311 lines
6.3 KiB
Markdown
311 lines
6.3 KiB
Markdown
# Lunar Vein: Arduino
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A **SIMPLE** REST API based serial communication. Assisted Firmata protocol and johnny-five API, enabling software communication with the Arduino board using the Server API. that's it. Idk about electronics and networking actually. But that piece of knowledge motivated me to make some IoT stuff. Enjoy (づ￣ ³￣)づ
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<small>*the animation is from ENA BBQ series by JoelG</small>
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## Setup
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Tools that are required
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- Arduino Board
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- [Arduino IDE](https://www.arduino.cc/en/software)
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- [Node.js](https://nodejs.org/en) v16.0.0^ or other javascript runtime
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### Board
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Arduino assembly guide also available in [johnny-five](https://github.com/rwaldron/johnny-five?tab=readme-ov-file#setup-and-assemble-arduino) documentation
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1. Plug in your Board via USB
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2. Open Arduino IDE then select your Board
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3. Go to `File > Examples > Firmata` Select `StandarFirmataPlus`
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4. Upload the sketch
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### Server
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1. Clone project and Install
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```bash
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git clone https://github.com/norman-andrians/lunar-vein-arduino.git && cd lunar-vein-arduino
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npm i
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```
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2. Add `.env` file in the project root directory with the `SERIAL_PORT` variable
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```dotenv
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SERIAL_PORT=/dev/ttyUSB0
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```
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3. Run the project
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```bash
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npm start
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```
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#### Other scripts
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- You can see what ports are connected to the device by running `npm run ports` script.
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```bash
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npm run ports
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```
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```
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> lunar-vein-arduino@1.0.0 ports
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> ts-node src/ports/print.ts
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3 Ports available
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1. /dev/ttyUSB0
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2. /dev/ttyUSB1
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3. /dev/ttyACM0
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```
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# API Documentation
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## Table of contents
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- [Common HTTP Responses](#common-http-responses)
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- [JSON Response](#json-response)
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- [Example Request](#example-request)
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- [PIN](#pin)
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- [Read pin mode](#read-pin-mode)
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- [Set pin mode](#set-pin-mode)
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- [LED](#led)
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- [Read LED state](#read-led-state)
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- [Set LED state](#set-led-state)
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- [RGB LED](#rgb-led)
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- [Read RGB state](#read-rgb-state)
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- [Set RGB state](#set-rgb-state)
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## Common HTTP Responses
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Some HTTP responses are sent with JSON, otherwise an HTML body will be sent which is the default express.js response
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| HTTP Status | Marks |
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|-------------|-------|
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| 200 | The request `act` was successful |
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| 400 | You may be making an invalid request, try to check the payload or recheck the documentation. |
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| 404 | The resource wass not found |
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| 405 | Method not allowed, servers usually only accept `GET` and `PATCH` methods |
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| 500 | An error in the app server, if it continues please raise an issue or ask to contribute. |
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## JSON Response
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```json
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{
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"status": 200,
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"pin_state": {
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"13": "HIGH"
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},
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"message": "Changed pin state 13 to HIGH"
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}
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```
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| Property | Description |
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|----------|-------------|
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| status | HTTP Status code |
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| pin_state | The state value of the pin that has been changed |
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| message | Descriptive message of the changed state |
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## Example Request
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This is an example of javascript code sending a request to turn on the LED light, [See LED API](#set-led-state)
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```javascript
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async function turnOnLed() {
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const res = await fetch("http://localhost:3000/led/13/on"); // Set LED to HIGH
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const data = await res.json();
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console.log(data); // { status: 200, pin_state: { 13: high }, message: "Pin 13 Set to HIGH" }
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}
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```
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## PIN
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### Read pin mode
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- **URL Endpoint**
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/pin/:p/
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- **URL Params**
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| Params | Mark | Type | Required | Description |
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|--------|------|------|----------|-------------|
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| p | pin | `string` | true | Seleced pin |
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- **Method**
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`GET`
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- **Sample Response**
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```json
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{
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"status": 200,
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"pins": [
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{
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"pin": 13,
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"mode": "OUTPUT"
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}
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],
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"message": "Pin 13 is OUTPUT"
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}
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```
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### Set pin mode
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- **URL Endpoint**
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/pin/:p/:m
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- **URL Params**
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| Params | Mark | Type | Required | Description |
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|--------|------|------|----------|-------------|
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| p | pin | `string` | true | Seleced pin |
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| m | mode | `'input'`, `'output'`, `'servo'` | true | Pin Mode |
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- **Method(s)**
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`PATCH`
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- **Sample Response**
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```json
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{
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"status": 200,
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"pins": [
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{
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"pin": 13,
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"mode": "OUTPUT"
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}
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],
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"message": "Pin 13 setted as OUTPUT"
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}
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```
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## LED
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### Read LED state
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- **URL Endpoint**
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/led/:p/
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- **URL Params**
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| Params | Mark | Type | Required | Description |
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|--------|------|------|----------|-------------|
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| p | pin | `string` | true | Seleced pin |
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- **Method**
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`GET`
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- **Sample Response**
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```json
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{
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"status": 200,
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"pin_state": {
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"13": "HIGH"
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},
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"message": "Led pin 13 is HIGH"
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}
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```
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### Set LED state
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- **URL Endpoint**
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/led/:p/:a
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- **URL Params**
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| Params | Mark | Type | Required | Description |
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|--------|------|------|----------|-------------|
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| p | pin | `string` | true | Seleced pin |
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| a | act | `'on'`, `'off'`, `'high'`, `'low'` | true | Action |
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- **Method(s)**
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`PATCH`
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- **Sample Response**
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```json
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{
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"status": 200,
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"pin_state": {
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"13": "HIGH"
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},
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"message": "Changed pin state 13 to HIGH"
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}
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```
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## RGB LED
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### Read RGB state
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- **URL Endpoint**
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/rgb-led
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- **Body**
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```javascript
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{
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r: number,
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g: number,
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b: number
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}
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```
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- **Method**
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`POST`
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- **Sample Response**
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```json
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{
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"status": 200,
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"pin_state": {
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"7": true,
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"6": true,
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"5": false
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}
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}
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```
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### Set RGB state
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- **URL Endpoint**
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/rgb-led
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- **Body**
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```javascript
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{
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r: {
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pin: number,
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value: boolean
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},
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g: {
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pin: number,
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value: boolean
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},
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b: {
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pin: number,
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value: boolean
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}
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}
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```
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- **Method(s)**
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`PATCH`
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- **Sample Response**
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```json
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{
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"status": 200,
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"pin_state": {
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"7": true,
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"6": true,
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"5": false
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},
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"message": "Success changed pins 7, 6, 5 to state HIGH, HIGH, LOW"
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}
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```
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