Unit Kmeter-ISO Arduino チュートリアル

#include <M5Unified.h>
#include "M5UnitKmeterISO.h"

M5UnitKmeterISO kmeter;
auto& lcd = M5.Display;
uint8_t error_status = 0;
long delay_time = 0;

void setup()
{
    M5.begin();
    M5.Display.setFont(&fonts::lgfxJapanMinchoP_20);
    M5.Display.setTextColor(YELLOW); 
    M5.Display.setTextSize(1);
    auto pin_num_sda = M5.getPin(m5::pin_name_t::port_a_sda);
    auto pin_num_scl = M5.getPin(m5::pin_name_t::port_a_scl);
    M5_LOGI("getPin: SDA:%u SCL:%u", pin_num_sda, pin_num_scl);
    Wire.begin(pin_num_sda, pin_num_scl, 400000U);
    
    M5.Display.setCursor(0, 0);
    M5.Display.clear();
    
    Serial.begin(115200);
    while (!kmeter.begin(&Wire, KMETER_DEFAULT_ADDR, pin_num_sda, pin_num_scl, 100000L)) {
        Serial.println("Unit KmeterISO not found");
    }
}

void loop()
{
    M5.update();
    
    M5.Display.clear();
    // Serial.println("ok");
    if (millis() > delay_time) {
      M5.Display.setCursor(0, 0);
        error_status = kmeter.getReadyStatus();
        
        if (error_status == 0) {
            
            M5.Display.printf("Celsius Temp:  %.2fC\r\n",
                          ((float)(kmeter.getCelsiusTempValue())) / 100);
            M5.Display.printf("Fahrenheit Temp:  %.2fF\r\n",
                          ((float)(kmeter.getFahrenheitTempValue())) / 100);
            M5.Display.printf(
                "Chip Celsius Temp:  %.2fC\r\n",
                ((float)(kmeter.getInternalCelsiusTempValue())) / 100);
            M5.Display.printf(
                "Chip Fahrenheit Temp:  %.2fF\r\n",
                ((float)(kmeter.getInternalFahrenheitTempValue())) / 100); 
        } else {
            M5.Display.print(kmeter.getReadyStatus());
        }
        
    }
    delay(1000);
}