[P162] Add Send data on change option

src/_P162_MCP42xxx.ino

@@ -6,6 +6,7 @@
 // #######################################################################################################
 
 /** Changelog:
+ * 2024-04-16 tonhuisman: Add Send values on change option, so Interval can be set to 0, and the data will be sent when changed
  * 2024-04-10 tonhuisman: Initial version. Support for Digipot MCP42xxx (dual channel) and MCP41xxx (single channel).
  *                        No support for daisy-chaining (MCP42xxx can do that, but not implemented)
  *                        RST and SHDN pins are not available on all boards, so should be set to none when not available.
@@ -91,6 +92,8 @@ boolean Plugin_162(uint8_t function, struct EventStruct *event, String& string)
       addFormNumericBox(F("Value at Shutdown"), F("shd"), P162_SHUTDOWN_VALUE, -1, 256);
       addUnit(F("-1..256"));
 
+      addFormCheckBox(F("Send values on change"), F("chg"), P162_CHANGED_EVENTS);
+
       success = true;
       break;
     }
@@ -102,6 +105,7 @@ boolean Plugin_162(uint8_t function, struct EventStruct *event, String& string)
       P162_SHUTDOWN_W0    = isFormItemChecked(F("sw0"));
       P162_SHUTDOWN_W1    = isFormItemChecked(F("sw1"));
       P162_SHUTDOWN_VALUE = getFormItemInt(F("shd"));
+      P162_CHANGED_EVENTS = isFormItemChecked(F("chg"));
 
       success = true;
       break;

src/src/PluginStructs/P162_data_struct.cpp

@@ -179,9 +179,16 @@ void P162_data_struct::write_pot(uint8_t cmd,
  * Set current values to UserVar
  ********************************************************************************/
 void P162_data_struct::updateUserVars(struct EventStruct *event) {
+  const int16_t pot0_old = UserVar.getFloat(event->TaskIndex, 0, true);
+  const int16_t pot1_old = UserVar.getFloat(event->TaskIndex, 1, true);
+
   UserVar.setFloat(event->TaskIndex, 0, _pot0_value);
   UserVar.setFloat(event->TaskIndex, 1, _pot1_value);
 
+  if (P162_CHANGED_EVENTS && ((pot0_old != _pot0_value) || (pot1_old != _pot1_value))) {
+    sendData(event);
+  }
+
   if (loglevelActiveFor(LOG_LEVEL_INFO)) {
     addLog(LOG_LEVEL_INFO, strformat(F("Digipot: W0 = %d, W1 = %d"), _pot0_value, _pot1_value));
   }

src/src/PluginStructs/P162_data_struct.h

@@ -13,6 +13,7 @@
 # define P162_SHUTDOWN_W0       PCONFIG(2)
 # define P162_SHUTDOWN_W1       PCONFIG(3)
 # define P162_SHUTDOWN_VALUE    PCONFIG(4)
+# define P162_CHANGED_EVENTS    PCONFIG(5)
 
 // # define P162_REMOVALVALUE      PCONFIG_LONG(0)
 // # define P162_REMOVALTIMEOUT    PCONFIG_LONG(1)