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