DevHeads IoT Integration Server•5mo ago

Resolving Intermittent Failures in ESP32-Based IoT Project with MQTT and I2C Sensors

Hey guys i am experiencing intermittent failures in my ESP32-based IoT project, which collects light sensor data from an ESP01 via MQTT. Despite implementing robust error handling and verifying I2C connections, I'm encountering: - Sporadic disconnections from the MQTT broker, resulting in missed sensor readings - Inconsistent timing in sensor data transmission, causing data gaps Error messages: - MQTT connection timeout: Timed out waiting for incoming data - I2C write error: SDA line stuck low Code snippet:

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  // Read sensor data
  int sensorValue = readSensorData();
  // Publish to MQTT topic
  client.publish("esp01/light", String(sensorValue).c_str());
  delay(1000); // 1-second interval
}

void reconnect() {
  while (!client.connected()) {
    if (client.connect("ESP32Client")) {
      client.subscribe("esp01/light");
    } else {
      delay(5000);
    }
  }
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  // Read sensor data
  int sensorValue = readSensorData();
  // Publish to MQTT topic
  client.publish("esp01/light", String(sensorValue).c_str());
  delay(1000); // 1-second interval
}

void reconnect() {
  while (!client.connected()) {
    if (client.connect("ESP32Client")) {
      client.subscribe("esp01/light");
    } else {
      delay(5000);
    }
  }
}

After reviewing task priorities, stack sizes, and mutexes, I suspect a subtle issue related to context switching between tasks or timing-sensitive operations. What advanced debugging techniques or optimization strategies can I employ to identify and resolve the root cause of these intermittent failures?

Solution:

check this out https://www.electronicwings.com/esp32/reconnect-esp32-to-wi-fi-network-after-lost-connection

Reconnect ESP32 to Wi-Fi Network After Lost Connection | ESP32

In this guide, we will see how to reconnect to the wifi network after being lost on ESP32 Board.

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3 Replies

Marvee Amasi•5mo ago

Funny enough excessive power consumption can lead to this instability @Daniel kalu , make your power usage optimal. Even high temperatures can affect component performance. Work on cooling. electromagnetic interference could disrupt the communication. And you should verify compatibility between ESP32, ESP01, and other components

te0•5mo ago

I would recommend you to use the ESP-AWS-IOT framework, its more powerful

Solution

Joseph Ogbonna•5mo ago

check this out https://www.electronicwings.com/esp32/reconnect-esp32-to-wi-fi-network-after-lost-connection

Reconnect ESP32 to Wi-Fi Network After Lost Connection | ESP32

In this guide, we will see how to reconnect to the wifi network after being lost on ESP32 Board.

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Resolving Intermittent Failures in ESP32-Based IoT Project with MQTT and I2C Sensors