Use 32bits rather than 64 bits as arm7l is 32 bits only.

coupler/opc-ua-server/server.c

@@ -228,22 +228,22 @@ int main(int argc, char **argv)
     #endif
 
     // enable keep-alive
-    UA_Int64  defaultInt64 = 0;
-    UA_Int64  couplerID = atoi(arguments.id);
+    UA_Int32  defaultInt32 = 0;
+    UA_Int32  couplerID = atoi(arguments.id);
     const PublishedVariable publishedVariableArray[] = {
         // representing time in millis since start of process
         {
             .name = "heart_beat",
             .description = "Heart beat",
-            .pdefaultValue = &defaultInt64,
-            .type = UA_TYPES[UA_TYPES_INT64]
+            .pdefaultValue = &defaultInt32,
+            .type = UA_TYPES[UA_TYPES_INT32]
         },
         // representing the ID of the coupler
         {
             .name = "id",
             .description = "ID",
             .pdefaultValue = &couplerID,
-            .type = UA_TYPES[UA_TYPES_INT64]
+            .type = UA_TYPES[UA_TYPES_INT32]
         }
     };
 

coupler/opc-ua-server/server_subscribe.c

@@ -28,10 +28,10 @@ static void dataChangeNotificationCallback(UA_Server *server, UA_UInt32 monitore
                                void *monitoredItemContext, const UA_NodeId *nodeId,
                                void *nodeContext, UA_UInt32 attributeId,
                                const UA_DataValue *var) {
-    if(UA_Variant_hasScalarType(&var->value, &UA_TYPES[UA_TYPES_INT64])) {
+    if(UA_Variant_hasScalarType(&var->value, &UA_TYPES[UA_TYPES_INT32])) {
         UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND,
-                    "Received Notification with value %ld",
-                    *(UA_Int64*) var->value.data);
+                    "Received Notification with value %d",
+                    *(UA_Int32*) var->value.data);
     }
 }
 
@@ -221,17 +221,17 @@ static void fillTestDataSetMetaData(UA_DataSetMetaDataType *pMetaData) {
 
     /* heartbeat */
     UA_FieldMetaData_init (&pMetaData->fields[0]);
-    UA_NodeId_copy (&UA_TYPES[UA_TYPES_INT64].typeId,
+    UA_NodeId_copy (&UA_TYPES[UA_TYPES_INT32].typeId,
                     &pMetaData->fields[0].dataType);
-    pMetaData->fields[0].builtInType = UA_NS0ID_INT64;
+    pMetaData->fields[0].builtInType = UA_NS0ID_INT32;
     pMetaData->fields[0].name =  UA_STRING ("Heartbeat (subscribed)");
     pMetaData->fields[0].valueRank = -1; /* scalar */
 
     // ID
     UA_FieldMetaData_init (&pMetaData->fields[1]);
-    UA_NodeId_copy (&UA_TYPES[UA_TYPES_INT64].typeId,
+    UA_NodeId_copy (&UA_TYPES[UA_TYPES_INT32].typeId,
                     &pMetaData->fields[1].dataType);
-    pMetaData->fields[1].builtInType = UA_NS0ID_INT64;
+    pMetaData->fields[1].builtInType = UA_NS0ID_INT32;
     pMetaData->fields[1].name =  UA_STRING ("ID (subscribed)");
     pMetaData->fields[1].valueRank = -1; /* scalar */
 }