TINKER PIEDESIGN IN INDIA

Classroom noise meter

The microphone on the board: a bar graph of the noise, red over the limit.

Sensor projectssoundon-board

Open in TinkerPie Studio

What you need

Wiring

Nothing to connect: TinkerPie has a microphone on the board.

Step by step

  1. Open Classroom noise meter in TinkerPie Studio. It opens as blocks.
  2. Wire it: Nothing to connect: TinkerPie has a microphone on the board.
  3. Press Run to try it in the simulator. Use the sliders and buttons under the board picture to test it.
  4. Connect TinkerPie with a USB-C cable in Chrome or Edge, press Connect, then Download. Or, with Studio started from the TinkerPie launcher on your computer, open the Arduino C++ tab and press Build & Flash.
  5. Change something: a colour, a number, a sound. Then run it again.

The code

This is the program the blocks make. The same program runs in the simulator and on the board.

JavaScript
var noise;

basic.forever(function () {
  noise = input.soundLevel();
  if (noise > 70) {
    led.fill(Colors.Red);
  } else {
    led.plotBarGraph(noise, 70);
  }
  serial.writeValue('noise', noise);
  basic.pause(100);
});
Arduino C++ (TinkerPie library)
// Classroom noise meter
// Arduino C++ made by TinkerPie Studio from the blocks. Board: TinkerPie V1 (ESP32-S3).
// Arduino IDE: install the TinkerPie library (Studio menu > Arduino library), then Tools > Board > ESP32S3 Dev Module,
// USB CDC On Boot: Enabled, Flash Size: 16MB, Partition Scheme: 16M Flash (3MB APP/9.9MB FATFS), PSRAM: OPI PSRAM.
#include <TinkerPie.h>
using namespace tinkerpie;

double noise = 0;

void setup() {
  tinkerpie::begin();
  basic::forever([]() {
    noise = input::soundLevel();
    if (noise > 70) {
      led::fill(Colors::Red);
    } else {
      led::plotBarGraph(noise, 70);
    }
    serial::writeValue("noise", noise);
    basic::pause(100);
  });
}

void loop() {
  tinkerpie::loop();   // runs the forever blocks and handles events
}

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