Hi and Greetings of the day.
I am trying to make IoT based Notice Board using ESP8266 and P10 board. For scrolling message i am using DMDESP library. My code is as follows
#include <WiFiClient.h>
WiFiClient ESP8266Client;
#include <ESP8266HTTPClient.h>
#include<ESP8266WiFi.h>
#include <DMDESP.h>
#include <fonts/ElektronMart6x8.h>
#include <fonts/Mono5x7.h>
#define DISPLAYS_WIDE 1
#define DISPLAYS_HIGH 1
DMDESP Disp(DISPLAYS_WIDE, DISPLAYS_HIGH);
int wifi = D0; // WiFi Onboard LED
const char* ssid = "Firoznew";
const char* password = "redrose2020";
String api = "02ac659b1bf89825135712f3772e7809ca9a4c7f";
char *Text[] = {"NodeMCU ESP8266 P10 LED Panel with DMDESP"};
String Incoming_Text = "";
void setup() {
Serial.begin(115200);
pinMode(wifi, OUTPUT);
digitalWrite(wifi, HIGH);
Disp.start();
Disp.setBrightness(40);
Disp.setFont(Mono5x7);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED)
{
Serial.println("Connecting to WiFi");
digitalWrite(wifi, LOW); // ON
delay(500);
digitalWrite(wifi, HIGH); // OFF
delay(500);
}
digitalWrite(wifi, LOW);
}
void loop() {
handle_server();
Disp.loop();
Disp.drawText(8, 0, "GPM");
Scrolling_Text(9, 100);
}
void handle_server()
{
HTTPClient http;
http.begin(ESP8266Client, "http://www.techvegan.in/iot-notice-board-api/script.php?api="+api); // Read Status from Cloud
int httpCode = http.GET();
Incoming_Text = http.getString();
Process_Incoming_Text();
httpCode=0;
Serial.flush();
http.end();
}
void Process_Incoming_Text() {
delay(500);
Serial.println("Incoming text : ");
Serial.println(Incoming_Text);
Serial.println();
int str_len = Incoming_Text.length() + 1;
char char_array[str_len];
Incoming_Text.toCharArray(char_array, str_len);
strcpy(Text[0], char_array);
//Serial.println(Text);
Incoming_Text = "";
}
void Scrolling_Text(int y, uint8_t scrolling_speed) {
static uint32_t pM;
static uint32_t x;
int width = Disp.width();
Disp.setFont(Mono5x7);
int fullScroll = Disp.textWidth(Text[0]) + width;
if((millis() - pM) > scrolling_speed) {
pM = millis();
if (x < fullScroll) {
++x;
} else {
x = 0;
return;
}
Disp.drawText(width - x, y, Text[0]);
} }
ESP8266 gets connected to wifi reads message from given URL but it doesn't display the message on P10 board. When i hide the program for HTTPClient and reading the URL, default text message appears on P10 display board. I think the problem may be in interrupt or may be in Timer. Please help.
