Micro:bit handle control

1. Learning objectives

In this course, we mainly learn how to use MakeCode graphical programming to control Spider with the microbit handle.

2. Building blocks

For detailed steps of building blocks, please refer to the installation drawings of [Assembly Course]--[Spider] in the materials or the building block installation album.

3. Motor wiring

The motor wiring on the left side of the car is inserted into the M1 interface of the Super:bit expansion board, and the black line is close to the battery side;

The motor wiring on the right side of the car is inserted into the M3 interface of the Super:bit expansion board, and the black line is close to the battery side;

As shown below:

4. Programming

Method 1 Online programming:

First, connect micro:bit to the computer via a USB data cable. The computer will pop up a U disk. Click the URL in the U disk: https://makecode.microbit.org/ to enter the programming interface. Then, add the Yahboom software package to start programming.

Method 2 Offline programming:

Open the offline programming software MakeCode and enter the programming interface. Click [New] and then add the Yahboom software package to start programming.

superbit kit expansion package: https://github.com/YahboomTechnology/SuperBitLibV2 handle expansion package: https://github.com/YahboomTechnology/GHBitLib

4.1 Add expansion package

4.2 Blocks used

The location of the blocks required for this programming is shown in the figure below.

4.3 Add new variables

① Find the [Variable] option in the building block bar ---- [Set variable]

② Enter the variable name to complete the new variable.

4.4 Combined blocks

The summary program of microbit on Spider is shown in the figure below

Handle rocker control program is as follows

Handle gravity control program is as follows

You can also directly open the microbit-handle-control-Spider.hex、microbit-Handle-rocker-control.hex、microbit-Handle-gravity-control.hex files provided in this experiment and drag them into the browser that opens the URL, and the program diagram of this project source code will be automatically opened

5. Experimental phenomenon

We need to download the Spider program to the Spider's micro:bit motherboard, turn on the Spider's power switch, and we can see a weird face pattern on the micro:bit dot matrix;

Download the handle remote control program to the handle's micro:bit motherboard, turn on the handle's power switch, and we can see that the micro:bit dot matrix will be initialized to display a heart pattern, and then an "X" pattern will be displayed, indicating that the handle is in the default state and no data is sent.

The two will automatically complete the pairing, and then we can start remote control Spider.

The handle functions are as follows.

! Note: In the case of Handle-rocker-control, press the joystick to control the RGB light to go out. This function does not exist in the case of Handle-gravity-control.