Hopefully Final Control Update...minus esp bug

Final/MQTTdigitalPot.ino

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+#include <M5StickCPlus2.h>  // Correct library header for M5StickC Plus2  // Include M5StickCPlus2 library
+#include <SPI.h>
+#include <WiFi.h>
+#include <PubSubClient.h>
+
+#define CS_PIN 32        // Chip Select (CS) for MCP4231
+#define SCK_PIN 33        
+#define MISO_PIN 25     
+#define MOSI_PIN 26        
+
+#define SPI_SPEED 1000000  // 1MHz SPI speed
+byte addressPot = B00000000;
+
+const char* ssid = "IOT-pecan";
+const char* password = "aaaaaaaa";
+const char* mqtt_server = "192.168.1.110";
+const char* topic = "jc/status/light:0";
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+void setPot(uint8_t value) {
+    digitalWrite(CS_PIN, LOW);  // Select MCP4231
+    SPI.transfer(addressPot);         // Command: Write to Wiper 0
+    SPI.transfer(value);        // Set wiper position (0-255)
+    digitalWrite(CS_PIN, HIGH); // Deselect MCP4231
+}
+
+void callback(char* topic, byte* payload, unsigned int length) {
+  char payloadStr[10];
+  if (length >= sizeof(payloadStr)) length = sizeof(payloadStr) - 1;
+  strncpy(payloadStr, (char*)payload, length);
+  payloadStr[length] = '\0';
+
+  int potValue = atoi(payloadStr);
+
+  setPot(potValue);
+  Serial.print("Wiper set to: ");
+  Serial.println(potValue);
+
+  // Display on the M5StickC Plus2 screen
+  M5.Lcd.fillScreen(TFT_BLACK);
+  M5.Lcd.setCursor(0, 20);
+  M5.Lcd.println("Output:");
+  M5.Lcd.print(potValue);
+
+}
+
+void setup() {
+  M5.begin();  // Initialize M5StickC Plus2
+  SPI.begin(SCK_PIN, MISO_PIN, MOSI_PIN, CS_PIN);  // SCK, MISO (not used), MOSI, CS
+  pinMode(CS_PIN, OUTPUT);
+  digitalWrite(CS_PIN, HIGH);
+
+  Serial.begin(115200);
+  Serial.println("MCP4231 Digital Potentiometer Test");
+
+  M5.Lcd.setRotation(0);
+  M5.Lcd.fillScreen(TFT_BLACK);
+  M5.Lcd.setTextColor(TFT_WHITE);
+  M5.Lcd.setTextSize(2.5);
+
+  // Set potentiometer to mid-range (127)
+  setPot(60);
+
+  WiFi.begin(ssid, password);
+  Serial.print("Connecting to WiFi");
+  unsigned long startTime = millis();
+  while (WiFi.status() != WL_CONNECTED && millis() - startTime < 10000) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  if (WiFi.status() == WL_CONNECTED) {
+    Serial.println("\nConnected to WiFi");
+  } else {
+    Serial.println("\nWiFi Connection Failed!");
+    return;
+  }
+
+  client.setServer(mqtt_server, 1883);
+  client.setCallback(callback);
+
+  while (!client.connected()) {
+    Serial.print("Connecting to MQTT...");
+    if (client.connect("M5StickCPlus2")) {
+      Serial.println("Connected!");
+      client.subscribe(topic);
+    } else {
+      Serial.print("Failed, rc=");
+      Serial.println(client.state());
+      delay(2000);
+    }
+  }
+}
+
+void reconnect() {
+    while (!client.connected()) {
+        Serial.print("Reconnecting to MQTT...");
+        if (client.connect("M5StickCPlus2")) {
+            Serial.println("Reconnected!");
+            client.subscribe(topic);
+        } else {
+            Serial.print("Failed, rc=");
+            Serial.println(client.state());
+            delay(5000); // Wait before retrying
+        }
+    }
+}
+
+void loop() {
+    if (!client.connected()) {
+        reconnect();  // Reconnect to MQTT if disconnected
+    }
+    client.loop();
+}
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