.
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