Reply to Core2 with 4IN8OUT module in Arduino IDE on Sat, 07 Feb 2026 19:52:55 GMT

HalloWere — Sat, 07 Feb 2026 19:52:55 GMT

To anyone trying something similar in the future

MODULE_4IN8OUT module;
MFRC522_I2C mfrc522(0x28, -1, &Wire);

void setup() {
    M5.begin(true, true, true, true);
    Serial.begin(115200);
    
    delay(500);  
    
    Serial.println("Starting setup...");
    M5.Lcd.println("Init...");

    // POWER MANAGEMENT dla Port A (RFID)
    M5.Axp.SetBusPowerMode(0);
    M5.Axp.SetLDOEnable(2, true);
    delay(200);

    // --- I2C BUSES ---
    Wire.begin(32, 33, 100000);
    Wire1.begin(21, 22, 100000);
    delay(100);

    M5.Lcd.println("Init 4IN8OUT...");
    
    // Start module 4IN8OUT
    if (!module.begin(&Wire1, 21, 22, MODULE_4IN8OUT_ADDR)) {
        M5.Lcd.setTextColor(RED);
        M5.Lcd.println("4IN8OUT INIT FAIL");
        Serial.println("4IN8OUT INIT FAIL");
        while (1) delay(1000);
    }
    
    M5.Lcd.setTextColor(GREEN);
    M5.Lcd.println("4IN8OUT OK!");
    Serial.println("4IN8OUT OK!");
    M5.Lcd.setTextColor(WHITE);

    // Init RFID
    mfrc522.PCD_Init();
    M5.Lcd.println("RFID OK!");
    Serial.println("RFID OK!");