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gitea 5a8527e96e Add multi-protocol scale support and admin COM monitor

The bridge becomes pure transport: it opens the port, writes a poll
string it is given at runtime, and streams raw lines. Protocol
definitions live in Django and parsing happens in the browser, so a new
scale type never means a new binary on the station PCs. The poll loop
stays in the bridge because a browser cannot be the heartbeat - hidden
tabs get throttled and a closed tab would stop the scale.

Every payload now carries a hex field. Toledo Continuous sends STX and
bit-packed status, which UTF-8 decoding silently corrupts. Fixed-column
protocols need the opposite care: a space can mean balanced, so the
trailing whitespace must survive.

Parsers for the simulator, fixed-column, Toledo Continuous and SICS
return an explicit error rather than a guess on a frame that does not
match, since a silently wrong weight on a weighbridge is worse than no
weight. Toledo and SICS are written from documented structure and have
not been validated against real hardware.

The admin monitor shows the raw stream as text and hex, sends one-off
probe commands, and builds fixed-column protocols against captured
lines. Spaces render as middots because in some protocols a space is
the stability flag.

The test writer now simulates a weighing cycle - idle, ramp, balanced,
drop - alternating empty and loaded trucks, quantised to the 20kg and
50kg divisions real truck scales use.

Bridge logging rotates and per-reading lines drop to DEBUG; the old
config had grown two log files totalling 368MB.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

2026-09-18 18:58:00 +03:00

.env.example

barebone app with django and react, sse, jwt token, comport reader, test comport writer, requires com0com, users with groups, sample table vehicles, tokens for access and refresh

2026-01-17 13:03:21 +02:00

config.py

Add multi-protocol scale support and admin COM monitor

2026-09-18 18:58:00 +03:00

README.md

barebone app with django and react, sse, jwt token, comport reader, test comport writer, requires com0com, users with groups, sample table vehicles, tokens for access and refresh

2026-01-17 13:03:21 +02:00

requirements.txt

barebone app with django and react, sse, jwt token, comport reader, test comport writer, requires com0com, users with groups, sample table vehicles, tokens for access and refresh

2026-01-17 13:03:21 +02:00

test_writer.py

Add multi-protocol scale support and admin COM monitor

2026-09-18 18:58:00 +03:00

README.md

COM Port Test Writer - Simulates device sending data

This utility simulates a physical device (like scales) by continuously writing test data to a COM port.

Features

✅ Writes test data continuously to COM port
✅ Multiple data types: scales, counter, random, mixed
✅ Configurable write interval
✅ Easy start/stop with Ctrl+C
✅ List available COM ports
✅ Command-line arguments

Setup

Install dependencies:
```
pip install -r requirements.txt
```

Configure environment (optional):

copy .env.example .env
# Edit .env with your settings

Usage

List Available COM Ports

python test_writer.py --list

Basic Usage (using configured port)

python test_writer.py

Specify COM Port

python test_writer.py --port COM3

Different Data Types

Scales Data (default) - Simulates scale readings

python test_writer.py --type scales

Counter Data - Incrementing numbers

python test_writer.py --type counter

Random Data - Random numeric values

python test_writer.py --type random

Mixed Sensor Data - Temperature, humidity, pressure

python test_writer.py --type mixed

Custom Write Interval

python test_writer.py --interval 2.0  # Send every 2 seconds
python test_writer.py --interval 0.5  # Send every 0.5 seconds

Custom Baud Rate

python test_writer.py --baud 115200

Testing Workflow

Start Serial Bridge (reads COM port)
```
cd serial_bridge
python app.py
```

Start Test Writer (writes test data)

cd test_comport_writer
python test_writer.py --type scales --interval 1.0

View in React Frontend
- Open http://localhost:3000
- Data should appear in real-time

Configuration

Edit .env for default settings:

COM_PORT=COM1
BAUD_RATE=9600
WRITE_INTERVAL=1.0
TEST_DATA_TYPE=scales
SCALES_MIN=0
SCALES_MAX=100

Example Output

==================================================
COM Port Test Writer
==================================================
Port: COM1
Baud Rate: 9600
Data Type: scales
Write Interval: 1.0s
==================================================

✓ Connected to COM1 at 9600 baud
Press Ctrl+C to stop writing data

→ Sent: 45.23 kg
→ Sent: 45.67 kg
→ Sent: 46.12 kg
→ Sent: 46.45 kg
...
(Press Ctrl+C to stop)

✓ Disconnected from COM1
✓ Test writer stopped

Troubleshooting

"COM port not found": Check COM_PORT setting and ensure port exists
"Port already in use": Another application is using the port (close Serial Bridge temporarily)
No data appearing: Ensure Serial Bridge is running and pointing to same COM port
Baud rate mismatch: Ensure test writer and serial bridge use same baud rate

Complete System Test

To test the complete flow:

# Terminal 1: Django Backend
cd backend
venv\Scripts\activate
python manage.py runserver

# Terminal 2: React Frontend
cd frontend
npm start

# Terminal 3: Serial Bridge
cd serial_bridge
venv\Scripts\activate
python app.py

# Terminal 4: Test Writer
cd test_comport_writer
python test_writer.py --type scales --interval 1.0

Then visit http://localhost:3000 to see real-time data flow.