for real powermeter

libraries/ESP8266TimerInterrupt/examples/multiFileProject/multiFileProject.ino

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+/****************************************************************************************************************************
+  multiFileProject.ino
+  For ESP8266 boards
+  Written by Khoi Hoang
+
+  Built by Khoi Hoang https://github.com/khoih-prog/ESP8266TimerInterrupt
+  Licensed under MIT license
+*****************************************************************************************************************************/
+
+// To demo how to include files in multi-file Projects
+
+#ifndef ESP8266
+  #error This code is designed to run on ESP8266 platform! Please check your Tools->Board setting.
+#endif
+
+#define ESP8266_TIMER_INTERRUPT_VERSION_MIN_TARGET      "ESP8266TimerInterrupt v1.6.0"
+#define ESP8266_TIMER_INTERRUPT_VERSION_MIN             1006000
+
+#include "multiFileProject.h"
+
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
+#include "ESP8266TimerInterrupt.h"
+#include "ESP8266_ISR_Timer.h"
+
+
+void setup() 
+{
+  Serial.begin(115200);
+  while (!Serial);
+  
+  Serial.println("\nStart multiFileProject");
+  Serial.println(ESP8266_TIMER_INTERRUPT_VERSION);
+
+#if defined(ESP8266_TIMER_INTERRUPT_VERSION_MIN)
+  if (ESP8266_TIMER_INTERRUPT_VERSION_INT < ESP8266_TIMER_INTERRUPT_VERSION_MIN)
+  {
+    Serial.print("Warning. Must use this example on Version equal or later than : ");
+    Serial.println(ESP8266_TIMER_INTERRUPT_VERSION_MIN_TARGET);
+  }
+#endif
+}
+
+void loop() 
+{
+  // put your main code here, to run repeatedly:
+}