我用我的 NodeMCU Mx 和 ESP8266 做了一个小项目,但是 ArduinoJson lib 告诉我有一个错误。我只想在我的 json 文件中获取数据并将数据用作变量,以便将其打印在 LCD 显示器上。它一开始可以工作,但现在它总是会犯同样的错误,即使我重新编译并将其传输到我的 nodemcu 中。
编码 :
#include <ArduinoJson.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>
String payload = "";
void setup()
{
//CONNEXION AU WIFI
Serial.begin(9600);
pinMode(LED_BUILTIN, OUTPUT);
WiFi.begin("test", "testtest");
while (WiFi.status() != WL_CONNECTED) {
digitalWrite(LED_BUILTIN, LOW);
delay(100);
digitalWrite(LED_BUILTIN, HIGH);
delay(100);
}
Serial.println("Connected !");
delay(1000);
Serial.print("Local IP:");
Serial.println((WiFi.localIP().toString()));
Serial.print("Mac adress :");
Serial.println((WiFi.macAddress().c_str()));
Serial.print("Hostname :");
Serial.println((WiFi.hostname()));
//LED ALWAYS ON
digitalWrite(LED_BUILTIN, LOW);
}
void loop() {
if (WiFi.status() == WL_CONNECTED) { //Check WiFi connection status
HTTPClient http; //Declare an object of class HTTPClient
http.begin("http://latin-american-brea.000webhostapp.com/dan.json"); //Specify request destination
http.addHeader("Content-Type", "text/html");
int httpCode = http.GET(); //Send the request
if (httpCode > 0) { //Check the returning code
String payload = http.getString(); //Get the request response payload
Serial.println(payload); //Print the response payload
// Stream& input;
StaticJsonDocument<96> doc;
DeserializationError error = deserializeJson(doc, payload);
if (error) {
Serial.print(F("deserializeJson() failed: "));
Serial.println(error.f_str());
return;
}
const char* fruit = doc["fruit"]; // "Apple"
const char* sizz = doc["sizz"]; // "Large"
const char* color = doc["color"]; // "Red"
Serial.println(fruit);
} else {
Serial.println("Marche pas");
}
http.end(); //Close connection
}
Serial.println(payload);
delay(30000); //Send a request every 30 seconds
}
这是错误:
deserializeJson() failed: NoMemory
我真的不明白,请有人帮助我吗?谢谢!