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Code for IoT Device

+//pins used for sensors
+#define trigPin 12 
+#define echoPin 13 
+#define fsrpin A1  
+ 
+#include <SPI.h>
+#include <WiFiNINA.h>
+#include <ThingSpeak.h>
+#include <SoftwareSerial.h>
+ 
+ SoftwareSerial Bluetooth (0,1);
+ 
+ 
+int redLed = 2; // Set green LED to pin 3, red to pin 2
+ 
+int fsrreading = 0;
+ 
+int bluetoothinput; 
+ 
+// wifi connection
+ 
+// with reference to The Internet of Things 3CB105 Week 6 Lecture "Arduino Uno WiFi connection"
+ 
+const char ssid[] = "TALKTALKE2531E";
+const char pass[] = "WB8WH3H7";
+ 
+const unsigned long channel_id = 1592248;
+const char write_api_key[] = "VN2B96JBUY6HUPX7";
+ 
+WiFiClient client;
+ 
+ 
+void setup() {
+ 
+ 
+int status = WL_IDLE_STATUS;
+Bluetooth.begin (9600);
+
+
+Bluetooth.println("Attempting to connect.");
+status = WiFi.begin(ssid,pass);
+if (status != WL_CONNECTED) {
+  Bluetooth.println("Not connected, try again.");
+  while (true);
+}
+else{
+  Bluetooth.print("Connected to ");
+  Bluetooth.println(ssid);
+  Bluetooth.print("with IP address: ");
+  Bluetooth.println(WiFi.localIP());
+  ThingSpeak.begin(client);
+}
+ pinMode(trigPin, OUTPUT);
+pinMode(echoPin, INPUT);
+ pinMode(redLed, OUTPUT);
+ 
+ Bluetooth.println ("Bluetooth connected, please press 0 to turn off, or press 1 to get last reading: ");
+ Bluetooth.println("Distance and Force readings from your device: ");
+
+ }
+void loop() {
+ 
+delay(500);
+ 
+//bluetooth connection - with reference to https://gist.github.com/ashinjohn/9fcc9362dc4787ae08c030c2e7401f4c - accessed on 11/12/2021 
+ 
+if (Bluetooth.available()){
+  bluetoothinput = Bluetooth.read();
+    if (bluetoothinput == '0'){
+    Bluetooth.println("Device turned off, please reset device to start again");
+    exit(0);
+    
+    }
+}
+// programmed Ultrsonic sensor with reference to - https://create.arduino.cc/projecthub/MisterBotBreak/how-to-use-an-ultrasonic-sensor-181cee
+// code to turn on and off the sound and work out the distance by multiplying by 0.034 and dividing by 2
+ delay(100);
+int duration, distance = 0, i;
+digitalWrite(trigPin, LOW);
+delayMicroseconds(2);
+digitalWrite(trigPin, HIGH); // Trig pin sends a ping
+delayMicroseconds(10);
+digitalWrite(trigPin, LOW);
+duration = pulseIn(echoPin, HIGH); // Echo receives the ping
+//distance = (duration / 2) / 29.1;
+distance = duration * 0.034 / 2;
+Bluetooth.println("");
+Bluetooth.println("Distance = " + String(distance) ); //print the distance
+if (distance > 10){
+  Bluetooth.println();
+  Bluetooth.println();
+  Bluetooth.println();
+  Bluetooth.println("Sit back!");
+  Bluetooth.println();
+  Bluetooth.println();
+  Bluetooth.println();
+}
+ 
+ 
+//FSR code with reference to - https://www.makerguides.com/fsr-arduino-tutorial/
+fsrreading = analogRead(fsrpin); //read pin
+Bluetooth.println("Force Reading = " + String(fsrreading)); //print the force
+ 
+// show different wording depending on the force read to compare different levels
+// the wording has now beeen shortened so not much is shown on the tera term unless important
+// readings starting at 90 as there is a slight amount of pressure felt by the fsr with no touch.
+if (fsrreading <= 90) {
+    Bluetooth.println();
+    Bluetooth.println();
+    Bluetooth.println();
+    Bluetooth.println("Not being touched! Sort out your posture");
+    Bluetooth.println();
+    Bluetooth.println();
+    Bluetooth.println();
+  } 
+  
+  Bluetooth.println("Posting " + String(fsrreading) + " to ThingSpeak"); // declare posting pressure to thingspeak
+  ThingSpeak.setField(2, String(fsrreading));
+  ThingSpeak.writeFields(channel_id,write_api_key); //post to thingspeak
+ 
+ // If sensor detects object further than 8 cm or a force less than 200 then the LED will turn on
+// to show that the posture is not good 
+ if (distance >= 10 || fsrreading <= 90) { 
+ 
+ 
+ digitalWrite(redLed, HIGH); // Turn on red LED
+delay(500);
+ 
+ 
+}
+// else
+else { 
+ digitalWrite(redLed, LOW); // Turn off red LED
+ 
+ }
+delay(2000); //delay before collecting the next set of data
+ 
+}
+
+
+ 
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