The first reading

/*
  Infrared Receiver - first reading                     TK64 / /p/tk64

  Wiring. Count from the square pad on the TinkerBlock board, parts
  up, header at the bottom:

    GND    -> GND
    VCC    -> 3V3 on an ESP32, ESP32-S3 or Pico; 5V on an Uno.
              Your board's logic voltage: strong infrared takes
              SIGNAL to about VCC - 0.4 V.
    NC     -> nothing   (unconnected on the board)
    SIGNAL -> GPIO 4 on an ESP32-S3, GPIO 34 on an ESP32,
              A0 on an Uno, GP26 on a Raspberry Pi Pico

  Arduino IDE
    Tools > Board                 your board, e.g. ESP32S3 Dev Module
    Tools > Port                  the one that appears when you plug in
    Tools > USB CDC On Boot       Enabled   (ESP32-S3 only)
    No library needed.
*/

// The analog pin SIGNAL is wired to.
// Uno: A0. ESP32: 34. ESP32-S3: 4. Pico: 26.
const int IR_PIN = 4;

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

void loop() {
  // The mean of 16 reads, to steady the number.
  long sum = 0;
  for (int i = 0; i < 16; i++) {
    sum += analogRead(IR_PIN);     // more infrared, higher
  }
  Serial.println(sum / 16);
  delay(200);
}

"""
  Infrared Receiver - first reading, MicroPython       TK64 / /p/tk64

  Wiring. Count from the square pad on the TinkerBlock board, parts
  up, header at the bottom:

    GND    -> GND
    VCC    -> 3V3   (never 5V: strong infrared takes SIGNAL to
              about VCC - 0.4 V)
    NC     -> nothing   (unconnected on the board)
    SIGNAL -> GPIO 4 on an ESP32-S3, GPIO 34 on an ESP32,
              GP26 on a Raspberry Pi Pico

  Thonny
    Run > Configure interpreter   MicroPython (ESP32) or
                                  MicroPython (Raspberry Pi Pico)
    Save it to the board as main.py to run it on every power-up.
    Nothing to install: machine, sys and time are built in.
"""

import sys
import time
from machine import ADC, Pin

# The GPIO number SIGNAL is wired to. ESP32: 34. ESP32-S3: 4. Pico: 26.
IR_PIN = 4

adc = ADC(Pin(IR_PIN))
if sys.platform == "esp32":           # ESP32 and ESP32-S3
    adc.atten(ADC.ATTN_11DB)          # the full range, to about 3.1 V

while True:
    total = 0
    for _ in range(16):               # the mean of 16 reads
        total += adc.read_u16()       # more infrared, higher
    print(total // 16)
    time.sleep_ms(200)