I am attempting to flash an ESP8266EX that is built into an Arduino Mega board. I have 2 boards, both from factory I connect with a serial terminal (at 74880 baud chip default rate) and get the error message:
ets Jan 8 2013,rst cause:2, boot mode:(3,6) load 0x4010f000, len 1384, room 16 tail 8 chksum 0x2d csum 0x2d v00000000 ~ld
I understand the firmware on the chip from factory should allow me to connect at 115200 and communicate using AT commands.
I have successfully flashed the firmware onto one of the boards using the Arduino IDE and the code below to create a wifi network that I can connect to with my phone, so I know at least one of the boards works, (just not with factory firmware?)
// Set the DIP switches on the actual board to 1=OFF 2=OFF 3=OFF 4=OFF 5=ON 6=ON 7=ON 8=OFF
//(USBESP8266 (Update firmware or sketch))
//Under Tools select Board then select the Generic esp8266 Module
//Paste the following sketch into the IDE, save and upload
// Create a WiFi access point and provide a web server on it.
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
/* Set these to your desired credentials. */
const char *ssid = "Mega";
const char *password = "12345678";
ESP8266WebServer server(80);
/* Just a little test message. Go to the IP address you setup below in a web browser
connected to this access point to see it.
*/
void handleRoot() {
server.send(200, "text/html", "Hey Dirtbug");
}
void setup() {
delay(1000);
Serial.begin(57600);
Serial.println();
Serial.print("Configuring access point…");
//--------------------------------------------
IPAddress local_IP(192,168,0,20);
IPAddress gateway(192,168,0,1);
IPAddress subnet(255,255,255,0);
Serial.print("Setting soft-AP configuration … ");
Serial.println(WiFi.softAPConfig(local_IP, gateway, subnet) ? "Ready" : "Failed!");
Serial.print("Setting soft-AP … ");
Serial.println(WiFi.softAP("ESPsoftAP_01") ? "Ready" : "Failed!");
Serial.print("Soft-AP IP address = ");
Serial.println(WiFi.softAPIP());
//--------------------------------------------
/* You can remove the password parameter if you want the AP to be open. */
WiFi.softAP(ssid, password);
// IPAddress myIP = WiFi.softAPIP();
Serial.print("AP IP address: ");
//Serial.println(myIP);
server.on("/", handleRoot);
server.begin();
Serial.println("HTTP server started");
}
void loop()
{
server.handleClient();
}
This code works fine. get data in the serial monitor and displays it no issues.
I have tried to flash it with "ESP_8266_NONOS_SDK"(v2.2.1 and v3.0.4) and "ESP8266-IDF-ATV2.2.1.0" using esptools in python, or flashing programs "flash_download_tool_v3.8.8" and "nodemcu-flasher-master" I am always getting these errors or variations of. I am using the following settings as they work in the arduino code:
I have used these settings when configuring the flashing tools, and .bin addresses as shown in this table here from the manufacturer (4096 512+512 for the 32Mb flash):
But I'm still getting very similar error codes to above through serial monitor.
Ideally I want to use AT commands through the inbuilt serial between the Mega and ESP8266 to send and receive small packets of information in an SQL database.
Where can I start to try get this thing to work? Is there any Arduino sketch that will give me AT commands? Is there any particular settings I can try tweak to get the firmware to flash properly?
Thanks for your time. I really appreciate any help that can be offered!
