adding arduino project

ESP32-json-control/ESP32-json-control.ino

@@ -0,0 +1,114 @@
+
+// librarys
+#include <WiFi.h>
+#include <ArduinoJson.h>
+
+// network credentials
+const char* ssid = "<your SSID>";
+const char* password = "<your WiFi password>";
+
+// server port
+WiFiServer server(80);
+
+// HTTP request
+String header;
+
+// define pins
+int pinsout[] = {26, 27};
+int pinsout_length = 2;
+boolean pinsout_stat[2];
+
+int pinsin[] = {32, 33};
+int pinsin_length = 2;
+int pinsin_stat[2];
+
+// define timeout
+unsigned long currentTime = millis();
+unsigned long previousTime = 0;
+const long timeoutTime = 2000;
+
+void setup() {
+  Serial.begin(115200);
+
+  for (int i=0; i < pinsout_length; i++){
+    pinMode(pinsout[i], OUTPUT);
+    digitalWrite(pinsout[i], LOW);
+  }
+
+  // connect to Wi-Fi
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected.");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+  server.begin();
+}
+
+void loop(){
+  WiFiClient client = server.available();
+
+  if (client) {
+    currentTime = millis();
+    previousTime = currentTime;
+    Serial.println("New Client.");
+    String currentLine = "";
+    while (client.connected() && currentTime - previousTime <= timeoutTime) {
+      currentTime = millis();
+      if (client.available()) {
+        char c = client.read();
+        Serial.write(c);
+        header += c;
+        if (c == '\n') {
+          if (currentLine.length() == 0) {
+            client.println("HTTP/1.1 200 OK");
+            client.println("Content-type:application/json");
+            client.println("Connection: close");
+            client.println();
+
+            for (int i=0; i<pinsout_length; i++){
+              if (header.indexOf("GET /"+String(i)+"/on") >= 0){
+                digitalWrite(pinsout[i], HIGH);
+                pinsout_stat[i] = true;
+                break;
+              }else if (header.indexOf("GET /"+String(i)+"/off") >= 0){
+                digitalWrite(pinsout[i], LOW);
+                pinsout_stat[i] = false;
+                break;
+              }
+            }
+
+            client.print("{\"pinsout\":[");
+            for (int i=0; i<pinsout_length-1; i++){
+              client.print(String(pinsout_stat[i])+",");
+            }
+            client.print(pinsout_stat[pinsout_length]);
+            client.print("],\"pinsin\":[");
+            for (int i=0; i<pinsin_length-1; i++){
+              client.print(String(digitalRead(pinsin[i]))+",");
+            }
+            client.print(String(digitalRead(pinsin[pinsin_length])));
+            client.print("]}");
+
+            client.println();
+            break;
+          } else {
+            currentLine = "";
+          }
+        } else if (c != '\r') {
+          currentLine += c;
+        }
+      }
+    }
+    header = "";
+    client.stop();
+    Serial.println("Client disconnected.");
+    Serial.println("");
+  }
+}