IOXESP32-4-20mA.ino

#include <Arduino.h>
#include <Wire.h>
#include <IOXESP32_4-20mA_Receiver.h>

Receiver4_20 sensor(&Wire, 0x45); // Default 0x45

void setup() {
  Serial.begin(115200);

  Wire.begin(); // Start I2C
  while (!sensor.begin()) { // Start ADC
    Serial.println("Not found hardware :(");
    delay(2000);
  }
}

void loop() {
  delay(100);
  if (sensor.measure()) { // Update analog value from ADC
    int16_t raw = sensor.raw(); // Read raw value (-32768 to 32767)
    float current = sensor.current(); // Read current in mA unit
    float percent = (current - 4.0) * 100.0 / (20.0 - 4.0);
    if (percent < 0) percent = 0;
    if (percent > 100) percent = 100;
    Serial.printf("Raw=%5d   Current=%.02f mA     Percent=%.02f%%\n", raw, current, percent);
  } else {
    Serial.println("Hardware error !");
  }
}