Pybricks
problème de contrôle #2354
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Je veux appuyer sur ZQSD pour diriger une voiture à deux roues et, pour cela, je dois cliquer sur Z puis sur Entrée pour qu’elle avance. Moi, je voudrais que, quand je clique sur Z, ça avance jusqu’à ce que je lâche. Voici mon programme : from pybricks.hubs import TechnicHub
from pybricks.pupdevices import Motor
from pybricks.parameters import Button, Color, Direction, Port, Side, Stop
from pybricks.robotics import DriveBase
from pybricks.tools import wait, StopWatch
hub = TechnicHub()
from pybricks.hubs import TechnicHub
from pybricks.pupdevices import Motor
from pybricks.parameters import Port
from pybricks.tools import wait
# Initialiser le hub et les moteurs
hub = TechnicHub()
left_motor = Motor(Port.A)
right_motor = Motor(Port.B)
# Vitesse
SPEED = 300
print("Contrôle avec Z (avant), S (arrière), Q (gauche), D (droite). Tape 'x' pour quitter.")
while True:
key = input("Commande (z/s/q/d/x): ").lower()
if key == 'q':
left_motor.run(300)
right_motor.run(300)
elif key == 'd':
left_motor.run(-300)
right_motor.run(-300)
elif key == 'z':
left_motor.run(-300)
right_motor.run(300)
elif key == 's':
left_motor.run(300)
right_motor.run(-300)
elif key == 'x':
break
else:
left_motor.stop()
right_motor.stop()
wait(500)
left_motor.stop()
right_motor.stop()
print("Programme terminé.") |
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Replies: 2 comments 7 replies
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It isn't possible to do this using just the terminal in Pybricks Code using this method. It does not know anything about when a key was pressed or when a key was released. It only knows that you typed a letter in the terminal. You would need to write a special program on your computer that can detect the key press separately from the key release. Then use that to send one letter when a key is pressed and a different letter when a key is released to get the two different events. |
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Merci pour votre réponse. Serait-il possible qu’une personne apporte les modifications nécessaires au bon fonctionnement de mon programme ? Merci d’avance. |
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To make your program work, change the line Then click the cursor in the console in Pybricks Code and you should see motors move when you press the keys. I assume In order to also send key released events to the hub I put together a dirty but working html page from code pices I had lying around: <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>LEGO Hub Control</title>
</head>
<body>
<button id="connect">Connect with BLE device</button>
<button id="start" disabled>Start Program</button>
<p id="output"></p>
<script>
var serviceUuid = 'c5f50001-8280-46da-89f4-6d8051e4aeef';
var characteristicUuid = 'c5f50002-8280-46da-89f4-6d8051e4aeef';
var bluetoothDeviceDetected;
var gattCharacteristic;
document.querySelector('#connect').addEventListener('click', function() {
if (isWebBluetoothEnabled()) { connect() }
});
document.querySelector('#start').addEventListener('click', function(event) {
startProgram()
});
function isWebBluetoothEnabled() {
if (!navigator.bluetooth) {
console.log('Web Bluetooth API is not available in this browser!');
return false;
}
return true;
}
function getDeviceInfo() {
let options = {
acceptAllDevices: true,
optionalServices: [serviceUuid]
};
console.log('Requesting Bluetooth Device...');
return navigator.bluetooth.requestDevice(options).then(device => {
bluetoothDeviceDetected = device;
}).catch(error => {
console.log('Error: ' + error);
});
}
function connect() {
return (bluetoothDeviceDetected ? Promise.resolve() : getDeviceInfo())
.then(connectGATT)
.catch(error => {
console.log('Error while reading: ' + error);
});
}
function connectGATT() {
if (bluetoothDeviceDetected.gatt.connected && gattCharacteristic) {
return Promise.resolve();
}
return bluetoothDeviceDetected.gatt.connect()
.then(server => {
console.log('Getting GATT Service...');
return server.getPrimaryService(serviceUuid);
})
.then(service => {
console.log('Getting GATT Characteristic...');
return service.getCharacteristic(characteristicUuid);
})
.then(characteristic => {
characteristic.addEventListener('characteristicvaluechanged', event => {
var view = event.target.value;
console.log('received', view);
var decoder = new TextDecoder('utf-8');
document.querySelector('#output').innerHTML += Date.now() + " " + decoder.decode(view.buffer) + "<br />";
});
console.log('Starting notifications...');
return characteristic.startNotifications();
})
.then(characteristic => {
gattCharacteristic = characteristic;
document.querySelector('#start').disabled = false;
});
}
function startProgram() {
console.log('Starting program...');
gattCharacteristic.writeValue(new Uint8Array([0x01]));
}
document.onkeydown = event => {
if(event.repeat) return;
console.log(event.key, "pressed");
gattCharacteristic.writeValue(new Uint8Array([0x06, event.key.charCodeAt(0)]))
.catch(error => {
console.log('Error sending keydown: ' + error);
});
}
document.onkeyup = event => {
console.log(event.key, "released");
gattCharacteristic.writeValue(new Uint8Array([0x06, 0x00]))
.catch(error => {
console.log('Error sending keyup: ' + error);
});
}
</script>
</body>
</html>There is also a tutorial on how to do the same with python: https://pybricks.com/projects/tutorials/wireless/hub-to-device/pc-communication/ |
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Dernière petite question à propos du code : est-ce que je dois juste le copier-coller ??? |
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yes, just copy the html into a plain text file, give it a name ending with .html and open it with a browser like google-chrome. |
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Je suis super reconnaissant pour le temps que tu as pris à coder ça pour moi, merci ! |
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Je suis super reconnaissant pour le temps que tu as pris à coder ça pour moi, merci ! |
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pk vous aviez dit que la page html et sale |
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There is nothing wrong, but it should not be taken as an example of how to write good code. Amongs the things I consider to be done badly is:
|
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It isn't possible to do this using just the terminal in Pybricks Code using this method. It does not know anything about when a key was pressed or when a key was released. It only knows that you typed a letter in the terminal.
You would need to write a special program on your computer that can detect the key press separately from the key release. Then use that to send one letter when a key is pressed and a different letter when a key is released to get the two different events.