NodeMCU Issues

Projects General Guidance
1

Hi Again,

I have been trying to get my NodeMCU to connect to my modem using the WIfI HTTPSREQUESTAxTLS script that comes as an example with the esp8266 library however every time I try uploading the code to the Node it just gives this off.

ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 1392, room 16 
tail 0
chksum 0xd0
csum 0xd0
v3d128e5c
~ld

connecting to VM082331-2G

 ets Jan  8 2013,rst cause:4, boot mode:(3,6)

wdt reset
load 0x4010f000, len 1392, room 16 
tail 0
chksum 0xd0
csum 0xd0
v3d128e5c
~ld

I have the correct details for my modem however it doesn't even go through to "connecting to Wifi"

This is what the code looks like.

#define USING_AXTLS
#include <ESP8266WiFi.h>

// force use of AxTLS (BearSSL is now default)
#include <WiFiClientSecureAxTLS.h>
using namespace axTLS;

#ifndef STASSID
#define STASSID "********"
#define STAPSK  "********"
#endif

const char* ssid = STASSID;
const char* password = STAPSK;

const char* host = "api.github.com";
const int httpsPort = 443;

// Use web browser to view and copy
// SHA1 fingerprint of the certificate
const char* fingerprint = "5F F1 60 31 09 04 3E F2 90 D2 B0 8A 50 38 04 E8 37 9F BC 76";

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.print("connecting to ");
  Serial.println(ssid);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  // Use WiFiClientSecure class to create TLS connection
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored  "-Wdeprecated-declarations"
  WiFiClientSecure client;
#pragma GCC diagnostic pop
  Serial.print("connecting to ");
  Serial.println(host);
  if (!client.connect(host, httpsPort)) {
    Serial.println("connection failed");
    return;
  }

  if (client.verify(fingerprint, host)) {
    Serial.println("certificate matches");
  } else {
    Serial.println("certificate doesn't match");
  }

  String url = "/repos/esp8266/Arduino/commits/master/status";
  Serial.print("requesting URL: ");
  Serial.println(url);

  client.print(String("GET ") + url + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" +
               "User-Agent: BuildFailureDetectorESP8266\r\n" +
               "Connection: close\r\n\r\n");

  Serial.println("request sent");
  while (client.connected()) {
    String line = client.readStringUntil('\n');
    if (line == "\r") {
      Serial.println("headers received");
      break;
    }
  }
  String line = client.readStringUntil('\n');
  if (line.startsWith("{\"state\":\"success\"")) {
    Serial.println("esp8266/Arduino CI successfull!");
  } else {
    Serial.println("esp8266/Arduino CI has failed");
  }
  Serial.println("reply was:");
  Serial.println("==========");
  Serial.println(line);
  Serial.println("==========");
  Serial.println("closing connection");
}

void loop() {
}

Does anyone know how I can test this or try debug it?
I have had a look online as well however barely anyone talks about how to just connect to the Wifi, and when they do they never cover it so that is why I have used an example to try it.

I have tried serveral of these however they either do not begin the connection or never connect.

Thanks for having a look,
Ben

2

Are you getting any output on Serial Monitor?

3

Nothing suspicious in the code - the error (wdt reset) suggests there's some code blocking the background processes from running for too long, but I don't see any of that in your code.

The output you post suggests it at least reaches the line Serial.println(ssid);, the lines after that look perfectly normal to me, the standard way of connecting to a network. The WiFi.mode(WIFI_STA); is redundant as that's the default mode (station only).

Maybe you can find some suggestions in this ESP8266 starter's guide.