Hello everyone. Next, I’ll walk you through powering on the world’s smallest wheel-legged robot, an open-source project by student Mo Shibo. This intelligent control system is small but fully featured, and it’s a lot of fun, very mini, and very cool. First, let’s talk about how to charge it. To charge, you first need to unplug these three wires: red, black, and black. This connector is called a battery-side XH 2.54 plug. To charge, align the power adapter’s plug with this port, and it will start charging. During charging, the adapter will show either a red or green light; a green light indicates that it’s powered. It takes about an hour to fully charge. Once fully charged, unplug it and reconnect it to the original XH 2.54 plug, making sure the red wire is on the left side. Now, let’s power it on. The switch is located in front of this connector; flip it downward to turn it on. First, a red LED will light up, indicating that power is connected. You’ll also faintly feel the wheels vibrating. This is actually the dual wheels initiating FOC (Field-Oriented Control) motor initialization, where the two wheels make slight sequential movements, followed by leg motion. I can lift it up, and you’ll see that when lifted, it retracts its legs. If the battery is sufficiently charged, the blue LED on the mainboard will light up. It’s not lit right now, but the robot is still functional; this doesn’t affect normal operation. As you can see, its two legs retract sequentially. This process serves as a self-check. Once it’s complete, press the upper of the two white buttons. Wait for the self-check to finish. Okay, press the upper white button. It will retract its legs and then create a Wi-Fi hotspot. The Wi-Fi network name is “wlrobot,” and the password is also “wlrobot” in lowercase letters. After connecting, your device may提示 that there’s no internet access. Stay connected anyway, because this is a local network created by the robot itself and does not provide external internet access. Once connected to Wi-Fi, open your browser and enter the address 192.168.1.11. This will take you to the “Like the Wheel Robot to Web Control” interface, which is used to control the robot. I’ll place my phone here and gently lift the robot so its wheels lightly touch the ground. Then click “Robot Go.” There you go—it stands up. Now you can control it using the joystick. Forward, backward... Hmm, it might be a bit unstable, possibly because this desk isn’t very steady. When controlling the joystick, try to move it smoothly. Avoid snapping it back to the center abruptly; don’t control it like that. Instead, use smooth, linear movements. This helps prevent shaking. My desk might be tilted, causing some wobbling. The first slider adjusts the robot’s height. Let’s have it walk forward a bit. Again, my uneven desk might be affecting performance. You can adjust the height, and it can walk at different heights, though lower positions are more stable. The remaining three sliders aren’t particularly useful. Here we have controls for forward, backward, left, right, and a “Jump” function. The jump feature has a high failure rate; I’ve only succeeded once so far. That successful attempt was recorded by Shibo and posted as the first clip in his Bilibili video. If it falls over, just set it upright again, and it will resume normal walking. Let’s try placing it on the floor, which is flatter. Okay, it works fine on the floor too. Now let’s remote-control it with the phone. Right... Let’s try again. Oops, the height adjustment moved too quickly. Let’s raise it, then lower it. Okay, now let’s move it forward. Whoops, again too fast. This requires some skill. Holding the camera with one hand makes it inconvenient to operate precisely. Look, controlling it with smooth, linear motions works much better—avoid sudden jerks. See, it’s much more stable now. Man and machine as one. That completes all the operations. Finally, let’s discuss some features of the robot itself. To power it off, simply flip the switch upward. If you encounter bugs, restart the robot, as there may be occasional issues with the FOC motors. You can either press the upper white button or simply restart it. I recommend restarting directly whenever problems arise. Let’s take a look at the body. The legs are 3D-printed using nylon. Unlike cheaper materials such as PLA (polylactic acid) resin or ABS engineering plastic, this nylon material is exceptionally fine. What capabilities does this wheel-legged robot offer? It can climb stairs, jump, leap over obstacles, or adapt to uneven surfaces