# id5100 — CI-V control for the ICOM ID-5100

Software control layer for the ID-5100 mobile transceiver over CI-V, via the
RT Systems USB-29A cable (FTDI) plugged into the radio's **[SP2]** jack.

- **Verified link:** `/dev/ttyUSB0`, **9600 baud**, radio CI-V address **0x8C**.
- **No dependencies** — pure stdlib (`termios`), no pyserial.

## Layers

| File | Role | Tested by |
|------|------|-----------|
| `civ.py` | Pure CI-V codec: BCD freq/level encode-decode, frame build/parse | `test_civ.py` (11 unit tests) |
| `radio.py` | Serial transport + high-level `Radio` class (get/set freq, mode, vol, sql, smeter) | live-radio integration |
| `cli.py` | Command-line front end | live-radio integration |
| `server.py` | Web control-panel server (stdlib `http.server` + JSON API) | live-radio integration |
| `panel.html` | Instrument-panel web UI (amber VFD, S-meter, mode/level controls) | headless screenshot |
| `civ_probe.py` | One-shot link probe (read VFO frequency) | — |

## CLI

```bash
./cli.py status            # freq, mode, volume, squelch, s-meter at a glance
./cli.py freq              # read VFO (MHz)
./cli.py freq 146.52       # set VFO to 146.520 MHz
./cli.py mode fm           # set mode: lsb/usb/am/cw/fm/dv
./cli.py vol 30            # set AF volume 0-255 (read with no arg)
./cli.py sql 60            # set squelch level 0-255
./cli.py smeter            # read S-meter 0-255
# global: --port /dev/ttyUSB0  --baud 9600
```

## Web panel

```bash
python3 server.py            # http://<host>:8550/  (binds 0.0.0.0 -> phone-reachable)
# --port 8550  --serial /dev/ttyUSB0  --baud 9600
```

Holds the serial port for its lifetime, so **don't run `cli.py` while the server
is up** (one process owns `/dev/ttyUSB0`). The page polls `/api/status` ~1/s for
live frequency, mode, S-meter, squelch, and levels; controls POST to
`/api/{freq,mode,vol,sql}`.

## Library

```python
from radio import Radio
with Radio("/dev/ttyUSB0", 9600) as r:
    r.get_frequency()        # -> Hz
    r.set_frequency(146_520_000)
    r.get_mode()             # -> ("FM", 0x05)
    r.set_volume(30)
```

## Tests

```bash
python3 -m unittest test_civ -v
```

## Gotchas / verified facts

- **[SP2] *is* the CI-V port** on the ID-5100 (doubles as 2nd speaker jack).
- **Bus echo:** the radio echoes your TX frame before replying; `transact()`
  filters frames where `frm != RADIO_ADDR`.
- **Frequency BCD is little-endian; level/meter BCD is big-endian** (`128 -> 01 28`).
- **Mode FM = 0x05** confirmed empirically. `DV = 0x17` is from the generic
  ICOM table and **not yet verified on this radio** — confirm before relying on it.
- Scope is CI-V (operate the radio). D-STAR DR routing / callsign entry live in
  the separate RS-MS1A data-jack protocol, not here.
```