Update

Took 10 minutes

arduino/itender/.theia/launch.json

@@ -0,0 +1,8 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  "version": "0.2.0",
+  "configurations": [
+    
+  ]
+}

arduino/itender/itender.ino

@@ -2,13 +2,25 @@
 * Official proxy code for iTender GPIO Communication
 **/
 
+#include "HX711.h"
+#include <ArduinoJson.h>
+
+DynamicJsonDocument<200> doc;
 
 void setup() {
-  // put your setup code here, to run once:
   Serial.begin(9600);
+
+  while (!Serial) continue;
+
+
 }
 
+
+
 void loop() {
-  // put your main code here, to run repeatedly:
+  if( Serial.available() > 0 )
+  {
+    String data = Serial.readString();
     
   }
+}

arduino/itender/tare.ino

@@ -0,0 +1,43 @@
+/**
+
+#include "HX711.h"
+
+const int LOADCELL_DOUT_PIN = 2;
+const int LOADCELL_SCK_PIN = 3;
+
+HX711 scale;
+
+int minus = 0;
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+  delay(1000);
+  Serial.println("TARE");
+  
+  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
+  scale.set_scale(429.6159259259259);
+  scale.tare();
+  
+  delay(1000);
+  minus=abs(scale.get_units(5));
+  // scale.set_scale();
+  // scale.tare();
+  // Serial.println("TARE OK - PLACE WEIGHT");
+  //delay(5000);
+}
+
+int len = 0;
+long sum = 0;
+
+void loop() {
+  if (scale.is_ready()) {
+    long data = scale.get_units(5) + minus;
+    Serial.println(data);
+   
+  } 
+  
+}
+
+
+**/

doc/installPi.sh

@@ -58,6 +58,10 @@ sudo -u itender mkdir -p /home/itender/bin
 sudo -u itender sh -c 'curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR=/home/itender/bin/ sh'
 sudo -u itender /home/itender/bin/arduino-cli config init
 sudo -u itender /home/itender/bin/arduino-cli core update-index || true
+sudo -u itender /home/itender/bin/arduino-cli lib search ArduinoJson || true
+sudo -u itender /home/itender/bin/arduino-cli lib install ArduinoJson || true
+
+
 
 echo "Installing autostart..."
 # Autostart

src/database/Database.ts

@@ -4,30 +4,25 @@ import Ingredient from "./Ingredient";
 import Drink from "./Drink";
 import Container from "./Container";
 
+// create a namespace for logging
 const log = debug("itender:server");
 
 export class Database {
+    //  method to connect to the database
     public static connect(): Promise<void> {
         return new Promise(async (resolve, reject) => {
             try {
+                //connect to mongodb using mongoose
                 await Mongoose.connect("mongodb://127.0.0.1:27017/iTender?retryWrites=true");
                 log("Connected to Database");
-                /*if (Mongoose.connection.readyState == Mongoose.ConnectionStates.connected) {
-                    resolve();
-                } else {
-                    reject("Can't connect to database");
-                }*/
-
-                // Preload schemes
+                // Preload the schema for Ingredient, Drink and Container
                 Ingredient.find();
                 Drink.find();
                 Container.find();
-
                 resolve();
             } catch (e) {
                 reject("Exception whilst connecting to Database " + e);
             }
-
         });
     }
 }