✨ Adds option to control sim using web app
This commit is contained in:
Rune Harlyk
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import time
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import asyncio
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import websockets
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import json
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import numpy as np
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from typing import Dict, Any
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from abc import ABC, abstractmethod
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from src.robot.kinematics import BodyStateT, KinConfig
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from src.robot.gait import GaitStateT, GaitType, default_offset, default_stand_frac
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class Controller(ABC):
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@abstractmethod
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def update(self, body_state: BodyStateT, gait_state: GaitStateT, dt: float):
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pass
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@abstractmethod
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def is_running(self) -> bool:
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pass
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class GUIController(Controller):
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def __init__(self, env):
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self.env = env
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def update(self, body_state: BodyStateT, gait_state: GaitStateT, dt: float):
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self.env.gui.update_gait_state(gait_state)
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self.env.gui.update_body_state(body_state)
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self.env.gui.update()
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def is_running(self) -> bool:
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return True
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class WebSocketController(Controller):
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def __init__(self, port: int = 8765):
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self.port = port
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self.running = False
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self.connected_clients = set()
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self.cmd_lx = 0.0
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self.cmd_ly = 0.0
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self.cmd_rx = 0.0
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self.cmd_ry = 0.0
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self.cmd_h = 0.0
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self.cmd_s = 0.0
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self.cmd_s1 = 0.0
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self.motion_mode = "rest"
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self.current_gait_type = GaitType.TROT_GATE
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self.last_broadcast_time = time.time()
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print(f"[*] WebSocket Controller initialized")
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print(f" Port: {port}")
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def handle_input(self, input_data: list):
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if len(input_data) >= 7:
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self.cmd_lx = float(input_data[0])
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self.cmd_ly = float(input_data[1])
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self.cmd_rx = float(input_data[2])
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self.cmd_ry = float(input_data[3])
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self.cmd_h = float(input_data[4])
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self.cmd_s = float(input_data[5])
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self.cmd_s1 = float(input_data[6])
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def handle_mode(self, mode: int):
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modes = {0: "deactivated", 1: "idle", 2: "calibration", 3: "rest", 4: "stand", 5: "walk"}
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if mode in modes:
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self.motion_mode = modes[mode]
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print(f"[*] Mode changed to: {self.motion_mode}")
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else:
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print(f"[!] Invalid mode: {mode}")
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def handle_walk_gait(self, gait: int):
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if gait == 0:
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self.current_gait_type = GaitType.TROT_GATE
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print(f"[*] Gait changed to: TROT")
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return default_offset[GaitType.TROT_GATE], default_stand_frac[GaitType.TROT_GATE]
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elif gait == 1:
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self.current_gait_type = GaitType.CRAWL_GATE
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print(f"[*] Gait changed to: CRAWL")
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return default_offset[GaitType.CRAWL_GATE], default_stand_frac[GaitType.CRAWL_GATE]
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else:
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print(f"[!] Invalid gait: {gait}")
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return None, None
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def update(self, body_state: BodyStateT, gait_state: GaitStateT, dt: float):
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if self.motion_mode == "walk":
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body_state["ym"] = KinConfig.min_body_height + self.cmd_h * KinConfig.body_height_range
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body_state["psi"] = self.cmd_ry * KinConfig.max_pitch
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gait_state["step_height"] = (
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self.cmd_s1 * KinConfig.max_step_height if self.cmd_s1 != 0 else KinConfig.default_step_height
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)
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gait_state["step_x"] = self.cmd_ly * KinConfig.max_step_length
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gait_state["step_z"] = -self.cmd_lx * KinConfig.max_step_length
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gait_state["step_velocity"] = self.cmd_s if self.cmd_s != 0 else 1.0
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gait_state["step_angle"] = self.cmd_rx
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gait_state["step_depth"] = KinConfig.default_step_depth
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elif self.motion_mode == "stand":
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body_state["ym"] = KinConfig.min_body_height + self.cmd_h * KinConfig.body_height_range
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body_state["xm"] = self.cmd_ly * KinConfig.max_body_shift_x
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body_state["zm"] = self.cmd_lx * KinConfig.max_body_shift_z
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body_state["phi"] = self.cmd_rx * KinConfig.max_roll
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body_state["psi"] = self.cmd_ry * KinConfig.max_pitch
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elif self.motion_mode in ["rest", "idle", "calibration"]:
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gait_state["step_x"] = 0.0
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gait_state["step_z"] = 0.0
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gait_state["step_angle"] = 0.0
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async def handle_client(self, websocket, path):
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client_addr = websocket.remote_address
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print(f"[+] Client connected: {client_addr}")
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self.connected_clients.add(websocket)
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try:
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async for message in websocket:
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try:
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data = json.loads(message)
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if not isinstance(data, list) or len(data) < 1:
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continue
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msg_type = data[0]
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if msg_type == 0:
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if len(data) >= 2:
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event = data[1]
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print(f"[*] Client subscribed to: {event}")
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elif msg_type == 1:
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if len(data) >= 2:
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event = data[1]
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print(f"[*] Client unsubscribed from: {event}")
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elif msg_type == 2:
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if len(data) >= 3:
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event = data[1]
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payload = data[2]
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await self.handle_event(websocket, event, payload)
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elif msg_type == 4:
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await websocket.send(json.dumps([4]))
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except json.JSONDecodeError:
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print(f"[!] Invalid JSON from {client_addr}")
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except Exception as e:
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print(f"[!] Error handling message: {e}")
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except websockets.exceptions.ConnectionClosed:
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print(f"[-] Client disconnected: {client_addr}")
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finally:
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self.connected_clients.discard(websocket)
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async def handle_event(self, websocket, event: str, data: Any):
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if event == "input":
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if isinstance(data, list) and len(data) >= 7:
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self.handle_input(data)
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elif event == "mode":
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self.handle_mode(data)
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elif event == "walk_gait":
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self.handle_walk_gait(data)
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async def broadcast_angles(self, joint_angles: np.ndarray):
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if self.connected_clients and time.time() - self.last_broadcast_time > 0.1:
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state_message = json.dumps([2, "angles", joint_angles.tolist()])
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disconnected = set()
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for client in self.connected_clients:
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try:
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await client.send(state_message)
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except websockets.exceptions.ConnectionClosed:
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disconnected.add(client)
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self.connected_clients -= disconnected
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self.last_broadcast_time = time.time()
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async def start_server(self):
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print(f"[*] Starting WebSocket server on port {self.port}")
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self.running = True
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server = await websockets.serve(self.handle_client, "0.0.0.0", self.port, ping_interval=20, ping_timeout=10)
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print(f"[+] Server running on ws://0.0.0.0:{self.port}")
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print(f"[*] Connect from same PC: ws://localhost:{self.port}")
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print(f"[*] Connect from network: ws://<your-ip>:{self.port}")
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print("[*] Ready for controller connections!")
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print("[*] Use the controller app to connect and control the robot")
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return server
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def is_running(self) -> bool:
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return self.running
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