Machinechat with Arduino UNO WiFi Rev.2

Wireless and IoT machinechat
1

Software:

Project Parts:

Add these libraries thru Arduino’s Library Manager:

Full Source:

#include <SPI.h>
#include <WiFiNINA.h>

#include "arduino_secrets.h" 
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID;        // your network SSID (name)
char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;            // your network key Index number (needed only for WEP)

#include <ArduinoJson.h>
#include <ArduinoHttpClient.h>

// Create a unique ID for the data from each device running this code
const char* jediID = "Arduino_UNO_WIFI_Rev2";

char serverAddress[] = "192.168.3.104";
int port = 8100;

// Initialize the Ethernet client library
WiFiClient wlan;
HttpClient client = HttpClient(wlan, serverAddress, port);
int status = WL_IDLE_STATUS;

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // check for the WiFi module:
  if (WiFi.status() == WL_NO_MODULE) {
    Serial.println("Communication with WiFi module failed!");
    // don't continue
    while (true);
  }

  String fv = WiFi.firmwareVersion();
  if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
    Serial.println("Please upgrade the firmware");
  }

  // attempt to connect to Wifi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);

    // wait 10 seconds for connection:
    delay(10000);
  }
  Serial.println("Connected to wifi");
  printWifiStatus();
}

void loop() {
  String postData;

  //Fake Sensor Reading
  float Fake_Sensor_tempF = 78.8;

  Serial.print(" | Temp[F]: ");
  Serial.print(Fake_Sensor_tempF, 2);
  Serial.println(" |");

  StaticJsonDocument <200> doc;
  
  JsonObject context = doc.createNestedObject("context");
  context["target_id"] = String(jediID);

  JsonObject data = doc.createNestedObject("data");
  data["Fake_tempF"] = Fake_Sensor_tempF;

  serializeJson(doc, postData);

  //This prints the JSON to the serial monitor screen
  Serial.println(postData);
  
  if (status == WL_CONNECTED) {
    String contentType = "application/json";

    client.post("/v1/data/mc", contentType, postData);

    // read the status code and body of the response
    int statusCode = client.responseStatusCode();
    String response = client.responseBody();
  
    Serial.print("Status code: ");
    Serial.println(statusCode);
    Serial.print("Response: ");
    Serial.println(response);
  }

  delay(1000);
}

void printWifiStatus() {
  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your board's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}
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