由于对象中的对象，未收到 MQTT 消息

问：

图书馆：

<PubSubClient.h>
<ESP8266WiFi.h>
"ArduinoJson.h"

当我发送此 JSON 时，会收到消息，我可以用它做一些事情：

{"topic":"domoticz/out","payload":{"Battery":255,"LastUpdate":"2022-05-13 16:28:39","Level":25,"RSSI":12,"description":"","dtype":"Color Switch","hwid":"3","id":"00082007","idx":7,"name":"test5","nvalue":15,"stype":"RGBWWZ","svalue1":"25","switchType":"Dimmer","unit":1},"qos":1,"retain":false,"_msgid":"5d58bd06fd9025a4"}

但是当我发送此消息（有效负载对象中带有 Color 对象）时，没有任何反应，没有收到消息。

{"topic":"domoticz/out","payload":{"Battery":255,"Color":{"b":33,"cw":76,"g":77,"m":4,"r":187,"t":179,"ww":180},"LastUpdate":"2022-05-13 16:31:13","Level":37,"RSSI":12,"description":"","dtype":"Color Switch","hwid":"3","id":"00082007","idx":7,"name":"test5","nvalue":15,"stype":"RGBWWZ","svalue1":"37","switchType":"Dimmer","unit":1},"qos":1,"retain":false,"_msgid":"10c972aa25ee323b"}

这是回调函数：

 void callback(char *topic, byte *payload, unsigned int length) {
        Serial.print("Message arrived in topic: ");
        Serial.println(topic);
        StaticJsonDocument<1200> doc;
        //Deserialize the JSON document
        // DeserializationError error = 
        deserializeJson(doc, payload);
        int idx = doc["idx"];
        Serial.printf("       Idx: %d",idx);

我认为这是因为对象中有一个 Color 对象。有没有办法接收此消息？

编辑： 我剥离了JSON，现在在我的Arduino中收到了一条消息。但是我仍然不能使用 Color 对象变量。

{"Color":{"b":107,"cw":76,"g":238,"m":4,"r":227,"t":179,"ww":180},"Level":49,"idx":7,"nvalue":10,"svalue1":"49"}

试：

int t = doc["Color.t"];
Serial.printf(" t: %d",t);

没用