Ecowitt sensor data to esp32 with integrated E-ink display

Using Arduino Programming Questions
1

Hello, I am trying to get sensor data from an ecowitt webpage to an esp32 with integrated e-ink display ( https://soldered.com/product/soldered-inkplate-5-5-2″-e-paper-board/).

I use the following code but the display just shows connected to WIFI with an IP address.

Any help appreciated

PXL_20240822_162503123
PXL_20240822_1625031231920×1446 147 KB

#include <WiFi.h>
#include <HTTPClient.h>
#include <Arduino_JSON.h>
#include <Inkplate.h>

// Create an Inkplate object for display (use INKPLATE_1BIT for monochrome mode)
Inkplate display(INKPLATE_1BIT);

const char* ssid = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";

// Your server details with URL path
const char* serverName = "http://192.168.1.106:1880/get-sensor";

// Username and Password for HTTP Basic Authentication
const char* serverUsername = "YOUR_USERNAME";
const char* serverPassword = "YOUR_PASSWORD";

// Timer variables
unsigned long lastTime = 0;
unsigned long timerDelay = 5000; // Set timer to 5 seconds

String sensorReadings;
float sensorReadingsArr[3];  // Array to store parsed sensor readings

void setup() {
  Serial.begin(115200);

  // Initialize the Inkplate display
  display.begin();
  display.clearDisplay();
  display.display();  // Refresh the display to clear any previous data
  
  // Display a message indicating the connection process
  display.setTextSize(3);  // Set a larger font size
display.setTextColor(BLACK, WHITE);
  display.setCursor(50, 50);
  display.print("Connecting to WiFi...");
  display.display();  // Show the message on the e-paper display
  
  // Connecting to WiFi
  WiFi.begin(ssid, password);
  Serial.println("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi with IP Address: ");
  Serial.println(WiFi.localIP());

  // Update display with the IP Address
  display.clearDisplay();
  display.setCursor(50, 50);
  display.print("Connected to WiFi!");
  display.setCursor(50, 100);
  display.print("IP: ");
  display.print(WiFi.localIP().toString());  // Display IP address
  display.display();  // Update the display

  Serial.println("Timer set to 5 seconds (timerDelay variable).");
}

void loop() {
  // Send an HTTP GET request every 5 seconds
  if ((millis() - lastTime) > timerDelay) {
    // Check WiFi connection status
    if (WiFi.status() == WL_CONNECTED) {
      sensorReadings = httpGETRequest(serverName, serverUsername, serverPassword);  // Fetch sensor data with auth
      Serial.println(sensorReadings);

      JSONVar myObject = JSON.parse(sensorReadings);  // Parse JSON response

      if (JSON.typeof(myObject) == "undefined") {
        Serial.println("Parsing input failed!");
        return;
      }

      // Print the full JSON object to Serial
      Serial.print("JSON object = ");
      Serial.println(myObject);

      // Get keys of the JSON object
      JSONVar keys = myObject.keys();
    
      for (int i = 0; i < keys.length(); i++) {
        JSONVar value = myObject[keys[i]];
        Serial.print(keys[i]);
        Serial.print(" = ");
        Serial.println(value);
        sensorReadingsArr[i] = double(value);  // Store each sensor reading in array
      }

      // Print each sensor reading to Serial
      Serial.print("Sensor 1 = ");
      Serial.println(sensorReadingsArr[0]);
      Serial.print("Sensor 2 = ");
      Serial.println(sensorReadingsArr[1]);
      Serial.print("Sensor 3 = ");
      Serial.println(sensorReadingsArr[2]);

      // Update the Inkplate display with sensor data
      display.clearDisplay();  // Clear the screen before displaying new data
      display.setCursor(50, 50);
      display.print("Sensor 1 (Temp): ");
      display.print(sensorReadingsArr[0]);
      display.print(" C");

      display.setCursor(50, 100);
      display.print("Sensor 2 (Humidity): ");
      display.print(sensorReadingsArr[1]);
      display.print(" %");

      display.setCursor(50, 150);
      display.print("Sensor 3 (Pressure): ");
      display.print(sensorReadingsArr[2]);
      display.print(" hPa");

      display.display();  // Refresh the display to show updated data
    } else {
      Serial.println("WiFi Disconnected");
      // Display WiFi disconnected message on Inkplate
      display.clearDisplay();
      display.setCursor(50, 50);
      display.print("WiFi Disconnected");
      display.display();
    }

    lastTime = millis();  // Update lastTime
  }
}

// Function to make HTTP GET request with username and password
String httpGETRequest(const char* serverName, const char* username, const char* password) {
  WiFiClient client;
  HTTPClient http;

  http.begin(client, serverName);  // Initialize HTTP connection
  
  // Set basic authentication credentials
  http.setAuthorization(username, password);

  int httpResponseCode = http.GET();  // Send GET request
  
  String payload = "{}";  // Default empty payload in case of failure
  
  if (httpResponseCode > 0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    payload = http.getString();  // Get the response as a string
  } else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
  }

  http.end();  // Free resources
  
  return payload;
}
2

Your httpGETRequest function returns a String object and you're trying to assign that to an array of float. How is that supposed to work? It shouldn't even compile.

3

I have no experience in Arduino programming and used chat GPT to compile the code as I said any help appreciated, thank you.

4

Chat GPT gave you a load of crap. I know nothing of Ecowitt's API or it's data format, but I know that code won't do it. Perhaps someone else on the forum is familiar with Ecowitt, but I've never seen it mentioned here.