Software:
Project Parts:
Add these libraries thru Arduino’s Library Manager:
Full Source:
#include <SPI.h>
#include <WiFi101.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>
#include <Wire.h>
#include "Adafruit_MCP9808.h"
// Create the MCP9808 temperature sensor object
Adafruit_MCP9808 MCP9808_TempSensor = Adafruit_MCP9808();
// Create a unique ID for the data from each device running this code
const char* jediID = "SAM_IOT";
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;
uint16_t Light_Sensor_Pin = A1; // select the input pin for the potentiometer
float Light_Sensor = 0; // variable to store the value coming from the sensor
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
}
delay(3000);
Serial.println("Startup - Delay USB");
if (!MCP9808_TempSensor.begin(0x18)) {
Serial.println("Couldn't find MCP9808! Check your connections and verify the address is correct.");
while (1);
}
Serial.println("Found MCP9808!");
MCP9808_TempSensor.setResolution(3); // sets the resolution mode of reading, the modes are defined in the table bellow:
// Mode Resolution SampleTime
// 0 0.5°C 30 ms
// 1 0.25°C 65 ms
// 2 0.125°C 130 ms
// 3 0.0625°C 250 ms
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while (true);
}
// 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;
MCP9808_TempSensor.wake(); // wake up, ready to read!
//Serial.println (MCP9808_TempSensor.getResolution());
float MCP9808_TempSensor_F = MCP9808_TempSensor.readTempF();
Light_Sensor = (analogRead(Light_Sensor_Pin) * 1650)/4095;
Serial.print(" | Temp[F]: ");
Serial.print(MCP9808_TempSensor_F, 4);
Serial.print(" | Light: ");
Serial.print(Light_Sensor);
Serial.println(" |");
StaticJsonDocument <200> doc;
JsonObject context = doc.createNestedObject("context");
context["target_id"] = String(jediID);
JsonObject data = doc.createNestedObject("data");
data["MCP9808"] = MCP9808_TempSensor_F;
data["TEMPT6000"] = Light_Sensor;
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 WiFi shield'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");
}