JavanXD · November 24, 2025 16:30 · moritzj29 · Sep 5, 2025 · sisamiwe · Sep 11, 2025
diff --git a/esphome-ledaluc2.yaml b/esphome-ledaluc2.yaml
 substitutions:
  name: esphome-ledaluc2
  friendly_name: ESPHome LEDA LUC2

 esphome:
  name: ${name}
  friendly_name: ${friendly_name}
  min_version: 2023.6.0  # Use a stable ESPHome version for compatibility
  name_add_mac_suffix: false  # Prevent adding MAC suffix to the device name
  project:
    name: esphome.web
    version: dev  # Version of the project

 esp32:
  board: esp32dev  # Specify the ESP32 development board
  framework:
    type: arduino  # Use the Arduino framework

 # Enable logging for debugging purposes
 logger:

 # Enable Home Assistant API with encryption key from secrets.yaml
 api:
  encryption:
    key: !secret api_key

 # Enable over-the-air updates for firmware
 ota:
  platform: esphome

 wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Fallback hotspot in case Wi-Fi connection fails
  ap:
    ssid: "ESPHome-LEDALUC2"
    password: !secret ap_password

 # Allow Wi-Fi provisioning via serial connection
 improv_serial:

 # Enable captive portal for Wi-Fi provisioning via the fallback hotspot
 captive_portal:

 # Import specific components from an example configuration without overwriting local settings
 dashboard_import:
  package_import_url: github://esphome/example-configs/esphome-web/esp32.yaml@main
  import_full_config: false

 # Host a simple web server (e.g., for Improv Wi-Fi)
 web_server:

 # Configure the SPI interface for the MCP2515 CAN bus module
 spi:
  clk_pin: GPIO22  # Clock pin
  miso_pin: GPIO17  # Master In Slave Out pin
  mosi_pin: GPIO21  # Master Out Slave In pin

 # Configure the CAN bus using the MCP2515 module
 canbus:
  - platform: mcp2515
    cs_pin: GPIO16
    can_id: 0x28A
    bit_rate: 125KBPS
    on_frame:
      - can_id: 0x28A
        then:
          - lambda: |-
              // Log all received CAN frames for debugging
              if (x.size() > 0 && x.size() < 8) {
                // Log the received frame data safely
                std::string frame_data;
                for (size_t i = 0; i < x.size(); i++) {
                    char byte_str[5];
                    snprintf(byte_str, sizeof(byte_str), "0x%02X ", x[i]);
                    frame_data += byte_str;
                }

                // Log the frame data in a single line
                ESP_LOGD("CAN", "Received CAN Frame (Size: %d bytes): %s", x.size(), frame_data.c_str());
                
                // Check for specific sizes and log states
                if (x.size() == 2) {
                    ESP_LOGI("CAN", "Interpreted State: Ventilation turned OFF via Display");
                } else if (x.size() == 1) {
                    ESP_LOGI("CAN", "Interpreted State: Ventilation turned ON via Display");
                } else {
                    ESP_LOGW("CAN", "Interpreted State: Unknown or Additional Data");
                }
              } 
              else if (x.size() == 8) {
                uint8_t frame_type = x[0];  // First byte determines the frame type

                // Frame type 0x00: Pressure difference and exhaust temperature
                if (frame_type == 0x00) {
                  // Extract pressure difference from Byte 2
                  float pressure_difference = x[1] * 0.1f;  // Convert to Pascals

                  // Check for adjustment flag in Byte 3
                  if (x[2] == 0x81) {
                    const float PRESSURE_ADJUSTMENT_VALUE = 25.5f;
                    pressure_difference += PRESSURE_ADJUSTMENT_VALUE;
                    ESP_LOGI("CAN", "Adjustment Applied: +%.1f Pa", PRESSURE_ADJUSTMENT_VALUE);
                  }

                  // Extract exhaust temperature from Byte 4
                  uint16_t raw_temp = x[3] | (x[4] << 8);  // Little Endian
                  float exhaust_temperature = static_cast<float>(raw_temp);  // °C
                  
                  // Log decoded values
                  ESP_LOGI("CAN", "Pressure: %.1f Pa, Temperature: %.1f °C", pressure_difference, exhaust_temperature);

                  // Publish to sensors
                  id(pressure_difference_sensor).publish_state(pressure_difference);
                  id(exhaust_temperature_sensor).publish_state(exhaust_temperature);
                }
                // Frame type 0x01: Ventilation status
                else if (frame_type == 0x01) {
                  // Extract ventilation status from Byte 6
                  bool ventilation_active = (x[5] == 0x01);

                  // Log ventilation status
                  ESP_LOGI("CAN", "Ventilation Active: %s", ventilation_active ? "Yes" : "No");
                  ESP_LOGD("CAN", "Ventilation Bytes: Data=%02X %02X %02X %02X %02X %02X %02X %02X",
                          x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);

                  // Publish to binary sensor
                  id(ventilation_status_sensor).publish_state(ventilation_active);
                }
                // Frame type 0x09: Heartbeat signal
                else if (frame_type == 0x09) {
                  // Log loop and counter for reference
                  ESP_LOGD("CAN", "Heartbeat (0x09): Loop=%02X, Counter=%02X", x[2], x[1]);
                }
                // Frame type 0x55: Heartbeat signal
                else if (frame_type == 0x55) {
                  // Log loop and counter for reference
                  ESP_LOGD("CAN", "Heartbeat (0x55): Loop=%02X, Counter=%02X", x[2], x[1]);
                }
                else if (frame_type == 0x80) {
                  ESP_LOGW("CAN", "Error Frame (0x80): Data=%02X %02X %02X %02X %02X %02X %02X %02X",
                          x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);
                }
                else if (frame_type == 0x81) {
                  ESP_LOGW("CAN", "Error Frame (0x81): Data=%02X %02X %02X %02X %02X %02X %02X %02X",
                          x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);
                }
                // Handle unknown frame types
                else {
                  ESP_LOGW("CAN", "Unknown Frame Type. Data=%02X %02X %02X %02X %02X %02X %02X %02X",
                           x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);
                }
              } else {
                ESP_LOGW("CAN", "Unexpected frame size: %d bytes", x.size());
              }

 # Define template sensors to hold the values published from the CAN bus data
 sensor:
  - platform: template
    name: "Pressure Difference"
    id: pressure_difference_sensor
    unit_of_measurement: "Pa"
    accuracy_decimals: 1
    device_class: pressure  # Device class for pressure sensors
    icon: "mdi:air-filter"  # Optional custom icon for visual clarity
    filters:
      - throttle_average: 3s
   
  - platform: template
    name: "Exhaust Temperature"
    id: exhaust_temperature_sensor
    unit_of_measurement: "°C"
    accuracy_decimals: 1
    device_class: temperature  # Device class for temperature sensors
    icon: "mdi:thermometer"
    filters:
      - throttle_average: 3s
          

 binary_sensor:
  - platform: template
    name: "Ventilation Status"
    id: ventilation_status_sensor
    device_class: running  # Device class for indicating system activity
    icon: "mdi:fan"  # Optional custom icon for ventilation
	substitutions:
	name: esphome-ledaluc2
	friendly_name: ESPHome LEDA LUC2

	esphome:
	name: ${name}
	friendly_name: ${friendly_name}
	min_version: 2023.6.0 # Use a stable ESPHome version for compatibility
	name_add_mac_suffix: false # Prevent adding MAC suffix to the device name
	project:
	name: esphome.web
	version: dev # Version of the project

	esp32:
	board: esp32dev # Specify the ESP32 development board
	framework:
	type: arduino # Use the Arduino framework

	# Enable logging for debugging purposes
	logger:

	# Enable Home Assistant API with encryption key from secrets.yaml
	api:
	encryption:
	key: !secret api_key

	# Enable over-the-air updates for firmware
	ota:
	platform: esphome

	wifi:
	ssid: !secret wifi_ssid
	password: !secret wifi_password

	# Fallback hotspot in case Wi-Fi connection fails
	ap:
	ssid: "ESPHome-LEDALUC2"
	password: !secret ap_password

	# Allow Wi-Fi provisioning via serial connection
	improv_serial:

	# Enable captive portal for Wi-Fi provisioning via the fallback hotspot
	captive_portal:

	# Import specific components from an example configuration without overwriting local settings
	dashboard_import:
	package_import_url: github://esphome/example-configs/esphome-web/esp32.yaml@main
	import_full_config: false

	# Host a simple web server (e.g., for Improv Wi-Fi)
	web_server:

	# Configure the SPI interface for the MCP2515 CAN bus module
	spi:
	clk_pin: GPIO22 # Clock pin
	miso_pin: GPIO17 # Master In Slave Out pin
	mosi_pin: GPIO21 # Master Out Slave In pin

	# Configure the CAN bus using the MCP2515 module
	canbus:
	- platform: mcp2515
	cs_pin: GPIO16
	can_id: 0x28A
	bit_rate: 125KBPS
	on_frame:
	- can_id: 0x28A
	then:
	- lambda: \|-
	// Log all received CAN frames for debugging
	if (x.size() > 0 && x.size() < 8) {
	// Log the received frame data safely
	std::string frame_data;
	for (size_t i = 0; i < x.size(); i++) {
	char byte_str[5];
	snprintf(byte_str, sizeof(byte_str), "0x%02X ", x[i]);
	frame_data += byte_str;
	}

	// Log the frame data in a single line
	ESP_LOGD("CAN", "Received CAN Frame (Size: %d bytes): %s", x.size(), frame_data.c_str());

	// Check for specific sizes and log states
	if (x.size() == 2) {
	ESP_LOGI("CAN", "Interpreted State: Ventilation turned OFF via Display");
	} else if (x.size() == 1) {
	ESP_LOGI("CAN", "Interpreted State: Ventilation turned ON via Display");
	} else {
	ESP_LOGW("CAN", "Interpreted State: Unknown or Additional Data");
	}
	}
	else if (x.size() == 8) {
	uint8_t frame_type = x[0]; // First byte determines the frame type

	// Frame type 0x00: Pressure difference and exhaust temperature
	if (frame_type == 0x00) {
	// Extract pressure difference from Byte 2
	float pressure_difference = x[1] * 0.1f; // Convert to Pascals

	// Check for adjustment flag in Byte 3
	if (x[2] == 0x81) {
	const float PRESSURE_ADJUSTMENT_VALUE = 25.5f;
	pressure_difference += PRESSURE_ADJUSTMENT_VALUE;
	ESP_LOGI("CAN", "Adjustment Applied: +%.1f Pa", PRESSURE_ADJUSTMENT_VALUE);
	}

	// Extract exhaust temperature from Byte 4
	uint16_t raw_temp = x[3] \| (x[4] << 8); // Little Endian
	float exhaust_temperature = static_cast<float>(raw_temp); // °C

	// Log decoded values
	ESP_LOGI("CAN", "Pressure: %.1f Pa, Temperature: %.1f °C", pressure_difference, exhaust_temperature);

	// Publish to sensors
	id(pressure_difference_sensor).publish_state(pressure_difference);
	id(exhaust_temperature_sensor).publish_state(exhaust_temperature);
	}
	// Frame type 0x01: Ventilation status
	else if (frame_type == 0x01) {
	// Extract ventilation status from Byte 6
	bool ventilation_active = (x[5] == 0x01);

	// Log ventilation status
	ESP_LOGI("CAN", "Ventilation Active: %s", ventilation_active ? "Yes" : "No");
	ESP_LOGD("CAN", "Ventilation Bytes: Data=%02X %02X %02X %02X %02X %02X %02X %02X",
	x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);

	// Publish to binary sensor
	id(ventilation_status_sensor).publish_state(ventilation_active);
	}
	// Frame type 0x09: Heartbeat signal
	else if (frame_type == 0x09) {
	// Log loop and counter for reference
	ESP_LOGD("CAN", "Heartbeat (0x09): Loop=%02X, Counter=%02X", x[2], x[1]);
	}
	// Frame type 0x55: Heartbeat signal
	else if (frame_type == 0x55) {
	// Log loop and counter for reference
	ESP_LOGD("CAN", "Heartbeat (0x55): Loop=%02X, Counter=%02X", x[2], x[1]);
	}
	else if (frame_type == 0x80) {
	ESP_LOGW("CAN", "Error Frame (0x80): Data=%02X %02X %02X %02X %02X %02X %02X %02X",
	x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);
	}
	else if (frame_type == 0x81) {
	ESP_LOGW("CAN", "Error Frame (0x81): Data=%02X %02X %02X %02X %02X %02X %02X %02X",
	x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);
	}
	// Handle unknown frame types
	else {
	ESP_LOGW("CAN", "Unknown Frame Type. Data=%02X %02X %02X %02X %02X %02X %02X %02X",
	x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]);
	}
	} else {
	ESP_LOGW("CAN", "Unexpected frame size: %d bytes", x.size());
	}

	# Define template sensors to hold the values published from the CAN bus data
	sensor:
	- platform: template
	name: "Pressure Difference"
	id: pressure_difference_sensor
	unit_of_measurement: "Pa"
	accuracy_decimals: 1
	device_class: pressure # Device class for pressure sensors
	icon: "mdi:air-filter" # Optional custom icon for visual clarity
	filters:
	- throttle_average: 3s

	- platform: template
	name: "Exhaust Temperature"
	id: exhaust_temperature_sensor
	unit_of_measurement: "°C"
	accuracy_decimals: 1
	device_class: temperature # Device class for temperature sensors
	icon: "mdi:thermometer"
	filters:
	- throttle_average: 3s


	binary_sensor:
	- platform: template
	name: "Ventilation Status"
	id: ventilation_status_sensor
	device_class: running # Device class for indicating system activity
	icon: "mdi:fan" # Optional custom icon for ventilation
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