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ESP 01 overheating

alphaallan

Hello everyone, i am running a small project using an ESP 01, every thing has working fine when out of the nowhere the ESP started to overheat. At first i thought that i had made something wrong with the power supply and/or program (i had fried a PIC 16F877A in pass just because of a typo), but a checked every thing and i didn't mess up this time, in fact even the blink example for the ESP makes it goes really hot now.

The circuit is an remote control for two relays, managed by an ESP 01 powered by an dedicated 3V3 power supply (for the ESP only) with the GPIO0 and GPIO2 hooked to a pair of optocouplers with 130R resistors, the program uses the aREST and aREST UI API.

if anyone can tell me what maybe happen and if it can be fixed, i will be glad. 

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  • 0

    Hi Allan,

     

    Detail is needed.. high quality photos of your set-up, and ideally a circuit diagram if possible, and let people know what tools you have access to, in order to troubleshoot.

    The editor tools you need for inserting photos inline etc are described here:

    How to Ask Questions using the Create Discussion tool

  • 0 in reply to shabaz

    image

    #include <ESP8266WiFi.h>
#include <aREST.h>
#include <aREST_UI.h>

aREST_UI rest = aREST_UI();

// WiFi parameters
const char* ssid = "----";
const char* password = "-----";

#define LISTEN_PORT           80
WiFiServer server(LISTEN_PORT);

void setup(void)
{  
  // Start Serial
  Serial.begin(115200);
  
  // Create UI
  rest.title("Relay Control");
  rest.button(0);
  rest.button(2);
    
  // Give name and ID to device
  rest.set_id("1");
  rest.set_name("esp8266");
  
  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");

  // Start the server
  server.begin();
  Serial.println("Server started");
  
  // Print the IP address
  Serial.println(WiFi.localIP());
  
}

void loop() {
  
  // Handle REST calls
  WiFiClient client = server.available();
  
  if (!client) {
    return;
  }
  while(!client.available()){
    delay(1);
  }
  rest.handle(client);

}

     

    Well, here is the diagram, the source code and a few more details.

    1° Besides being crazy hot the ESP runs as it should, so the oscillator must be working properly

    2° the Flash memory seams to be fine, since it does not overheats and i still can flash programs

    3° I had swapped the ESP that i was using by another one, and every thing is working normally (just like the first one in the beginning of my tests)

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  • 0 in reply to shabaz

    image

    #include <ESP8266WiFi.h>
#include <aREST.h>
#include <aREST_UI.h>

aREST_UI rest = aREST_UI();

// WiFi parameters
const char* ssid = "----";
const char* password = "-----";

#define LISTEN_PORT           80
WiFiServer server(LISTEN_PORT);

void setup(void)
{  
  // Start Serial
  Serial.begin(115200);
  
  // Create UI
  rest.title("Relay Control");
  rest.button(0);
  rest.button(2);
    
  // Give name and ID to device
  rest.set_id("1");
  rest.set_name("esp8266");
  
  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");

  // Start the server
  server.begin();
  Serial.println("Server started");
  
  // Print the IP address
  Serial.println(WiFi.localIP());
  
}

void loop() {
  
  // Handle REST calls
  WiFiClient client = server.available();
  
  if (!client) {
    return;
  }
  while(!client.available()){
    delay(1);
  }
  rest.handle(client);

}

     

    Well, here is the diagram, the source code and a few more details.

    1° Besides being crazy hot the ESP runs as it should, so the oscillator must be working properly

    2° the Flash memory seams to be fine, since it does not overheats and i still can flash programs

    3° I had swapped the ESP that i was using by another one, and every thing is working normally (just like the first one in the beginning of my tests)

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