How to check integrity of esp8266
Posted: Sat May 20, 2017 10:14 pmHello,
I want to flash my ESP-12-E module with Arduino IDE, but it seems that something went wrong...
Some time ago everything worked fine.
I use PL-2303 as TTL converter to flash ESP module.
ESP ------ PL (connection)
VCC ------ 3.3V
CH_PD --- 3.3V
TX ------- RX
RX ------- TX
GPIO0 --- GND
GND ----- GND
Now Iam trying to test serial communication via Arduino monitor.
Here is my code sample:
First 2 times there was propper response via serial monitor in Arduino IDE (something like that: 0,0,0 e.t.c), but now it doesn't work.
Maybe I'm doing something wrong?
There is some messadge appears continuously in serial monitor right after flashing:
Fatal exception (0):
epc1=0x40217d24, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
What doest it mean?
Then if I detach GPIO0 -> GND connection to switch off the programming state and power on again it starts to display incomprehensible characters in one line.
Plz, help me
I want to flash my ESP-12-E module with Arduino IDE, but it seems that something went wrong...
Some time ago everything worked fine.
I use PL-2303 as TTL converter to flash ESP module.
ESP ------ PL (connection)
VCC ------ 3.3V
CH_PD --- 3.3V
TX ------- RX
RX ------- TX
GPIO0 --- GND
GND ----- GND
Now Iam trying to test serial communication via Arduino monitor.
Here is my code sample:
Code: Select all
#include <ESP8266WiFi.h>
void setup() {
// start serial port at 115200 bps and wait for port to open:
Serial.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
establishContact(); // send a byte to establish contact until receiver responds
}
void loop() {
// if we get a valid byte, read analog ins:
if (Serial.available() > 0) {
if (Serial.read() == 'Hello') {
Serial.print(" World!");
Serial.println("----------------");
}
}
}
void establishContact() {
while (Serial.available() <= 0) {
Serial.println("0,0,0"); // send an initial string
delay(1000);
}
}
First 2 times there was propper response via serial monitor in Arduino IDE (something like that: 0,0,0 e.t.c), but now it doesn't work.
Maybe I'm doing something wrong?
There is some messadge appears continuously in serial monitor right after flashing:
Fatal exception (0):
epc1=0x40217d24, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
What doest it mean?
Then if I detach GPIO0 -> GND connection to switch off the programming state and power on again it starts to display incomprehensible characters in one line.
Plz, help me