9. Crash Sensor(EF05008)

9.1. Introduction

Crash Sensor is a sensor module based on crash components.

9.2. Products Link

ELECFREAKS PlanetX Crash Sensor

9.3. Characteristic

Designed in RJ11 connections, easy to plug.

9.4. Specification

Item | Parameter :-: | :-: SKU|EF05008 Connection|RJ11 Type of Connection|Digital output Working Voltage|3.3V

9.5. Outlook

9.6. Quick to Start

9.6.1. Materials Required and Diagram

Connect the Crash sensor to J1 port and the LED to J2 port in the Nezha expansion board as the picture shows.

9.7. MakeCode Programming

9.7.1. Step 1

Click “Advanced” in the MakeCode drawer to see more choices.

We need to add a package for programming, . Click “Extensions” in the bottom of the drawer and search with “PlanetX” in the dialogue box to download it.

Note: If you met a tip indicating that the codebase will be deleted due to incompatibility, you may continue as the tips say or build a new project in the menu.

9.7.2. Step 2

9.7.3. Code as below:

9.7.4. Link

Link: https://makecode.microbit.org/_Wj9bvpfFm4YK

You may also download it directly below:

9.7.5. Result

The LED lights on if the crash switch was pressed or it lights off.

9.8. Python Programming

9.8.1. Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor

We need to add enum.py and crash.py for programming. Click “Load/Save” and then click “Show Files (1)” to see more choices, click “Add file” to add enum.py and crash.py from the unzipped package of PlanetX_MicroPython.

9.8.2. Step 2

9.8.3. Reference

from microbit import *
from enum import *
from crash import *
crash = CRASH(J1)

while True:
    button = crash.crash_is_pressed()
    if(button == True):
        display.show(Image.HAPPY)
    else:
        display.show(Image.SAD)

9.8.4. Result

A smile face displays on the micro:bit while the crash switch being pressed or the micro:bit displays a sad face.

9.9. Relevant File

9.10. Technique File