########################################################################################## ########################################################################################## # Nissan Leaf 12V Battery Monitor # Monitoring the status of a vehicle 12V battery with # an esp8266 (D1 Mini). It will obviously only # transmit when the vehicle is within wifi range. # Voltage is measured with a resistor voltage divider # into the analogue GPIO on the esp8266. # https://zorruno.com/2022/vehicle-12v-battery-monitoring/ ########################################################################################## ########################################################################################## ########################################################################################## # SPECIFIC DEVICE VARIABLE SUBSTITUTIONS # If NOT using a secrets file, just replace these with the passwords etc (in quotes) ########################################################################################## substitutions: # Device Naming device_name: "esp-leafbattery" friendly_name: "Nissan Leaf 12V Battery Monitor" description_comment: "Nissan Leaf 12V Battery Monitor (when home)" device_area: "Garage" # Allows ESP device to be automatically linked to an 'Area' in Home Assistant. # Project Naming project_name: "Generic ESP8266.D1 Mini" # Project Details project_version: "v1.0" # Project V denotes release of yaml file, allowing checking of deployed vs latest version # Passwords & Secrets api_key: !secret esp-api_key # unfortunately you can't use substitutions inside secrets names ota_pass: !secret esp-ota_pass # unfortunately you can't use substitutions inside secrets names static_ip_address: !secret esp-leafbattery_ip mqtt_command_main_topic: !secret mqtt_command_main_topic mqtt_status_main_topic: !secret mqtt_status_main_topic # MQTT LOCAL Controls mqtt_device_name: "leaf-battery" mqtt_command_topic: "${mqtt_command_main_topic}/${mqtt_device_name}" # Topic we will use to command this locally without HA mqtt_status_topic: "${mqtt_status_main_topic}/${mqtt_device_name}" # Topic we will use to view status locally without HA # Device Settings #relay_icon: "mdi:lightbulb-group" log_level: "INFO" # Define logging level: NONE, ERROR, WARN, INFO, DEBUG (Default), VERBOSE, VERY_VERBOSE update_interval: "60s" # update time for for general sensors etc wake_interval: "20s" sleep_interval: "300s" mqtt_fail_sleep: "1h" # If MQTT is unavailable after boot wait, sleep this long ########################################################################################## # PACKAGES: Included Common Packages # https://esphome.io/components/packages.html ########################################################################################## # Comment some of these out where not needed, eg MQTT, Web portal, SNTP, General Sensors ########################################################################################## packages: #### WIFI, Network (Static/DHCP/IPV6 etc), Fallback AP, Safemode #### common_wifi: !include file: common/network_common.yaml vars: local_device_name: "${device_name}" local_static_ip_address: "${static_ip_address}" local_ota_pass: "${ota_pass}" #### HOME ASSISTANT API (choose encryption or no encryption options) #### common_api: !include file: common/api_common.yaml #file: common/api_common_noencryption.yaml vars: local_api_key: "${api_key}" #### MQTT #### common_mqtt: !include file: common/mqtt_common.yaml vars: local_device_name: "${device_name}" #### WEB PORTAL #### common_webportal: !include common/webportal_common.yaml #### SNTP (Only use if you want/need accurate timeclocks) #### #common_sntp: !include common/sntp_common.yaml #### DIAGNOSTICS Sensors #### diag_basic: !include common/include_basic_diag_sensors.yaml diag_more: !include common/include_more_diag_sensors.yaml #diag_debug: !include common/include_debug_diag_sensors.yaml #diag_resetcount: !include common/include_resetcount_diag_sensors.yaml ########################################################################################## # ESPHome # https://esphome.io/components/esphome.html ########################################################################################## esphome: name: ${device_name} friendly_name: ${friendly_name} comment: ${description_comment} #appears on the esphome page in HA min_version: 2024.6.0 on_boot: priority: 600 then: # Default: do NOT deep sleep until explicitly enabled via MQTT - deep_sleep.prevent: deep_sleep_1 - logger.log: "Deep sleep prevented by default on boot." # Fail-safe: wait up to 30s for MQTT; if not connected, sleep longer (backoff) - wait_until: condition: mqtt.connected: timeout: 30s - if: condition: not: mqtt.connected: then: - logger.log: "MQTT unreachable after 30s -> entering FALLBACK sleep for ${mqtt_fail_sleep}." - deep_sleep.enter: id: deep_sleep_1 sleep_duration: ${mqtt_fail_sleep} # override only this cycle else: - logger.log: "MQTT connected; awaiting '${mqtt_command_topic}/deepsleep' command." ########################################################################################## # ESP Platform and Framework # https://esphome.io/components/esp8266.html # https://esphome.io/components/esp32.html ########################################################################################## esp8266: board: d1_mini framework: version: latest #recommended, latest or dev ########################################################################################## # ESPHome Logging Enable # https://esphome.io/components/logger.html ########################################################################################## logger: level: "${log_level}" #INFO Level suggested, or DEBUG for testing #baud_rate: 0 #set to 0 for no logging via UART, needed if you are using it for other serial things (eg PZEM) #esp8266_store_log_strings_in_flash: false #tx_buffer_size: 64 ############################################# # Enable Over the Air Update Capability # https://esphome.io/components/ota.html?highlight=ota ############################################# ota: - platform: web_server # Uncomment if you want to be able to do OTA with the web interface ########################################################################################## # MQTT COMMANDS # This adds device-specific MQTT command triggers to the common MQTT configuration. ########################################################################################## mqtt: # Availability Topic birth_message: topic: ${mqtt_status_topic}/availability payload: online will_message: topic: ${mqtt_status_topic}/availability payload: offline # Control deep sleep over MQTT on_message: - topic: ${mqtt_command_topic}/deepsleep payload: "ON" then: - deep_sleep.allow: deep_sleep_1 - logger.log: "Deep sleep ALLOWED via MQTT. Device will sleep when run_duration elapses." - topic: ${mqtt_command_topic}/deepsleep payload: "OFF" then: - deep_sleep.prevent: deep_sleep_1 - logger.log: "Deep sleep PREVENTED via MQTT." ########################################################################################## # Deep Sleep # https://esphome.io/components/deep_sleep.html ########################################################################################## deep_sleep: id: deep_sleep_1 run_duration: ${wake_interval} sleep_duration: ${sleep_interval} ########################################################################################## # SENSOR COMPONENT # https://esphome.io/components/sensor/ ########################################################################################## sensor: - platform: adc pin: A0 name: "Battery Voltage" id: battery_voltage update_interval: 4s retain: true filters: - multiply: 3.3 - calibrate_linear: - 0.72 -> 16.00 - 0.68 -> 15.00 - 0.63 -> 14.00 - 0.59 -> 13.00 - 0.55 -> 12.00 - 0.51 -> 11.00 - 0.45 -> 10.00 - 0.40 -> 09.00 - 0.36 -> 08.00 - 0.32 -> 07.00 - 0.28 -> 06.00 - 0.23 -> 05.00 - delta: 0.05 # publish immediately if change >= 0.05 V - throttle: 2s # avoid bursts if noisy on_value: then: - mqtt.publish: topic: "${mqtt_status_topic}/batteryvoltage" qos: 1 retain: true payload: !lambda |- char buf[10]; snprintf(buf, sizeof(buf), "%.2f", x); return std::string(buf); ########################################################################################## # INTERVAL COMPONENT ########################################################################################## interval: - interval: 60s then: - mqtt.publish: topic: "${mqtt_status_topic}/batteryvoltage" qos: 1 retain: true payload: !lambda |- const float v = id(battery_voltage).state; // current filtered state char buf[10]; snprintf(buf, sizeof(buf), "%.2f", v); return std::string(buf);