text: /** \addtogroup RelayModule 
   *  @{
   */
  
  #ifndef RELAY_H
  #define RELAY_H
  
  #include "Switchable.h"
  
  //solenoid driver class:
  class Relay : public Switchable {
      public:
          Relay(const int pin);
  };
  
  #endif //RELAY_H
  
   /** @}*/