edit arduino code

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arduino/itender/itender.ino

@@ -1,39 +1,71 @@
 /**
 * Official proxy code for iTender GPIO Communication
 **/
-
 #include <ArduinoJson.h>
 
-const int BUFFER_SIZE = 256;
-char buffer[BUFFER_SIZE];
-int bufferIndex = 0;
+// Define the size of the JSON buffer
+#define JSON_BUFFER_SIZE 256
+
+// Create a JSON object for incoming messages
+StaticJsonDocument<JSON_BUFFER_SIZE> incomingJson;
+
+// Create a JSON object for outgoing messages
+DynamicJsonDocument<JSON_BUFFER_SIZE> outgoingJson;
 
 void setup() {
-  Serial.begin(115200);
+  // Initialize serial communication
+  Serial.begin(9600);
 }
 
+void(* resetFunc) (void) = 0; //declare reset function @ address 0
+
 void loop() {
-  if (Serial.available() > 0) {
-    char incomingByte = Serial.read();
-    buffer[bufferIndex] = incomingByte;
-    bufferIndex++;
+  // Wait for a new line on the serial console
+  if (Serial.available()) {
+    // Read the incoming JSON message
+    DeserializationError error = deserializeJson(incomingJson, Serial);
+    if (error) {
+      // Handle error
+    } else {
+      // Extract the "type" and "data" fields from the JSON object
+      String id = incomingJson["id"];
+      String type = incomingJson["type"];
+      JsonVariant data = incomingJson["data"];
 
-    if (incomingByte == '\n') {
-      buffer[bufferIndex] = '\0';
-      bufferIndex = 0;
+      // Create a nested object in the root object
+      JsonObject outgoingData = outgoingJson.to<JsonObject>().createNestedObject("data");
 
-      StaticJsonDocument<200> doc;
-      DeserializationError error = deserializeJson(doc, buffer);
-      if (error) {
-        Serial.print(F("deserializeJson() failed: "));
-        Serial.println(error.c_str());
-        return;
+       outgoingData["success"] = true;
+
+      // Handle the message based on the "type" field
+      switch (type) {
+        case "ACK":
+          // Handle ACK message
+          break;
+        case "SET_PIN":
+          // Handle SET_PIN message
+          break;
+        case "GET_VAL":
+          // Handle GET_VAL message
+          break;
+        case "GET_SENSOR":
+          // Handle GET_SENSOR message
+          break;
+        case "RESTART":
+          resetFunc();  //call reset
+          break;
+        default:
+          // Handle unknown message type
+          break;
       }
 
-      // Do something with the deserialized JSON object
-      int value = doc["value"];
-      Serial.println(value);
+      // Prepare the outgoing JSON message
+      outgoingJson["id"] = id;
+      outgoingJson["type"] = type;
+      outgoingJson["data"] = "";
+
+      // Send the outgoing JSON message
+      serializeJson(outgoingJson, Serial);
     }
   }
-}
-
+}