void setup() {
  Serial.begin(115200);
  pinMode(A2, INPUT);
}

void loop() {
  static int adw_alt = -42, adw;
  static float U, Temp;  

  adw = analogRead(A2); 
  if( abs( adw_alt - adw ) > 3 ) 
  {
    U = 5.0 * adw / 1.023 ; 
    Temp = (U - 500) / 10.0 ; 
    adw_alt = adw; 

    Serial.print("ADW = " + String( adw ) + ": ");
    Serial.print( U, 1 ); 
    Serial.print(" mV = " );
    Serial.print( Temp, 1 );
    Serial.println( "°C ") ; 
    delay(100);
  }

}


custom-chip-TMP36.ino

diagram.json

tmp36

tmp36a.chip.json

// Wokwi Custom Chip - For information and examples see:
// https://link.wokwi.com/custom-chips-alpha
//
// SPDX-License-Identifier: MIT
// Copyright (C) 2022 Uri Shaked / wokwi.com

#include "wokwi-api.h"
#include <stdio.h>
#include <stdlib.h>

typedef struct {
  pin_t pin_out;
  uint32_t temperature_attr;
} chip_state_t;

static void chip_timer_event(void *user_data);

void chip_init(void) {
  chip_state_t *chip = malloc(sizeof(chip_state_t));
  chip->pin_out = pin_init("OUT", ANALOG);
  chip->temperature_attr = attr_init_float("temperature", 25.0);

  const timer_config_t timer_config = {
    .callback = chip_timer_event,
    .user_data = chip,
  };
  timer_t timer_id = timer_init(&timer_config);
  timer_start(timer_id, 42, true);

  printf("TMP36 lebt!\n");
}

void chip_timer_event(void *user_data) {
  chip_state_t *chip = (chip_state_t*)user_data;
  float voltage = 0.01 * (attr_read_float(chip->temperature_attr) + 50);
  pin_dac_write(chip->pin_out, voltage);
}