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d1sc0

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

ive disabled all firewall , and added an inbound rule in windows defender firewall with advanced security to allow only specific remote ports and entered the ports i tried like 1883, 8883, 8884, 8091 etc (i tried using all these ports with/without encryption and with/without websockets)

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

i tried websockeets on a different ports - 8091 and 888

protocol websockets

protocol websockets

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

ive changed mosquitto.conf like this

listener 8884
allow_anonymous true
max_connections -1
certfile C:\Users\91903\Desktop\encryption\ca-cert.pem
keyfile C:\Users\91903\Desktop\encryption\encryption2\ca-key.pem

listener 8884
allow_anonymous true
max_connections -1
certfile C:\Users\91903\Desktop\encryption\ca-cert.pem
keyfile C:\Users\91903\Desktop\encryption\encryption2\ca-key.pem

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

server is a broker service called mosquitto running on my localhost ... so its my localhost ipv4 address

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

also i used wificlientsecure to use tls with mqtt , not https

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

I didnt quite get what you meant isnt this how we can publish?

client.publish("myTopic", msg);

client.publish("myTopic", msg);

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

https://www.ibm.com/docs/en/runbook-automation?topic=certificate-generate-root-ca-key

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

i generated certificates referring this

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

(generated the certificates using openssl)

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

Ive configured my mosquitto config file also , adding the required listeners and path to certificates

29 replies

DIIDevHeads IoT Integration Server

•Created by d1sc0 on 2/16/2024 in #firmware-and-baremetal

Receiving "rc= -2" error with ESP32 MQTT TLS certificates

c++
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <PubSubClient.h>

const char* ssid = "my ssid";
const char* password = "redacted";
const char* mqtt_server = "mylocalhost";

const char* rootca = \
  "-----BEGIN CERTIFICATE-----\n"
  "-----END CERTIFICATE-----\n";

unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];
int countValue = 0;

WiFiClientSecure espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  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());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);

    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  espClient.setCACert(rootca);
  client.setServer(mqtt_server, 8883);  
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  unsigned long now = millis();
  if (now - lastMsg > 5000) {
    lastMsg = now;
    ++countValue;
    snprintf(msg, MSG_BUFFER_SIZE, "Count: %d", countValue);
    Serial.print("Publish message: ");
    Serial.println(msg);  
    client.publish("myTopic", msg); 
  }
}

c++
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <PubSubClient.h>

const char* ssid = "my ssid";
const char* password = "redacted";
const char* mqtt_server = "mylocalhost";

const char* rootca = \
  "-----BEGIN CERTIFICATE-----\n"
  "-----END CERTIFICATE-----\n";

unsigned long lastMsg = 0;
#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];
int countValue = 0;

WiFiClientSecure espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  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());
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    String clientId = "ESP32Client-";
    clientId += String(random(0xffff), HEX);

    if (client.connect(clientId.c_str())) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  espClient.setCACert(rootca);
  client.setServer(mqtt_server, 8883);  
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  unsigned long now = millis();
  if (now - lastMsg > 5000) {
    lastMsg = now;
    ++countValue;
    snprintf(msg, MSG_BUFFER_SIZE, "Count: %d", countValue);
    Serial.print("Publish message: ");
    Serial.println(msg);  
    client.publish("myTopic", msg); 
  }
}

29 replies

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