# Two Channels Tracking Module(EF05019) ## 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) ## Products Link [ELECFREAKS PlanetX PIR Sensor](https://shop.elecfreaks.com/products/elecfreaks-planetx-tracking-sensor?_pos=1&_sid=abccc8307&_ss=r) ## Characteristic Designed in RJ11 connections, easy to plug. ## Specification Item | Parameter :-: | :-: SKU|EF05019 Connection|RJ11 Type of Connection|Digital output Working Voltage|3.3V Effective Distance|8~11mm Black Line|Low level output White Line|High level output ## Outlook ![](./images/05019_02.png) ## Quick to Start ### 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) ## MakeCode Programming ### 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. ### Step 2 ### Code as below: ![](./images/05019_06.png) ### Link Link: [https://makecode.microbit.org/_hy3VDtA3xAqE](https://makecode.microbit.org/_hy3VDtA3xAqE) You may also download it directly below:
### Result Different icons display on the micro:bit in accordance with the different status detected by the tracking module. ## Python Programming ### Step 1 Download the package and unzip it: [PlanetX_MicroPython](https://github.com/lionyhw/PlanetX_MicroPython/archive/master.zip) Go to [Python editor](https://python.microbit.org/v/2.0) ![](./images/05001_07.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_08.png) ![](./images/05001_09.png) ![](./images/05019_10.png) ### Step 2 ### 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) ``` ### Result Different icons display on the micro:bit in accordance with the different status detected by the tracking module. ## Relevant File ## Technique File