Piezo buzzer, portlist and update documentation

src/setup/index.ts

@@ -1,11 +1,14 @@
 import { SuBoard } from './support';
 import { Board } from 'johnny-five';
+import { config } from 'dotenv';
 
-export const comport: string = '/dev/ttyUSB0';
-export const board: Board = new Board({
+config();
+
+export const comport: string = process.env.SERIAL_PORT || '/dev/ttyUSB0';
+export const suBoard: SuBoard = new SuBoard();
+
+export const board: Board | null = new Board({
     port: comport,
     repl: false,
     debug: false
-});
-
-export const suBoard: SuBoard = new SuBoard();
+});

src/setup/support.ts

@@ -1,4 +1,5 @@
 export interface SupportBoard {
+    port: string | null,
     connected: boolean,
     PINS: {
         pwm: number[],
@@ -8,6 +9,7 @@ export interface SupportBoard {
 }
 
 export class SuBoard implements SupportBoard {
+    public port = null;
     public connected = false;
     public PINS = {
         pwm: [],