diff --git a/src/waterlevel/waterlevel.cxx b/src/waterlevel/waterlevel.cxx index ce3991d9..8a060196 100644 --- a/src/waterlevel/waterlevel.cxx +++ b/src/waterlevel/waterlevel.cxx @@ -22,13 +22,20 @@ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +#include +#include #include "waterlevel.h" using namespace upm; WaterLevel::WaterLevel(int pin) { - m_gpio = mraa_gpio_init(pin); + if ( !(m_gpio = mraa_gpio_init(pin)) ) + { + throw std::invalid_argument(std::string(__FUNCTION__) + + ": mraa_gpio_init() failed, invalid pin?"); + return; + } mraa_gpio_dir(m_gpio, MRAA_GPIO_IN); }