====== IanalogWrite2() ======

''IanalogWrite2()'' converts a user integer value to the 4~20mA output range.

{{:en-us_commands:reference:ianalogwrite2.svg?900|IanalogWrite2 command operation flow}}

''void IanalogWrite2(uint8_t ch, int32_t min, int32_t max, int32_t value)''

===== Commands =====

^ Command ^ Arguments ^ Return Value ^ Operation ^
| ''IanalogWrite2(ch, min, max, value)'' | ''uint8_t ch''\\ ''int32_t min''\\ ''int32_t max''\\ ''int32_t value'' | ''void'' | Converts a user integer value to the 4~20mA output range. |


===== Example =====

<code cpp>
void setup() {
  Serial.begin(115200);
}

void loop() {
  uint16_t raw2 = analogRead2(0);  // Read the 4–20mA-adjusted input value of the specified channel.
  int32_t filtered2 = analogRead2Avg(0, 5);  // Return the integer average of 4–20mA input values.
  float filtered2f = analogRead2Avgf(0, 5);  // Return the floating-point average of 4–20mA input values.
  float currentmA = IanalogRead2f(0, 4.0F, 20.0F);  // Map the 4–20mA input value to the specified floating-point range.

  if (raw2 == ANALOG_READ2_ERROR || filtered2 == ANALOG_READ2_AVG_ERROR ||
      filtered2f == (float)ANALOG_READ2_AVG_ERROR ||
      currentmA == (float)ANALOG_READ2_ERROR) {
    Serial.println("4-20mA input error");
    delay(500);
    return;
  }

  int32_t percent = Iscale((int32_t)raw2, 0, 32767, 0, 100);  // Map an integer input to the specified integer range.

  IanalogWrite2(0, 0, 100, 50);       // 50% → approx. 12mA
  IanalogWrite2f(1, 0.0F, 10.0F, 2.5F); // 25% → approx. 8mA

  Serial.print("4-20mA raw: ");
  Serial.println(raw2);
  Serial.print("4-20mA filtered: ");
  Serial.println(filtered2);
  Serial.print("4-20mA filtered float: ");
  Serial.println(filtered2f, 2);
  Serial.print("percent: ");
  Serial.println(percent);
  Serial.print("current: ");
  Serial.println(currentmA, 2);

  delay(500);
}
</code>

===== Precautions =====

  * Match the module DIP switches, external power supply and output range.
  * Do not configure these together with PWM functions sharing the same timer.
  * Do not output values to uninitialized channels.
  * Currently, MPAINO Y analog output supports channels up to ''0~11''; do not use ''12~15''.
  * ''analogWriteInit()'', ''analogWriteFreq()'' and ''analogWriteMax()'' are for Y analog output channels and must not be used for high-speed pulse channels ''20~31''.
  * Do not use high-speed pulse GPIO numbers ''130~141'' with ''analogWrite()''.

===== Built-in Commands in the Same Category =====

  * [[:en-us_commands:reference:analogwrite2|analogWrite2() View detailed description]]
  * [[:en-us_commands:reference:ianalogwrite2f|IanalogWrite2f() View detailed description]]

[[:en-us_commands:builtin|← Built-in Command List]]