Hi.
Thanks for the update.
This tutorial has not been updated for quite some time.
But, it should work with previous versions of the libraries.
Regards,
Sara

I noticed that the code in this example is a little outdated and I think it’s far too difficult for beginners to understand the errors or even adapt the code.

But first, another minor issue: the sketch often got stuck in the while(client.available()){} loop.

while (client.available()) { // ~line 117
delay(1); // ~line 118 brought more stability
c = client.read();
.
.
.

The code only runs error-free with ArduinoJson 5. Adapting it for ArduinoJson version 7 wasn’t that difficult.

For those who get the following error:
DynamicJsonBuffer is a class from ArduinoJson 5. Please see https://arduinojson.org/upgrade to learn how to upgrade your program to ArduinoJson version 7

You only need to change some lines in this function void parseJson(const char * jsonString), arround line 151. Perhaps you can copy and paste the following function in your code.

//to parse json data recieved from OWM
void parseJson(const char * jsonString) {

// deprecated code ——————————————————————
/*
//StaticJsonBuffer jsonBuffer;
const size_t bufferSize = 2JSON_ARRAY_SIZE(1) + JSON_ARRAY_SIZE(2) + 4JSON_OBJECT_SIZE(1) + 3JSON_OBJECT_SIZE(2) + 3JSON_OBJECT_SIZE(4) + JSON_OBJECT_SIZE(5) + 2JSON_OBJECT_SIZE(7) + 2JSON_OBJECT_SIZE(8) + 720;
DynamicJsonBuffer jsonBuffer(bufferSize);

// FIND FIELDS IN JSON TREE
JsonObject& root = jsonBuffer.parseObject(jsonString);
if (!root.success()) {
Serial.println(“parseObject() failed”);
return;
}

JsonArray& list = root[“list”];
JsonObject& nowT = list[0];
JsonObject& later = list[1];
*/
// deprecated code end ——————————————————————————–

// New Code ————————————————————————————————-
JsonDocument root;

DeserializationError error = deserializeJson(root, jsonString);
if (error) {
Serial.println(“deserializeJson() returned “+ String(error.c_str()));
return;
}

JsonArray list = root[“list”];
JsonObject nowT = list[0];
JsonObject later = list[1];

// New Code End —————————————————————————————–

// including temperature and humidity for those who may wish to hack it in

String city = root[“city”][“name”];

long sunrise = root[“city”][“sunrise”];
long sunset = root[“city”][“sunset”];

float tempNow = nowT[“main”][“temp”];
float humidityNow = nowT[“main”][“humidity”];
String weatherNow = nowT[“weather”][0][“description”];

float tempLater = later[“main”][“temp”];
float humidityLater = later[“main”][“humidity”];
String weatherLater = later[“weather”][0][“description”];

// checking for four main weather possibilities
diffDataAction(weatherNow, weatherLater, “clear”);
diffDataAction(weatherNow, weatherLater, “rain”);
diffDataAction(weatherNow, weatherLater, “snow”);
diffDataAction(weatherNow, weatherLater, “hail”);

Serial.println();
}

Michael,
Given that you gave your reply in 2019, I guess that is still for the ArduinJson version 5 library.
I think that for the ArduinoJson library, the entite parse section can be replaced by the following:

DynamicJsonDocument jsonDocument(capacity);
// Parse JSON
DeserializationError error = deserializeJson(jsonDocument, json);

// Check for parsing errors
if (error) {
Serial.print(“Error parsing JSON: “);
Serial.println(error.c_str());
return;
}

// Access the “id” value within the first element of the “weather” array

int list_1_weather_0_id = jsonDocument[“list”][0][“weather”][0][“id”];

I think the reading of the JSON can be simplified too (as was suggested before) by
c=client.readStringUntil(‘\n’);
but I have not tried that

Please make sure you have version 5 of the ArduinoJson library so that it is compatible with this code.
Regards,
Sara

DynamicJsonBuffer is a class from ArduinoJson 5. Please see https://arduinojson.org/upgrade to learn how to upgrade your program to ArduinoJson version 6

Can you advise how to fix this? The link they provide is not particularly helpful.

Thank you.

Thanks, Ethan. Two years later and it still works great!

Hello ULi,
You made my day ! Thank you
Ruben