Versão 3.0

.gitignore

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+MedidorComunicador/build/**
+MedidorControlador/build/**

MedidorComunicador/.vscode/arduino.json

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+{
+    "sketch": "MedidorComunicador.ino",
+    "board": "esp8266:esp8266:nodemcu",
+    "configuration": "CpuFrequency=80,UploadSpeed=115200,FlashSize=4M3M",
+    "output": "./build",
+    "port": "COM4"
+}

MedidorComunicador/.vscode/c_cpp_properties.json

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+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "C:\\Users\\DB1\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\2.3.0\\cores\\esp8266"
+            ],
+            "browse": {
+                "limitSymbolsToIncludedHeaders": false,
+                "path": [
+                    "C:\\Users\\DB1\\AppData\\Local\\Arduino15\\packages\\esp8266\\hardware\\esp8266\\2.3.0\\cores\\esp8266",
+                    "${workspaceRoot}"
+                ]
+            },
+            "intelliSenseMode": "msvc-x64"
+        }
+    ],
+    "version": 2
+}

MedidorComunicador/MedidorComunicador.ino

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+#include <ESP8266HTTPClient.h>
+
+#include <ESP8266WiFi.h>
+
+String inputString;
+const char* ssid = "FAST3184-567C";
+const char* password = "LCNTJVJV1WHQ";
+const int LED_BLOQUEADO = 0;
+const int LED_LIBERADO = 2;
+HTTPClient http;
+int areaSelecionada = -1;
+int votoSelecionado = -1;
+
+void bloquearMedidor(boolean pbBloquear){
+  digitalWrite(LED_BLOQUEADO, pbBloquear);
+  digitalWrite(LED_LIBERADO, !pbBloquear);
+}
+
+void limparVariaveis(){
+  inputString.remove(0);
+  inputString.trim();
+}
+
+void setup() {
+  pinMode(LED_BLOQUEADO, OUTPUT);
+  pinMode(LED_LIBERADO, OUTPUT);
+  Serial.begin(115200);
+  bloquearMedidor(true);
+  WiFi.begin(ssid, password);
+  while(WiFi.status() != WL_CONNECTED){
+    delay(1000);
+    Serial.println("Conectando...");
+  }
+  bloquearMedidor(false);
+}
+
+void loop() {
+  if (Serial.available()){
+    char inChar=(char)Serial.read();
+    inputString+=inChar;
+    if (inChar == '&'){
+      if(inputString.lastIndexOf("I") >= 0){
+        carregarDadosAreas();
+        delay(1000);
+        limparVariaveis();
+      } else if (inputString.lastIndexOf("A") >= 0) {
+        areaSelecionada = inputString.substring(1).toInt();
+        limparVariaveis();
+      } else if (inputString.lastIndexOf("V") >= 0) {
+        votoSelecionado = inputString.substring(1).toInt();
+        limparVariaveis();
+      }
+    }
+  }
+  if((areaSelecionada >=0) && (votoSelecionado > 0)){
+        gravarDadosVoto();
+        areaSelecionada = -1;
+        votoSelecionado = -1;   
+  }
+  delay(100);
+}
+
+void carregarDadosAreas(){
+  bloquearMedidor(true);
+  http.begin("http://jsonplaceholder.typicode.com/users/1");
+  int httpCode = http.GET();
+  String payload = http.getString();
+  Serial.println(payload);
+  bloquearMedidor(false);
+}
+
+void gravarDadosVoto(){
+  bloquearMedidor(true);
+  Serial.println("Gravando dados...");
+  bloquearMedidor(false);
+}

MedidorControlador/.vscode/arduino.json

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+{
+    "sketch": "MedidorControlador.ino",
+    "board": "arduino:avr:nano",
+    "configuration": "cpu=atmega328",
+    "output": "./build",
+    "port": "COM4"
+}

MedidorControlador/.vscode/c_cpp_properties.json

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+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "C:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino"
+            ],
+            "browse": {
+                "limitSymbolsToIncludedHeaders": false,
+                "path": [
+                    "C:\\Program Files (x86)\\Arduino\\hardware\\arduino\\avr\\cores\\arduino",
+                    "${workspaceRoot}"
+                ]
+            },
+            "intelliSenseMode": "msvc-x64"
+        }
+    ],
+    "version": 2
+}

MedidorControlador/MedidorControlador.ino

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+bool bProcessando = false;
+void setup()
+{
+  Serial.begin(115200);
+}
+
+void loop()
+{
+  if(!bProcessando){
+  digitalWrite(13, !digitalRead(13));
+  delay(2000);	
+  }
+}
+
+void serialEvent(){
+  char inChar=(char)Serial.read();
+  Serial.println(inChar);
+  bProcessando = inChar=='1';
+  Serial.println(bProcessando);
+}