SHT30 external sensor

Budul · May 5, 2025, 5:05pm

Hi, i want to use external SHT30 humidity and temperature module like (Air temperature and humidity sensor SHT30 | LaskaKit) it is possible? I see support for SHT30 in SDK. thanks

hub.martin · May 15, 2025, 12:31pm

Hello,

yes, you can use SHT30. Our Clime Module driver has the autodetection because older climes had SHT20

github.com

hardwario/twr-sdk/blob/master/twr/src/twr_module_climate.c#L250


      
              if (event == TWR_SHT20_EVENT_UPDATE)
              {
                  _twr_module_climate.event_handler(TWR_MODULE_CLIMATE_EVENT_UPDATE_HYGROMETER, _twr_module_climate.event_param);
              }
              else if (event == TWR_SHT20_EVENT_ERROR)
              {
                  twr_tmp112_deinit(&_twr_module_climate.tmp112);
                  twr_sht20_deinit(&_twr_module_climate.sht._20);
          
                  _twr_module_climate.revision = TWR_MODULE_CLIMATE_REVISION_R2;
          
                  twr_sht30_init(&_twr_module_climate.sht._30, TWR_I2C_I2C0, 0x45);
                  twr_sht30_set_event_handler(&_twr_module_climate.sht._30, _twr_module_climate_sht30_event_handler, NULL);
                  twr_sht30_set_update_interval(&_twr_module_climate.sht._30, _twr_module_climate.update_interval.hygrometer);
          
                  _twr_module_climate.event_handler(TWR_MODULE_CLIMATE_EVENT_ERROR_HYGROMETER, _twr_module_climate.event_param);
              }
          }
          
          static void _twr_module_climate_sht30_event_handler(twr_sht30_t *self, twr_sht30_event_t event, void *event_param)
          {

So in your application you can include

#include <twr_sht30.h>

and initialize sensor with

twr_sht30_t sht30;

twr_sht30_init(&sht30, TWR_I2C_I2C0, 0x45);
twr_sht30_set_event_handler(&sht30, _twr_module_climate_sht30_event_handler, NULL);
twr_sht30_set_update_interval(&sht30, _twr_module_climate.update_interval.hygrometer);

Check if your sensor has I2C address 0x45 or change it accordingly.