Hi all,
I'm working on a project using a Wemos D1 mini with 4 LEDs in series. The aim is to get it to read text from a web page which only has text on stating 1, 2 or 3 colours, and then replicate those colours across the LEDs. The webpage is created using NodeRed to extract information from a website. I've got code from a similar project which I'm using, but I think some of it may be outdated based on old ArduinoJSON. When I try and upload the code to the Arduino I get the following errors:
`Arduino: 1.8.16 (Windows Store 1.8.51.0) (Windows 10), Board: "LOLIN(WEMOS) D1 R2 & mini, 80 MHz, Flash, Disabled (new aborts on oom), Disabled, All SSL ciphers (most compatible), 32KB cache + 32KB IRAM (balanced), Use pgm_read macros for IRAM/PROGMEM, 4MB (FS:2MB OTA:~1019KB), v2 Lower Memory, Disabled, None, Only Sketch, 115200"
C:\Users\M\Desktop\Bindicator.ino: In function 'void loop()':
Bindicator:74:38: error: 'class ArduinoJson6185_91::StaticJsonDocument<300>' has no member named 'parseArray'
74 | JsonArray& parsed = JSONBuffer.parseArray(parseMe);
| ^~~~~~~~~~
Bindicator:77:19: error: 'ArduinoJson::JsonArray' {aka 'class ArduinoJson6185_91::ArrayRef'} has no member named 'success'
77 | if (!parsed.success()) {
| ^~~~~~~
Bindicator:91:19: error: 'class ArduinoJson6185_91::ElementProxy<ArduinoJson6185_91::ArrayRef>' has no member named 'printTo'
91 | parsed[i].printTo((char*)jsonChar, parsed.measureLength() + 1);
| ^~~~~~~
Bindicator:91:51: error: 'ArduinoJson::JsonArray' {aka 'class ArduinoJson6185_91::ArrayRef'} has no member named 'measureLength'
91 | parsed[i].printTo((char*)jsonChar, parsed.measureLength() + 1);
| ^~~~~~~~~~~~~
exit status 1
'class ArduinoJson6185_91::StaticJsonDocument<300>' has no member named 'parseArray'
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
`
The code I'm using in IDE is:
#include <ESP8266WiFi.h>
#include <ESP8266mDNS.h>
#include <WiFiUdp.h>
#include <Adafruit_NeoPixel.h>
#include <ESP8266HTTPClient.h>
#include <ArduinoJson.h>
// Change to suit your number of pixels and output pin on the ESP8266
#define PIN D3
#define NUMPIXELS 4
// Change to add in your WiFi SSID, Password & NODE_RED Server IP
const char* NODE_RED_HOST_IP = "http://XXX.XXX.X.XX:1880/endpoint/mybin";
const char* ssid = "XXXXXX";
const char* password = "XXXXXXXX";
// Adafruit NeoPixel initilisation string
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
// Define some standard colours for easier reference later
const uint32_t redPixel = pixels.Color(255, 0, 0);
const uint32_t greenPixel = pixels.Color(0, 255, 0);
const uint32_t bluePixel = pixels.Color(0, 0, 255);
const uint32_t whitePixel = pixels.Color(255, 255, 255);
const uint32_t unlitPixel = pixels.Color(0, 0, 0);
const uint32_t dimWhitePixel = pixels.Color(255, 255, 255);
void setup() {
// Boot up ESP8266, setup serial comms and try to connect to wifi
Serial.begin(115200);
Serial.println("Booting Up");
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.println("Connection to WiFi Failed! Retrying...");
delay(5000);
}
// Set LED colour to dim white when booted and connected to your wifi with a valid IP, print the IP to serial
Serial.print("IP Address:");
Serial.println(WiFi.localIP());
pixels.begin();
pixels.setPixelColor(0, dimWhitePixel);
pixels.show();
}
void loop() {
// Connect to the NODE_RED server and pull a result, show red LED if this fails
HTTPClient http;
const int httpPort = 1880;
// Connect to the NODE_RED bins webpage, change to suit your IP and Bins webpage address
if (! http.begin("http://XXX.XXX.X.XX:1880/endpoint/mybin" )) {
Serial.println("Connection Failed To " + String(NODE_RED_HOST_IP));
// If we cant connect, show 1 pixel red to indicate an error
pixels.setPixelColor(0, redPixel);
} else {
// If we can connect to NODE_RED, start a pull of data from NODE_RED server
Serial.print("Doing Get: ");
int httpCode = http.GET();
Serial.printf("[HTTP] GET... code: %d\n", httpCode);
// Check we're getting a HTTP Code 200
if (httpCode = HTTP_CODE_OK) {
String parseMe = http.getString();
//Create a memory buffer to store the JSON data
StaticJsonDocument<300> JSONBuffer;
JsonArray& parsed = JSONBuffer.parseArray(parseMe);
// If we can connect to NODE_RED, but dont understand the returned data, set 1 pixel to red and output to serial
if (!parsed.success()) {
Serial.println("Parsing JSON Failed");
pixels.setPixelColor(0, redPixel);
pixels.show();
delay(5000);
return;
}
int arraySize = parsed.size();
int pixelIndex = 0;
static uint32_t lastColour = unlitPixel;
for (int i = 0; i < arraySize; i++) {
char jsonChar[10];
parsed[i].printTo((char*)jsonChar, parsed.measureLength() + 1);
// Parse retreived data and check for for matching colours. If webpage says Green, show Green LED, if Red, show Red, etc
if (strcmp(jsonChar, "green") == 0 ) {
pixels.setPixelColor(pixelIndex, greenPixel);
lastColour = greenPixel;
Serial.println("Set To Green");
}
if (strcmp(jsonChar, "red") == 0 ) {
pixels.setPixelColor(pixelIndex, redPixel);
lastColour = redPixel;
Serial.println("Set To Red");
}
if (strcmp(jsonChar, "blue") == 0 ) {
pixels.setPixelColor(pixelIndex, bluePixel);
lastColour = bluePixel;
Serial.println("Set To Blue");
}
if (strcmp(jsonChar, "white") == 0 ) {
pixels.setPixelColor(pixelIndex, whitePixel);
lastColour = whitePixel;
Serial.println("Set To White");
}
pixelIndex++;
}
// If only one bin value is found, repeat colour so whole bin lights up
if (arraySize ==1) {
for (int i = 0; i < NUMPIXELS; i++) {
pixels.setPixelColor(pixelIndex, lastColour);
}
}
}
// Clean up your HTTP connection to prevent memory leaks or other weird behaviour
Serial.println();
Serial.println("Closing Connection");
http.end();
pixels.show();
// This is how often we check the NODE_RED server. Set to something low, like 3000 for testing and perhaps 30000 or 60000 for "Production" use
delay(3000);
}
}
Can anyone please advise on what needs to be edited to resolve the errors?
Thanks in advance