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https://github.com/arduino/serial-discovery

An Arduino IDE pluggable-discovery for Serial ports
https://github.com/arduino/serial-discovery

arduino go golang tooling-team

Last synced: 2 days ago
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An Arduino IDE pluggable-discovery for Serial ports

Host: GitHub
URL: https://github.com/arduino/serial-discovery
Owner: arduino
License: gpl-3.0
Created: 2018-11-29T16:16:08.000Z (about 6 years ago)
Default Branch: main
Last Pushed: 2024-11-06T16:18:54.000Z (about 2 months ago)
Last Synced: 2024-12-17T12:55:33.224Z (12 days ago)
Topics: arduino, go, golang, tooling-team
Language: Go
Homepage:
Size: 297 KB
Stars: 19
Watchers: 16
Forks: 3
Open Issues: 2
Metadata Files:
- Readme: README.md
- License: LICENSE.txt

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README

# Arduino pluggable discovery for serial ports

The `serial-discovery` tool is a command line program that interacts via stdio. It accepts commands as plain ASCII strings terminated with LF `\n` and sends response as JSON.

## How to build

Install a recent golang environment and run `go build`. The executable `serial-discovery` will be produced in your working directory.

## Usage

After startup, the tool waits for commands. The available commands are: `HELLO`, `START`, `STOP`, `QUIT`, `LIST` and `START_SYNC`.

#### HELLO command

The `HELLO` command is used to establish the pluggable discovery protocol between client and discovery.
The format of the command is:

`HELLO ""`

for example:

`HELLO 1 "Arduino IDE"`

or:

`HELLO 1 "arduino-cli"`

in this case the protocol version requested by the client is `1` (at the moment of writing there were no other revisions of the protocol).
The response to the command is:

```json
{
"eventType": "hello",
"protocolVersion": 1,
"message": "OK"
}
```

`protocolVersion` is the protocol version that the discovery is going to use in the remainder of the communication.

#### START command

The `START` starts the internal subroutines of the discovery that looks for ports. This command must be called before `LIST` or `START_SYNC`. The response to the start command is:

```json
{
"eventType": "start",
"message": "OK"
}
```

#### STOP command

The `STOP` command stops the discovery internal subroutines and free some resources. This command should be called if the client wants to pause the discovery for a while. The response to the stop command is:

```json
{
"eventType": "stop",
"message": "OK"
}
```

#### QUIT command

The `QUIT` command terminates the discovery. The response to quit is:

```json
{
"eventType": "quit",
"message": "OK"
}
```

after this output the tool quits.

#### LIST command

The `LIST` command returns a list of the currently available serial ports. The format of the response is the following:

```json
{
"eventType": "list",
"ports": [
{
"address": "/dev/ttyACM0",
"label": "/dev/ttyACM0",
"properties": {
"pid": "0x804e",
"vid": "0x2341",
"serialNumber": "EBEABFD6514D32364E202020FF10181E"
},
"hardwareId": "EBEABFD6514D32364E202020FF10181E",
"protocol": "serial",
"protocolLabel": "Serial Port (USB)"
}
]
}
```

The `ports` field contains a list of the available serial ports. If the serial port comes from an USB serial converter the USB VID/PID and USB SERIAL NUMBER properties are also reported inside `properties`.

The list command is a one-shot command, if you need continuous monitoring of ports you should use `START_SYNC` command.

#### START_SYNC command

The `START_SYNC` command puts the tool in "events" mode: the discovery will send `add` and `remove` events each time a new port is detected or removed respectively.
The immediate response to the command is:

```json
{
"eventType": "start_sync",
"message": "OK"
}
```

after that the discovery enters the "events" mode.

The `add` events looks like the following:

```json
{
"eventType": "add",
"port": {
"address": "/dev/ttyACM0",
"label": "/dev/ttyACM0",
"properties": {
"pid": "0x804e",
"vid": "0x2341",
"serialNumber": "EBEABFD6514D32364E202020FF10181E"
},
"hardwareId": "EBEABFD6514D32364E202020FF10181E",
"protocol": "serial",
"protocolLabel": "Serial Port (USB)"
}
}
```

it basically gather the same information as the `list` event but for a single port. After calling `START_SYNC` a bunch of `add` events may be generated in sequence to report all the ports available at the moment of the start.

The `remove` event looks like this:

```json
{
"eventType": "remove",
"port": {
"address": "/dev/ttyACM0",
"protocol": "serial"
}
}
```

in this case only the `address` and `protocol` fields are reported.

### Example of usage

A possible transcript of the discovery usage:

```
$ ./serial-discovery
START
{
"eventType": "start",
"message": "OK"
}
LIST
{
"eventType": "list",
"ports": [
{
"address": "/dev/ttyACM0",
"label": "/dev/ttyACM0",
"protocol": "serial",
"protocolLabel": "Serial Port (USB)",
"properties": {
"pid": "0x004e",
"serialNumber": "EBEABFD6514D32364E202020FF10181E",
"vid": "0x2341"
},
"hardwareId": "EBEABFD6514D32364E202020FF10181E"
}
]
}
START_SYNC
{
"eventType": "start_sync",
"message": "OK"
}
{ <--- this event has been immediately sent
"eventType": "add",
"port": {
"address": "/dev/ttyACM0",
"label": "/dev/ttyACM0",
"protocol": "serial",
"protocolLabel": "Serial Port (USB)",
"properties": {
"pid": "0x004e",
"serialNumber": "EBEABFD6514D32364E202020FF10181E",
"vid": "0x2341"
},
"hardwareId": "EBEABFD6514D32364E202020FF10181E"
}
}
{ <--- the board has been disconnected here
"eventType": "remove",
"port": {
"address": "/dev/ttyACM0",
"protocol": "serial"
}
}
{ <--- the board has been connected again
"eventType": "add",
"port": {
"address": "/dev/ttyACM0",
"label": "/dev/ttyACM0",
"protocol": "serial",
"protocolLabel": "Serial Port (USB)",
"properties": {
"pid": "0x004e",
"serialNumber": "EBEABFD6514D32364E202020FF10181E",
"vid": "0x2341"
},
"hardwareId": "EBEABFD6514D32364E202020FF10181E"
}
}
QUIT
{
"eventType": "quit",
"message": "OK"
}
$
```

## Security

If you think you found a vulnerability or other security-related bug in this project, please read our
[security policy](https://github.com/arduino/serial-discovery/security/policy) and report the bug to our Security Team 🛡️
Thank you!

e-mail contact: [email protected]

## License

The software is released under the GNU General Public License, which covers the main body
of the serial-discovery code. The terms of this license can be found at:
https://www.gnu.org/licenses/gpl-3.0.en.html

See [LICENSE.txt](https://github.com/arduino/serial-discovery/blob/master/LICENSE.txt) for details.