SYNC_FIRST mode

code/espurna/config/types.h

@@ -85,6 +85,7 @@
 #define RELAY_SYNC_NONE_OR_ONE      1
 #define RELAY_SYNC_ONE              2
 #define RELAY_SYNC_SAME             3
+#define RELAY_SYNC_FIRST            4
 
 #define RELAY_PULSE_NONE            0
 #define RELAY_PULSE_OFF             1

code/espurna/relay.ino

@@ -372,6 +372,14 @@ void relaySync(unsigned char id) {
             if (i != id) relayStatus(i, status);
         }
 
+    // If RELAY_SYNC_FIRST all relays should have the same state as first if first changes
+    } else if (relaySync == RELAY_SYNC_FIRST) {
+        if (id == 0) {
+            for (unsigned short i=1; i<_relays.size(); i++) {
+                relayStatus(i, status);
+            }
+        }
+
     // If NONE_OR_ONE or ONE and setting ON we should set OFF all the others
     } else if (status) {
         if (relaySync != RELAY_SYNC_ANY) {

code/html/index.html

@@ -430,6 +430,7 @@
                                         <option value="1">Zero or one switches active</option>
                                         <option value="2">One and just one switch active</option>
                                         <option value="3">All synchronised</option>
+                                        <option value="4">Switch #0 controls other switches</option>
                                     </select>
                                     <div class="pure-u-0 pure-u-lg-1-4"></div>
                                     <div class="pure-u-1 pure-u-lg-3-4 hint">Define how the different switches should be synchronized.</div>