mirror of
https://github.com/eledio-devices/thirdparty-ArduinoJson.git
synced 2025-10-31 16:14:11 +01:00
109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
// ArduinoJson - arduinojson.org
|
|
// Copyright Benoit Blanchon 2014-2018
|
|
// MIT License
|
|
//
|
|
// This example shows how to implement an HTTP server that sends JSON document
|
|
// in the responses.
|
|
// It uses the Ethernet library but can be easily adapted for Wifi.
|
|
//
|
|
// It sends the value of the analog and digital pins.
|
|
// The JSON document looks like the following:
|
|
// {
|
|
// "analog": [ 0, 1, 2, 3, 4, 5 ],
|
|
// "digital": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 ]
|
|
// }
|
|
|
|
#include <ArduinoJson.h>
|
|
#include <Ethernet.h>
|
|
#include <SPI.h>
|
|
|
|
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
|
|
EthernetServer server(80);
|
|
|
|
void setup() {
|
|
// Initialize serial port
|
|
Serial.begin(9600);
|
|
while (!Serial) continue;
|
|
|
|
// Initialize Ethernet libary
|
|
if (!Ethernet.begin(mac)) {
|
|
Serial.println(F("Failed to initialize Ethernet library"));
|
|
return;
|
|
}
|
|
|
|
// Start to listen
|
|
server.begin();
|
|
|
|
Serial.println(F("Server is ready."));
|
|
Serial.print(F("Please connect to http://"));
|
|
Serial.println(Ethernet.localIP());
|
|
}
|
|
|
|
void loop() {
|
|
// Wait for an incomming connection
|
|
EthernetClient client = server.available();
|
|
|
|
// Do we have a client?
|
|
if (!client) return;
|
|
|
|
Serial.println(F("New client"));
|
|
|
|
// Read the request (we ignore the content in this example)
|
|
while (client.available()) client.read();
|
|
|
|
// Allocate JsonBuffer
|
|
// Use arduinojson.org/assistant to compute the capacity.
|
|
StaticJsonBuffer<500> jsonBuffer;
|
|
|
|
// Create the root object
|
|
JsonObject& root = jsonBuffer.createObject();
|
|
|
|
// Create the "analog" array
|
|
JsonArray& analogValues = root.createNestedArray("analog");
|
|
for (int pin = 0; pin < 6; pin++) {
|
|
// Read the analog input
|
|
int value = analogRead(pin);
|
|
|
|
// Add the value at the end of the array
|
|
analogValues.add(value);
|
|
}
|
|
|
|
// Create the "digital" array
|
|
JsonArray& digitalValues = root.createNestedArray("digital");
|
|
for (int pin = 0; pin < 14; pin++) {
|
|
// Read the digital input
|
|
int value = digitalRead(pin);
|
|
|
|
// Add the value at the end of the array
|
|
digitalValues.add(value);
|
|
}
|
|
|
|
Serial.print(F("Sending: "));
|
|
root.printTo(Serial);
|
|
Serial.println();
|
|
|
|
// Write response headers
|
|
client.println("HTTP/1.0 200 OK");
|
|
client.println("Content-Type: application/json");
|
|
client.println("Connection: close");
|
|
client.println();
|
|
|
|
// Write JSON document
|
|
root.prettyPrintTo(client);
|
|
|
|
// Disconnect
|
|
client.stop();
|
|
}
|
|
|
|
// See also
|
|
// --------
|
|
//
|
|
// The website arduinojson.org contains the documentation for all the functions
|
|
// used above. It also includes an FAQ that will help you solve any
|
|
// serialization problem.
|
|
// Please check it out at: https://arduinojson.org/
|
|
//
|
|
// The book "Mastering ArduinoJson" contains a tutorial on serialization.
|
|
// It begins with a simple example, then adds more features like serializing
|
|
// directly to a file or an HTTP client.
|
|
// Please check it out at: https://arduinojson.org/book/
|