现在arduinojson更新到了v6，v5的代码似乎不能继续用了

[ningbolaoyao]

举个例子，如何在v6代码中如何提取json中的city字符串，然后直接让墨水屏显示呢， 墨水屏显示代码如下 void displaytext(){ display.init(115200); display.setRotation(0); u8g2Fonts.begin(display); display.firstPage(); uint8_t SCREEN_WIDTH=400; do { u8g2Fonts.setBackgroundColor(0xff); u8g2Fonts.setForegroundColor(0x00); u8g2Fonts.setFont(u8g2_mfyuanhei_16_gb2312); u8g2Fonts.drawUTF8(250, 150, “测试”); }

while (display.nextPage()); display.hibernate(); } 以下是我的获取json的代码 HTTPClient http; WiFiClient wifiClient; if (WiFi.status() == WL_CONNECTED){ http.begin(wifiClient,"http://whois.pconline.com.cn/ipJson.jsp?ip=xxx.xxx.xxx.xxx&json=true"); int httpCode = http.GET(); Serial.print(httpCode); http.setUserAgent("Mozilla/5.0 (Windows NT 11.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.82 Safari/537.36"); if (httpCode==HTTP_CODE_OK) { String respone = http.getString(); StaticJsonDocument<384> doc; DeserializationError error = deserializeJson(doc, respone); if (error) { Serial.print(F("deserializeJson() failed: ")); Serial.println(error.f_str()); return ; } const char* ip = doc["ip"]; // "202.101.102.194" const char* pro = doc["pro"]; // "福建省" const char* proCode = doc["proCode"]; // "350000" const char* city = doc["city"]; // "福州市" const char* cityCode = doc["cityCode"]; // "350100" const char* region = doc["region"]; // nullptr const char* regionCode = doc["regionCode"]; // "0" const char* addr = doc["addr"]; // "福建省福州市 电信" const char* regionNames = doc["regionNames"]; // nullptr const char* err = doc["err"]; // nullptr http.end(); }