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希望有人能帮我解决我的问题。我尝试使用 V2 API 将我的 ESP32 连接到我的 HUE 集线器。连接到集线器工作正常，输出 USE_SERIAL.write(buff, c);)也工作正常。但是我的 StaticJsonDocument 仍然是空的，我没有发现问题。

#include <Arduino.h>

#include <WiFi.h>
#include <WiFiMulti.h>
#include <ArduinoJson.h>
#include <StreamUtils.h>
#include <HTTPClient.h>

#define USE_SERIAL Serial

WiFiMulti wifiMulti;

void setup() {

    USE_SERIAL.begin(115200);

    USE_SERIAL.println();
    USE_SERIAL.println();
    USE_SERIAL.println();

    for(uint8_t t = 4; t > 0; t--) {
        USE_SERIAL.printf("[SETUP] WAIT %d...\n", t);
        USE_SERIAL.flush();
        delay(1000);
    }

    wifiMulti.addAP("xxx", "xxx");

}

void loop() {
    // wait for WiFi connection
    if((wifiMulti.run() == WL_CONNECTED)) {

        HTTPClient http;

        USE_SERIAL.print("[HTTP] begin...\n");

        // configure server and url
        http.begin("https://192.168.2.13/eventstream/clip/v2");
        http.addHeader("hue-application-key", "xxx");
        http.addHeader("Accept", "vtext/event-stream");

        USE_SERIAL.print("[HTTPS] GET...\n");
        // start connection and send HTTP header
        int httpCode = http.GET();
        if(httpCode > 0) {
            // HTTP header has been send and Server response header has been handled
            USE_SERIAL.printf("[HTTP] GET... code: %d\n", httpCode);

            // file found at server
            if(httpCode == HTTP_CODE_OK) {

                // get lenght of document (is -1 when Server sends no Content-Length header)
                int len = http.getSize();

                // create buffer for read
                uint8_t buff[128] = { 0 };

                // get tcp stream
                WiFiClient * stream = http.getStreamPtr();

                StaticJsonDocument<384> doc;

                // read all data from server
                while(http.connected() && (len > 0 || len == -1)) {
                    // get available data size
                    size_t size = stream->available();

                    if(size) {
                        
                        int c = stream->readBytes(buff, ((size > sizeof(buff)) ? sizeof(buff) : size));

                        USE_SERIAL.write(buff, c);
                        
                        deserializeJson(doc, buff);
                        
                        const char* creationtime = doc["creationtime"]; // "2022-02-23T10:42:26Z"
                        
                        JsonObject data_0 = doc["data"][0];
                        const char* data_0_id = data_0["id"]; // "4317f73c-7d20-4a02-b3ee-70e1c8e108e2"
                        const char* data_0_id_v1 = data_0["id_v1"]; // "/groups/10"
                        
                        bool data_0_on_on = data_0["on"]["on"]; // true
                        
                        const char* data_0_type = data_0["type"]; // "grouped_light"
                        
                        const char* id = doc["id"]; // "0dfe6163-346a-4d6f-88d7-53ca1e3b142a"
                        const char* type = doc["type"]; // "update"

                        

                        if(len > 0) {
                            len -= c;
                        }
                    }
                    delay(1);
                }

                USE_SERIAL.println();
                USE_SERIAL.print("[HTTP] connection closed or file end.\n");

            }
        } else {
            USE_SERIAL.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
        }

        http.end();
    }

    delay(10000);
}

deserializeJson 有问题吗？或者我的推理哪里错了？

感谢 gre_gor 的有用评论。现在，我发现 JSON 输入无效（DeserializationError::InvalidInput）。这是 SerialPrint - 输出的示例：

11:44:48.282 -> id: 1645699488:0

11:44:48.282 -> data: [{"creationtime":"2022-02-24T10:44:48Z","data":[{"id":"0659c643-e965-49d2-9653-eba02e6495e8","id_v1":"/sensors/28","motion":{"motion":false,"motion_valid":true},"owner":{"rid":"116ac210-b979-4644-a32d-edc82c1bf09f","rtype":"device"},"type":"motion"}],"id":"259793ec-5e16-4981-81bf-0d5eb233eca0","type":"update"}]

应该是有效的 JSON，还是？

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