BSSL:Couldn't connect. Error = 'Unknown error code. when using different router

[rafaelcbarbosa]

I am having a weird problem: everything works fine when my eps8266ex (esp-01s) is connected to my ASUS Router that connects to my modem. However, when I try to connect to an old Access Point, the bot connection stops working and apparently it jam's the entire connection to that Access Point. This access point is connected to the Asus Router.

The Router seems to be working fine with my laptop, I use it daily and the performance is OK. I have tried many different versions of the esp8266 core (from 2.4.2 onwards) with no success.

The error I am getting is this:

20:30:59.796 -> connected with Coxinha-Sala, channel 3 
20:30:59.796 -> dhcp client start... 
20:30:59.831 -> ip:192.168.20.28,mask:255.255.255.0,gw:192.168.20.1 
20:31:00.043 -> BSSL:_connectSSL: start connection 
20:31:00.315 -> BSSL:_wait_for_handshake: failed 
20:31:00.315 -> BSSL:Couldn't connect. Error = 'Unknown error code.' 
20:31:00.315 -> numNewMessages: 0 
20:31:01.539 -> BSSL:_connectSSL: start connection 
20:31:01.810 -> BSSL:_wait_for_handshake: failed 
20:31:01.810 -> BSSL:Couldn't connect. Error = 'Unknown error code.' 
20:31:01.810 -> numNewMessages: 0 
20:31:03.039 -> BSSL:_connectSSL: start connection 
20:31:03.313 -> BSSL:_wait_for_handshake: failed 
20:31:03.313 -> BSSL:Couldn't connect. Error = 'Unknown error code.' 
20:31:03.313 -> numNewMessages: 0 
20:31:04.546 -> BSSL:_connectSSL: start connection 
20:31:04.784 -> BSSL:_wait_for_handshake: failed 
20:31:04.784 -> BSSL:Couldn't connect. Error = 'Unknown error code.' 
20:31:04.784 -> numNewMessages: 0 
20:31:05.783 -> state: 5 -> 2 (3c0) 
20:31:05.783 -> rm 0 
20:31:05.783 -> BSSL:connect: Unable to connect TCP socket 
20:31:05.783 -> numNewMessages: 0 
20:31:06.793 -> reconnect 
20:31:06.793 -> state: 2 -> 0 (0) 
20:31:06.793 -> BSSL:connect: Unable to connect TCP socket 
20:31:06.793 -> numNewMessages: 0 
20:31:06.929 -> scandone 
20:31:06.929 -> state: 0 -> 2 (b0) 20:31:06.929 -> state: 2 -> 3 (0) 
20:31:06.929 -> state: 3 -> 5 (10) 20:31:06.929 -> add 0 
20:31:06.929 -> aid 2 20:31:06.929 -> cnt 
20:31:07.794 -> BSSL:connect: Unable to connect TCP socket 
20:31:07.794 -> numNewMessages: 0 
20:31:07.827 ->

and my source code (very simple):

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>

#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <UniversalTelegramBot.h>

#ifndef STASSID
#define STASSID "Coxinha-Sala"
#define STAPSK "mercadolivrez"
#define BOTTOKEN "1041453184:AAH4WVWmWLyQ62btyxV5-gWqetUZB_306GY"
#endif

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

ESP8266WebServer server(80);

const int ledPin = 2;
WiFiClientSecure client;
UniversalTelegramBot *bot;
const int Bot_mtbs = 1000; //mean time between scan messages
long Bot_lasttime; //last time messages' scan has been done

void handleRoot() {
digitalWrite(ledPin, LOW);
server.send(200, "text/plain", "hello from esp8266!");
delay(300);
digitalWrite(ledPin, HIGH);
}

void setup(void) {
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, 0);
Serial.begin(115200);

startLedSequence();

WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.println("");

// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());

if (MDNS.begin("esp8266")) {
Serial.println("MDNS responder started");
}

server.on("/", handleRoot);

server.on("/inline", {
server.send(200, "text/plain", "this works as well");
});

server.onNotFound(handleNotFound);

server.begin();
Serial.println("HTTP server started");

client.setInsecure();

bot = new UniversalTelegramBot(bot_token, client);

Serial.println(ESP.getFullVersion());
}

void loop(void) {
server.handleClient();
MDNS.update();

if (millis() > Bot_lasttime + Bot_mtbs) {
int numNewMessages = bot->getUpdates(bot->last_message_received + 1) + 0;
Serial.println("numNewMessages: " + (String)numNewMessages);
while (numNewMessages) {
Serial.println("Message received from: " + bot->messages[0].from_id);
// handleNewMessages(numNewMessages);
numNewMessages = bot->getUpdates(bot->last_message_received + 1);
}
Bot_lasttime = millis();
}
}

void startLedSequence() {
Serial.println("Starting...");

digitalWrite(ledPin, HIGH); // Turn the LED off by making the voltage HIGH
Serial.println("ledPin off");

Serial.println("Starting led sequence completed.");

}

void handleNewMessages(int numNewMessages) {

Serial.println("Received " + String(numNewMessages) + " new request(s)...");

}

[rafaelcbarbosa]

UPDATE

Somehow simply setting up as 160mhz did not work.

However, I tried to force the ESP-01s into I forced it to connect using 802.11B (vs N) and it started working. I tried 802.11G and ended up with the same problem...

In summary, I solved it by force the setup to 802.11B, since I don't need bandwidth, just need stable connection. The performance was not impacted for this case.

The command I used was:

WiFi.setPhyMode(WIFI_PHY_MODE_11B);

Any idea why?

[aentinger]

Hi :wave: I for one have no idea on your particular problem but I'd like to point out that ESP8266 core rolls it's own port of BearSSL so your issue definitely is not linked up with this library.