add function that gets called before homie initialization

things/things.ino

@@ -20,6 +20,7 @@ void loopHandler() {
 }
 
 void setup() {
+  hardwareSetup();
   Homie.setFirmware(FWNAME, FWVERSION);
   for (int i = 0; i < sizeof(devices) / sizeof(*devices); i++) {
     devices[i]->deviceRegister();