My ESP8266 always resatrting and printing in the serial monitor
Exception (9):
epc1=0x40213dac epc2=0x00000000 epc3=0x00000000 excvaddr=0x000001b7 depc=0x00000000
stack>>>
ctx: cont
sp: 3ffffc70 end: 3fffffc0 offset: 0190
3ffffe00: 00000000 00000000 4bc6a7f0 00000000
3ffffe10: 3ffeebf4 00000000 40100205 00000000
3ffffe20: 0000363e 3ffefc50 00001a73 00000000
3ffffe30: 000000b9 000000b9 3ffe85e4 ffffffff
3ffffe40: 0000363e 3fffff44 3ffef724 40201f20
3ffffe50: 0000012c 00000020 3ffefc4c 3ffee828
3ffffe60: 3fffdad0 00000020 3ffef724 3ffee828
3ffffe70: 3fffdad0 3fffff44 00000001 402023b9
3ffffe80: 3ffee1a0 3ffee88c 000003e8 402023ed
3ffffe90: 3fffdad0 3ffffec0 3ffee798 40202414
3ffffea0: 40206845 000000c8 3ffee798 402028d8
3ffffeb0: 3fffdad0 000000c8 3ffee798 402014b4
3ffffec0: 3fffff44 3ffef6d4 001f001f 80000000
3ffffed0: ff010050 fe001388 3ffef6fc 0011001f
3ffffee0: 80000000 70747468 00000000 04000000
3ffffef0: 3ffefd7c 0000004f 80000000 3ffefa44
3fffff00: 0011001f 80000000 00000000 40207224
3fffff10: 00000000 00000000 00000000 00000000
3fffff20: ffffffff 1db79401 00000000 3ffe000a
3fffff30: 00000000 3ffe88e4 00000000 00000001
3fffff40: 00000000 40209338 00000000 00001388
3fffff50: 00003254 00000000 00000000 3ffef724
3fffff60: 00000000 00000000 000f000f 00000000
3fffff70: 00000000 000c000f 00000000 00000000
3fffff80: 000c000f 00000000 00000000 34414238
3fffff90: 00000000 00000000 3ffee814 40100185
3fffffa0: 3fffdad0 00000000 3ffee814 402062a8
3fffffb0: feefeffe feefeffe 3ffe85e0 40100c01
<<<stack<<<
--------------- CUT HERE FOR EXCEPTION DECODER ---------------
what happen? can someone help?
the code is
#include <ESP8266WebServer.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <SPI.h>
#include <MFRC522.h>
#define SS_PIN D4
#define RST_PIN D3
MFRC522 mfrc522(SS_PIN, RST_PIN);
#define ON_Board_LED 2
const char* ssid = "Khjkul";
const char* password = "k4mpr3t4j4";
ESP8266WebServer server(80);
int readsuccess;
byte readcard[4];
char str[32] = "";
String StrUID;
void setup() {
Serial.begin(9600);
SPI.begin();
mfrc522.PCD_Init();
delay(500);
WiFi.begin(ssid, password);
Serial.println("");
pinMode(ON_Board_LED,OUTPUT);
digitalWrite(ON_Board_LED, HIGH);
Serial.print("Connecting");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
digitalWrite(ON_Board_LED, LOW);
delay(250);
digitalWrite(ON_Board_LED, HIGH);
delay(250);
}
digitalWrite(ON_Board_LED, HIGH);
Serial.println("");
Serial.print("connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
Serial.println("Tag a card");
Serial.println("");
}
void loop() {
// put your main code here, to run repeatedly
readsuccess = getid();
if(readsuccess) {
digitalWrite(ON_Board_LED, LOW);
HTTPClient http; //Declare object of class HTTPClient
WiFiClient client;
String uidSend, postData;
uidSend = StrUID;
//Post Data
postData = "uid=" + uidSend;
http.begin(client,"http://mellowed-bunk.000webhostapp.com/duino/getUID.php"); //Specify request destination
http.addHeader("Content-Type", "application/x-www-form-urlencoded"); //Specify content-type header
int httpCode = http.POST(postData); //Send the request
String payload = http.getString(); //Get the response payload
Serial.println(uidSend);
Serial.println(httpCode); //Print HTTP return code
Serial.println(payload); //Print request response payload
http.end(); //Close connection
delay(1000);
digitalWrite(ON_Board_LED, HIGH);
}
}
int getid() {
if(!mfrc522.PICC_IsNewCardPresent()) {
return 0;
}
if(!mfrc522.PICC_ReadCardSerial()) {
return 0;
}
Serial.print("THE UID IS : ");
for(int i=0;i<4;i++){
readcard[i]=mfrc522.uid.uidByte[i]; //storing the UID of the tag in readcard
array_to_string(readcard, 4, str);
StrUID = str;
}
mfrc522.PICC_HaltA();
return 1;
}
void array_to_string(byte array[], unsigned int len, char buffer[]) {
for (unsigned int i = 0; i < len; i++)
{
byte nib1 = (array[i] >> 4) & 0x0F;
byte nib2 = (array[i] >> 0) & 0x0F;
buffer[i*2+0] = nib1 < 0xA ? '0' + nib1 : 'A' + nib1 - 0xA;
buffer[i*2+1] = nib2 < 0xA ? '0' + nib2 : 'A' + nib2 - 0xA;
}
buffer[len*2] = '\0';
}
here is what i get when i use ESP Exception decoder
Decoding stack results
0x40100205: millis() at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\core_esp8266_wiring.cpp line 193
0x40201f20: ClientContext::wait_until_acked(int) at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WiFi\src/include/ClientContext.h line 347
0x402023b9: WiFiClient::flush(unsigned int) at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WiFi\src\WiFiClient.cpp line 311
0x402023ed: WiFiClient::stop(unsigned int) at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WiFi\src\WiFiClient.cpp line 319
0x40202414: WiFiClient::stop() at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266WiFi\src/WiFiClient.h line 75
0x40206845: __delay(unsigned long) at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\core_esp8266_wiring.cpp line 55
0x402028d8: HTTPClient::~HTTPClient() at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\libraries\ESP8266HTTPClient\src\ESP8266HTTPClient.cpp line 60
0x402014b4: loop() at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266/WString.h line 79
0x40207224: uart_write(uart_t*, char const*, size_t) at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\uart.cpp line 546
0x40100185: esp_schedule() at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\core_esp8266_main.cpp line 128
0x402062a8: loop_wrapper() at C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.0.2\cores\esp8266\core_esp8266_main.cpp line 201
