brel/brel.py at main · L1Blom/brel · GitHub

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#!/usr/bin/env python3
"""
Brel blind control via RFXtrx433XL
Usage: python3 brel.py [device] [command] [percent]

Devices:  screen, rolluik1, rolluik2, all
Commands: up, down, stop, position
Example:  python3 brel.py screen position 50
          python3 brel.py all up
"""

import serial
import time
import sys

SERIAL_PORT = '/dev/ttyUSB0'
BAUD_RATE   = 38400

# ID: 10 20 30, unit codes per device
DEVICES = {
    'screen':   (0x41, 0x01),  # (BlindsT21 unit byte, DDxxxx unit code)
    'rolluik1': (0x42, 0x02),
    'rolluik2': (0x43, 0x03),
}

def send_blindst21(unit_byte, cmd_byte):
    """Send up/down/stop via BlindsT21 (subtype 0x15)."""
    with serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=2) as ser:
        ser.flushInput()
        packet = bytes([
            0x09, 0x19, 0x15, 0x00,
            0x10, 0x20, 0x30,
            unit_byte,
            cmd_byte,
            0x00,
        ])
        ser.write(packet)
        time.sleep(0.3)
        response = ser.read(10)
        print(f"  → {' '.join(f'{b:02X}' for b in packet)}  ACK: {' '.join(f'{b:02X}' for b in response)}")

def send_position(unit_code, percent):
    """Send percentage position via DDxxxx (packet type 0x31)."""
    percent = max(0, min(100, int(percent)))
    with serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=2) as ser:
        ser.flushInput()
        packet = bytes([
            0x0C, 0x31, 0x00, 0x00,
            0x10, 0x20, 0x30, 0x40,
            unit_code,
            0x04,          # percent command
            percent,
            0x00, 0x00,
        ])
        ser.write(packet)
        time.sleep(0.3)
        response = ser.read(10)
        print(f"  → {' '.join(f'{b:02X}' for b in packet)}  ACK: {' '.join(f'{b:02X}' for b in response)}")

def run(device, command, percent=None):
    targets = list(DEVICES.items()) if device == 'all' else []
    if device != 'all':
        if device not in DEVICES:
            print(f"Unknown device '{device}'. Use: {', '.join(DEVICES.keys())}, all")
            sys.exit(1)
        targets = [(device, DEVICES[device])]

    for name, (unit_byte, unit_code) in targets:
        print(f"Sending {command.upper()} to {name}...")
        if command == 'up':
            send_blindst21(unit_byte, 0x00)
        elif command == 'down':
            send_blindst21(unit_byte, 0x01)
        elif command == 'stop':
            send_blindst21(unit_byte, 0x02)
        elif command == 'position':
            if percent is None:
                print("position command requires a percentage value (0-100)")
                sys.exit(1)
            send_position(unit_code, percent)
        else:
            print(f"Unknown command '{command}'. Use: up, down, stop, position")
            sys.exit(1)

if __name__ == '__main__':
    if len(sys.argv) < 3:
        print(__doc__)
        sys.exit(1)

    device  = sys.argv[1].lower()
    command = sys.argv[2].lower()
    percent = sys.argv[3] if len(sys.argv) > 3 else None

    run(device, command, percent)