20. Two Channels Tracking Module(EF05019)#

20.1. Introduction#

The two channels Tracking Module has integrated two groups of reflective infrared pair diode, which can be used to make line tracking smart cars.

../_images/05019_01.png

20.3. Characteristic#

Designed in RJ11 connections, easy to plug.

20.4. Specification#

Item Parameter
SKU EF05019
Connection RJ11
Type of Connection Digital output
Working Voltage 3.3V
Effective Distance 2~12mm
Black Line Low level output
White Line High level output

20.5. Outlook#

../_images/05019_02.png

20.6. Quick to Start#

20.6.1. Materials Required and Diagram#

Connect the Two channels tracking module to J1 port in the Nezha expansion board as the picture shows.

../_images/05019_03.png

20.7. MakeCode Programming#

20.7.1. Step 1#

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

../_images/05001_04.png

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.

../_images/05001_05.png

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.

20.7.2. Step 2#

20.7.3. Code as below:#

../_images/05019_06.png

20.7.5. Result#

Different icons display on the micro:bit in accordance with the different status detected by the tracking module.

20.8. Python Programming#

20.8.1. Step 1#

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor

../_images/05001_072.png

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

../_images/05001_081.png ../_images/05001_091.png ../_images/05019_10.png

20.8.2. Step 2#

20.8.3. Reference#

from microbit import *
from enum import *
from tracking import *

tracking = TRACKING(J1)
while True:
    if tracking.get_state() == 11:
        display.show(Image.YES)
    elif tracking.get_state() == 10:
        display.show(Image.SAD)
    elif tracking.get_state() == 00:
        display.show(Image.NO)
    elif tracking.get_state() == 01:
        display.show(Image.HAPPY)

20.8.4. Result#

Different icons display on the micro:bit in accordance with the different status detected by the tracking module.

20.9. Relevant File#

20.10. Technique File#