Add rooms as 'parallel' in socket handler and add digital analog api

src/controller/basic/analog.ts

@@ -0,0 +1,47 @@
+import { Request, Response } from "express";
+import { board } from "../../setup";
+import * as Promises from "../../promises";
+
+interface AnalogState {
+    pin: number | string,
+    value: number
+}
+
+export function analogWrite (req: Request, res: Response): Response<string | any> {
+    const { pin, value }: AnalogState = req.body;
+
+    try {
+        board.analogWrite(pin, value);
+    
+        return res.status(200).json({
+            status: 200,
+            analog_state: {
+                [pin]: value
+            }
+        });
+    }
+    catch (err) {
+        console.error(err);
+        res.sendStatus(500);
+    }
+}
+
+export async function analogRead (req: Request, res: Response) {
+    let { pin } = req.params;
+    pin = pin[0] == "A" ? pin.slice(1, pin.length) : pin;
+
+    try {
+        const value = await Promises.analogRead(board, pin);
+    
+        return res.status(200).json({
+            status: 200,
+            analog_state: {
+                [pin]: value
+            }
+        })
+    }
+    catch (err) {
+        console.error(err);
+        res.sendStatus(500);
+    }
+}

src/controller/basic/digital.ts

@@ -0,0 +1,54 @@
+import { Request, Response } from "express";
+import { board } from "../../setup";
+
+interface DigitalState {
+    pin: number | string,
+    state: string
+}
+
+export function digitalWrite (req: Request, res: Response): Response<string | any> {
+    const { pin, state }: DigitalState = req.body;
+    let value: number;
+
+    try {
+        switch (state) {
+            case 'LOW' || 0: value = 0; break;
+            case 'HIGH' || 1: value = 1; break;
+            default:
+                return res.status(400).json({
+                    status: 400,
+                    message: `Invalid state ${state}, read the documentation`
+                })
+        }
+    
+        const val = value == 1 ? "HIGH" : "LOW";
+        board.digitalWrite(pin, value);
+    
+        return res.status(200).json({
+            status: 200,
+            pin_state: {
+                [pin]: val
+            }
+        });
+    }
+    catch (err) {
+        console.error(err);
+        res.sendStatus(500);
+    }
+}
+
+export function digitalRead (req: Request, res: Response): Response<string | any> {
+    try {
+        const { pin } = req.params;
+        const value = board.pins[pin].value == 1 ? 'HIGH' : 'LOW';
+        return res.status(200).json({
+            pin_state: {
+                [pin]: value
+            }
+        });
+    }
+    catch (err) {
+        console.error(err);
+        res.sendStatus(500);
+    }
+}

src/controller/basic/pin.ts

@@ -1,6 +1,6 @@
 import { Request, Response } from "express";
-import { board, suBoard } from "../setup";
-import { sPinModes } from ".";
+import { board, suBoard } from "../../setup";
+import { sPinModes } from "..";
 import { Pin } from "johnny-five";
 
 export function readPin (req: Request, res: Response) {

src/controller/components/led.ts

@@ -1,6 +1,6 @@
 import { Request, Response } from "express";
-import { board } from "../setup";
-import { ChannelPins, digitalValue, voltage } from ".";
+import { board } from "../../setup";
+import { ChannelPins, digitalValue, voltage } from "..";
 import { Led } from "johnny-five";
 
 

src/controller/components/photoresistor.ts

@@ -1,6 +1,6 @@
 import { Request, Response } from "express";
-import { board } from "../setup";
-import { analogRead } from "../promises";
+import { board } from "../../setup";
+import { analogRead } from "../../promises";
 
 export async function readResistor (req: Request, res: Response): Promise<Response<string, any>> {
     const { p } = req.params;

src/controller/components/piezo.ts

@@ -1,6 +1,6 @@
 import { Request, Response } from "express";
 import { Piezo } from "johnny-five";
-import { Pitch } from "../melodies";
+import { Pitch } from "../../melodies";
 
 export function piezoTone (req: Request, res: Response): Response {
     const pin: number = Number.parseInt(req.params.p);

src/controller/components/servo.ts

@@ -1,5 +1,5 @@
 import { Request, Response } from "express";
-import { board } from "../setup";
+import { board } from "../../setup";
 
 export function rotateServo (req: Request, res: Response): Response<string, any> {
     const { p } = req.params;

src/handlers/socketHandler.ts

@@ -1,23 +1,55 @@
 import { Socket } from "socket.io";
-import { Pin } from "johnny-five";
+import { Pin, Sensor } from "johnny-five";
 import { board } from "../setup";
 
 export default (socket: Socket) => {
     console.log(`${socket.id} | ${socket.client.request.headers.host} | Joined`);
 
-    socket.on("servo", (p: string, ang: string) => {
-        const pin = Number.parseInt(p);
-        const angle = Number.parseInt(ang);
+    socket.on("servo", (p: string, ang: string, cb?: (msg?: string) => void) => {
+        const pin: number = Number.parseInt(p);
+        const angle: number = Number.parseInt(ang);
 
         board.pinMode(pin, Pin.SERVO);
         board.servoWrite(pin, angle);
+
+        if (cb) cb(`Set servo pin ${p} to ${angle} degrees`);
         console.log(socket.id, pin, angle);
     })
 
-    socket.on("set-photoresistor", (pin: string) => {
-        board.analogRead(pin, (value) => {
-            socket.emit("photoresistor", value);
-            console.log(socket.id, "A"+pin, value);
-        });
+    socket.on("set-photoresistor", (pin: string, cb?: (msg?: string) => void) => {
+        const room = `resistor-${pin}`;
+        
+        if (!socket.rooms.has(room)) {
+            socket.join(room);
+
+            const sensor = new Sensor({
+                pin: pin,
+                board: board,
+                type: "analog",
+                freq: 250
+            });
+
+            sensor.on("change", () => {
+                socket.to(room).emit("photoresistor", sensor.value);
+            });
+            
+            console.log(`New room: ${room}`);
+            console.log(`${socket.id} joined room ${room}`);
+            
+            if (cb) cb(`Set pin resistor to pin ${pin}`);
+        }
+        else {
+            if (cb) cb(`Resistor pin ${pin} is already used, try to lisen to "photoresistor" room: ${room}`);
+        }
+    })
+
+    socket.on("join-photoresistor", (pin) => {
+        const room = `resistor-${pin}`;
+
+        if (!socket.rooms.has(room)) {
+            socket.join(room);
+            console.log(socket.rooms);
+            console.log(`${socket.id} Joined room ${room}`);
+        }
     })
 }

src/routes/api.ts

@@ -1,17 +1,19 @@
 import { Response } from "express";
 import { Router } from "express";
 
-import { readLed, readRgbLed, writeLed, writeRgbLed } from "../controller/led";
-import { readPin, setPin } from "../controller/pin";
-import { piezoNoTone, piezoNote, piezoPlayNotes, piezoTone } from "../controller/piezo";
-import { rotateServo } from "../controller/servo";
-import { readResistor } from "../controller/photoresistor";
+import { readPin, setPin } from "../controller/basic/pin";
+import { digitalRead, digitalWrite } from "../controller/basic/digital";
+import { analogRead, analogWrite } from "../controller/basic/analog";
+
+import { readLed, readRgbLed, writeLed, writeRgbLed } from "../controller/components/led";
+import { piezoNoTone, piezoNote, piezoPlayNotes, piezoTone } from "../controller/components/piezo";
+import { rotateServo } from "../controller/components/servo";
+import { readResistor } from "../controller/components/photoresistor";
 
 import { isPinNumeric } from "../middleware/pin";
 
 const router: Router = Router();
 
-// Client page
 router.get('/hello', (req, res: Response): Response<string> => {
     return res.status(200).send("Hello");
 })
@@ -20,6 +22,15 @@ router.get('/hello', (req, res: Response): Response<string> => {
 router.get('/pin/:p', readPin);
 router.patch('/pin/:p/:m', setPin);
 
+// Digital read/write
+router.get('/digital/:pin', digitalRead);
+router.patch('/digital', digitalWrite);
+
+// Analog read/write
+router.get('/analog/:pin', analogRead);
+router.patch('/analog', analogWrite);
+
+
 // LED
 router.get('/led/:p', isPinNumeric, readLed);
 router.patch('/led/:p/:a', isPinNumeric, writeLed);
@@ -35,7 +46,7 @@ router.patch('/piezo/music/', piezoPlayNotes);
 router.patch('/piezo/stop/', piezoNoTone);
 
 // for real-time communication is deprecated and not recommended
-// use other protocol like websocket instead
+// use other protocol like websocket instead, we're using socket.io
 router.patch('/servo/:p/:m', rotateServo);
 router.get('/photoresistor/:p', readResistor);