i need help to upload data from sensor to mongodb atlas using arduino uno ethernet shield i was using this code and it cann’t to connect to mongodb atlas
i was testing code with static values in currentReading & voltageReading and i’m sure make network access to 0.0.0.0/0
(databasename : HEMS
collectionname: HEMS1)
#include <SPI.h>
#include <Ethernet.h>
#include <ArduinoJson.h>
// Define your sensor pins
const int currentSensorPin = A0;
const int voltageSensorPin = A1;
// Initialize Ethernet
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
EthernetClient client;
// MongoDB cluster hostname
char hostname[] = "mongodb+srv://mongo:XXXXXXXXXX@cluster0.vkdjf70.mongodb.net"; // Change this to your cluster hostname
void setup() {
Ethernet.begin(mac);
Serial.begin(9600);
// Initialize other setup routines
}
void loop() {
// Read sensor values
int currentReading = 21;
int voltageReading = 220;
// Calculate watt
float watt = currentReading * voltageReading / 1000.0;
// Create a JSON object to hold the data
StaticJsonDocument<128> doc;
doc["Timestamp"] = millis();
doc["Current"] = currentReading;
doc["Voltage"] = voltageReading;
doc["Watt"] = watt;
// Convert JSON to string
String jsonString;
serializeJson(doc, jsonString);
// Send data to MongoDB
if (client.connect(hostname, 27017)) {
client.println("POST /HEMS.HEMS1 HTTP/1.1");
client.println("Host: " + String(hostname));
client.println("Content-Type: application/json");
client.print("Content-Length: ");
client.println(jsonString.length());
client.println();
client.println(jsonString);
client.flush(); // Flush the data
// Read the response from the server
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.print(c); // Print the response
}
}
client.stop(); // Close the connection
Serial.println("Data sent successfully!"); // Print success message
} else {
Serial.println("Error connecting to MongoDB!"); // Print error message
}
delay(1000);
}
