TINKER PIEDESIGN IN INDIA

Gas leak detector

An MQ-2 sensor: the bar graph rises with gas or smoke, and it beeps above 60 %.

Sensor projectsMQ-2graph

Open in TinkerPie Studio

What you need

Wiring

MQ-2: AO → P10, VCC → 5 V, GND → GND. Let it warm up for a minute.

Step by step

  1. Open Gas leak detector in TinkerPie Studio. It opens as blocks.
  2. Wire it: MQ-2: AO → P10, VCC → 5 V, GND → GND. Let it warm up for a minute.
  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 gas;

basic.forever(function () {
  gas = sensors.gasMQ2(Pin.P10);
  led.plotBarGraph(gas, 100);
  serial.writeValue('gas', gas);
  if (gas > 60) {
    music.playTone(2000, 100);
    serial.writeLine('Gas!');
  }
  basic.pause(300);
});
Arduino C++ (TinkerPie library)
// Gas leak detector
// 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 gas = 0;

void setup() {
  tinkerpie::begin();
  basic::forever([]() {
    gas = sensors::gasMQ2(Pin::P10);
    led::plotBarGraph(gas, 100);
    serial::writeValue("gas", gas);
    if (gas > 60) {
      music::playTone(2000, 100);
      serial::writeLine("Gas!");
    }
    basic::pause(300);
  });
}

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

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