vany5921
Published © MIT

M5Stack synchronizing the colors with Unity

I tried to communicate with Unity-M5Stack via WebSocket. M5Stack is a gadget with a built-in ESP32 module that enables WiFi commun

IntermediateProtip3 hours5
M5Stack synchronizing the colors with Unity

Things used in this project

Hardware components

ESP32 Basic Core IoT Development Kit
M5Stack ESP32 Basic Core IoT Development Kit
×1

Software apps and online services

Unity
Unity

Story

Read more

Code

m5stack_unity_color_sync.ino

C/C++
#include <WiFi.h>
#include <WebSocketsClient.h>
#include <ArduinoJson.h>
#include <M5Stack.h>
#include <map>
#include "config.h"

WebSocketsClient webSocket;
DynamicJsonDocument doc(1024);

std::map<std::string, uint32_t> colorMap{
    {"red", RED},
    {"green", GREEN},
    {"blue", BLUE}
};

std::string parseReceivedJson(uint8_t *payload)
{
  char *json = (char *)payload;
  DeserializationError error = deserializeJson(doc, json);
  
  if (error) {
    Serial.print(F("deserializeJson() failed: "));
    Serial.println(error.c_str());
    return "none";
  }

  JsonObject obj = doc.as<JsonObject>();

  // You can use a String to get an element of a JsonObject
  // No duplication is done.
  return obj[String("color")];
}

void syncColor(uint8_t *payload)
{
  std::string color = parseReceivedJson(payload);

  Serial.printf("color: %s\n", color.c_str());
  //M5.Lcd.fillRect(60, 20, 200, 200, colorMap[color]);
  M5.Lcd.fillScreen(colorMap[color]);
}

void webSocketEvent(WStype_t type, uint8_t * payload, size_t length) {

	switch(type) {
		case WStype_DISCONNECTED:
			Serial.printf("[WSc] Disconnected!\n");
			break;
		case WStype_CONNECTED:
			Serial.printf("[WSc] Connected to url: %s\n", payload);
			//webSocket.sendTXT("Connected");
			break;
		case WStype_TEXT:
			Serial.printf("[WSc] get text: %s\n", payload);
      syncColor(payload);
			break;
		case WStype_BIN:
		case WStype_ERROR:			
		case WStype_FRAGMENT_TEXT_START:
		case WStype_FRAGMENT_BIN_START:
		case WStype_FRAGMENT:
		case WStype_FRAGMENT_FIN:
			break;
	}
}

void setupWiFi()
{
  WiFi.begin(ssid, passwd);

  // Wait some time to connect to wifi
  for(int i = 0; i < 10 && WiFi.status() != WL_CONNECTED; i++) {
      Serial.print(".");
      delay(1000);
  }

  // Check if connected to wifi
  if(WiFi.status() != WL_CONNECTED) {
      Serial.println("No Wifi!");
      return;
  }

  Serial.println("Connected to Wifi, Connecting to server.");
	// server address, port and URL
	webSocket.begin("192.168.10.11", 8080, "/");

	// event handler
	webSocket.onEvent(webSocketEvent);

	// use HTTP Basic Authorization this is optional remove if not needed
	//webSocket.setAuthorization("user", "Password");

	// try ever 5000 again if connection has failed
	webSocket.setReconnectInterval(5000);
}

void setup()
{
  Serial.begin(115200);
  // Power ON Stabilizing...
  delay(500);
  M5.begin();

  setupWiFi();
  M5.Lcd.fillScreen(BLACK);
  M5.Lcd.setTextColor(GREEN);
  M5.Lcd.setTextSize(2);
}

void loop() {
  bool isPressedBtnA = false;
  bool isPressedBtnB = false;
  bool isPressedBtnC = false;
  if(M5.BtnA.wasPressed() || M5.BtnA.isPressed())
  {
    isPressedBtnA = true;
  }
  if(M5.BtnB.wasPressed() || M5.BtnB.isPressed())
  {
    isPressedBtnB = true;
  }
  if(M5.BtnC.wasPressed() || M5.BtnC.isPressed())
  {
    isPressedBtnC = true;
  }

  static uint32_t pre_send_time = 0;
  uint32_t time = millis();
  if(time - pre_send_time > 100){
    pre_send_time = time;
    String isPressedBtnAStr = (isPressedBtnA ? "true": "false");
    String isPressedBtnBStr = (isPressedBtnB ? "true": "false");
    String isPressedBtnCStr = (isPressedBtnC ? "true": "false");
    String btn_str = "{\"red\":" + isPressedBtnAStr + 
      ", \"green\":" + isPressedBtnBStr + 
      ", \"blue\":" + isPressedBtnCStr + "}";
    //Serial.println(btn_str);
    webSocket.sendTXT(btn_str);
  }
  webSocket.loop();

  M5.update();
}

Credits

katsushun89

Posted by vany5921

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