Well, this is already a long story even before I start it!
I'll try to summarise my struggle to keep this short and clean.
First things first:
The board I bought is this one:
https://www.indiegogo.com/projects/chea ... ore-gpio#/This looks like the site of the build of this PCB but looks like there is very little documentation about this board.
Just a side note:
I'll call "board" when I want to refer to the PCB and the ESP8266 module and I'll call "module" to the ESP8266 module itslef!
I wanted to test the serial connection of this board/module by sending commands such as AT, etc to check the reply but I still couldn't do it. The struggle is that I have already tried about everything and as I'm not that experienced with this ESP8266 module I'm afraid I might have damaged it but I'm not sure!
I have already flashed this 3 firmwares for testing purposes, using esptool.py:
ai-thinker-0.9.5.2-9600.bin
ai-thinker-0.9.5.2-115200.bin
nodemcu_float_0.9.6-dev_20150704.bin
I have tried putty, Arduino Serial monitor and also ESPlorer to try to send the serial commands and I can't get an answer.
I already tried a direct connection with an UART-to-Serial converter and I also tried to communicate with it using an Arduino Uno R3 but still can't send any serial commands and get an answer.
When I press the Reset button on this board, I only get weird chars but not even changing baud rate fixes it! Not in putty, ESPlorer or Arduino Serial Monitor.
In ESPlorer I get a message saying "Port Open" and "Communicating with device OK" but then it should auto-detect the firmware but it only says it can't detect the firmware. Then it says to reset device or to continue! But I can't get any answer after trying to send a serial command such as AT.
I'm going to take some screens and I'll post them here later.
The help I need is to check some signals in the module. If someone tells me "ahh that one sounds wrong" then probably I can say it is damaged, however I can upload regular code to it using Arduino IDE and the module connects to my home wireless network!
ESPlorer shows me this:
The code I'm uploading using Arduino IDE is this:
Code: Select all#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
const char* ssid = "XXXxxxXXX";
const char* password = "yyyYYYyyy";
ESP8266WebServer server(80); // HTTP server on port 80
void setup() {
Serial.begin(115200);
WiFi.disconnect(); // Disconnect AP
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password); // Connect to WIFI network
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.println(".");
}
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
server.on("/", [](){
server.send(200, "text/plain", "Hello World");
}
);
server.begin(); // Start HTTP server
Serial.println("HTTP server started.");
}
void loop() {
server.handleClient();
} I can see the module connected to my wireless network.
I have tried so many configuration combinations in ESPlorer and in putty and also in Arduino Serial Monitor that I can't remember of anything else! Of course, my knowledge is also limited!
So, if anyone knows of anything else I can do, please let me know! Otherwise I'll ask help to check signals on all ESP8266 module to check if there is the change of a damaged module!
Posted: Mon Sep 11, 2017 12:34 pm