来自ESP8266的Firestore REST API POST请求

#include <ESP8266WiFi.h>
#include <WiFiClientSecureBearSSL.h>

const char* ssid = "YourSSID";
const char* password = "YourPassword";
const char* firestoreProjectId = "your-firestore-project-id";
const char* firestoreApiKey = "your-firestore-api-key";

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to the WiFi network");
}

void loop() {
  if (sendDataToFirestore()) {
    Serial.println("Data sent successfully!");
  } else {
    Serial.println("Failed to send data.");
  }
  delay(5000); // Send data every 5 seconds
}

bool sendDataToFirestore() {
  const char* path = "/v1/projects/";
  String url = String(path) + firestoreProjectId + "/databases/(default)/documents/sensor_data";
  
  WiFiClientSecure client;
  client.setInsecure(); // Disable SSL verification for simplicity
  
  if (!client.connect("firestore.googleapis.com", 443)) {
    Serial.println("Connection to Firestore failed");
    return false;
  }
  
  String json = "{\"field1\":\"value1\",\"field2\":2}";
  String authHeader = "Authorization: Bearer " + String(firestoreApiKey);
  String contentType = "Content-Type: application/json";
  
  client.println("POST " + url + " HTTP/1.1");
  client.println("Host: firestore.googleapis.com");
  client.println(authHeader);
  client.println(contentType);
  client.println("Content-Length: " + String(json.length()));
  client.println();
  client.println(json);
  
  while (client.connected()) {
    String line = client.readStringUntil('\n');
    if (line == "\r") {
      break;
    }
  }
  
  client.stop();
  return true;
}