Home-Assistant/esphome/home-energy-monitor.yaml

substitutions:
  friendly_name: "Home Energy Monitor"
  device_name: home-energy-monitor
  update_time: 59s
# SCT-013-000 (100A/50mA) calibration value
  current_cal: '27518'
# Jameco 9VAC Transformer (board v1.3+)
  voltage_cal: '7305'

esphome:
  name: ${device_name}
  friendly_name: ${friendly_name}

esp32:
  board: nodemcu-32s
  framework:
    type: esp-idf

# Enable logging
logger:
  level: INFO

# Enable Home Assistant API
api:
  encryption:
    key: !secret api_encryption_key

# Enable OTA updates
ota:
  - platform: esphome

wifi:
  ssid: !secret wifi_iot_ssid
  password: !secret wifi_password

  # Fallback hotspot if Wi-Fi fails
  ap:
    ssid: ${device_name}
    password: !secret wifi_password
  
  # Prevents aggressive reconnection attempts
  power_save_mode: none  # Use 'light' for battery devices
  
  # Slower but more reliable connection
  fast_connect: true
  
  # Handle connection failures gracefully
  on_connect:
    - logger.log: "Wi-Fi connected!"
  on_disconnect:
    - logger.log: "Wi-Fi disconnected!"

# Reduce mDNS traffic
mdns:
  disabled: true  # Set to true if using static IPs and don't need discovery

#captive_portal:

web_server:
  port: 80
# SPI bus configuration
spi:
  clk_pin: 18
  miso_pin: 19
  mosi_pin: 23

sensor:
  # ──────────────────────────────────
  # IC1: Channels 1-3 (CS pin 5)
  # ──────────────────────────────────
  - platform: atm90e32
    cs_pin: 5
    phase_a:
      voltage:
        name: ${device_name} Volts
        id: ic1Volts
        accuracy_decimals: 1
      current:
        name: ${device_name} CT1 Amps
        id: ct1Amps
      power:
        name: ${device_name} CT1 Watts
        id: ct1Watts
      gain_voltage: ${voltage_cal}
      gain_ct: ${current_cal}
    phase_b:
      current:
        name: ${device_name} CT2 Amps
        id: ct2Amps
      power:
        name: ${device_name} CT2 Watts
        id: ct2Watts
      gain_voltage: ${voltage_cal}
      gain_ct: ${current_cal}
    phase_c:
      current:
        name: ${device_name} CT3 Amps
        id: ct3Amps
      power:
        name: ${device_name} CT3 Watts
        id: ct3Watts
      gain_voltage: ${voltage_cal}
      gain_ct: ${current_cal}
    frequency:
      name: ${device_name} Frequency
    line_frequency: 60Hz
    gain_pga: 1X
    update_interval: ${update_time}

  # ──────────────────────────────────
  # IC2: Channels 4-6 (CS pin 4)
  # ──────────────────────────────────
  - platform: atm90e32
    cs_pin: 4
    phase_a:
      current:
        name: ${device_name} CT4 Amps
        id: ct4Amps
      power:
        name: ${device_name} CT4 Watts
        id: ct4Watts
      gain_voltage: ${voltage_cal}
      gain_ct: ${current_cal}
    phase_b:
      current:
        name: ${device_name} CT5 Amps
        id: ct5Amps
      power:
        name: ${device_name} CT5 Watts
        id: ct5Watts
      gain_voltage: ${voltage_cal}
      gain_ct: ${current_cal}
    phase_c:
      current:
        name: ${device_name} CT6 Amps
        id: ct6Amps
      power:
        name: ${device_name} CT6 Watts
        id: ct6Watts
      gain_voltage: ${voltage_cal}
      gain_ct: ${current_cal}
    line_frequency: 60Hz
    gain_pga: 1X
    update_interval: ${update_time}

  # ──────────────────────────────────
  # Calculated: Total Home Power
  # (CT1 = Main Leg 1, CT2 = Main Leg 2)
  # ──────────────────────────────────
  - platform: template
    name: ${device_name} Total Watts
    id: totalWatts
    lambda: "return id(ct1Watts).state + id(ct2Watts).state;"
    accuracy_decimals: 1
    unit_of_measurement: W
    device_class: power
    update_interval: ${update_time}

  - platform: total_daily_energy
    name: ${device_name} Total Daily Energy
    power_id: totalWatts
    unit_of_measurement: kWh
    accuracy_decimals: 2
    filters:
      - multiply: 0.001

# Diagnostic sensors
  - platform: wifi_signal
    name: "${device_name} WiFi Signal"
    update_interval: 60s
    
  - platform: uptime
    name: "${device_name} Uptime"
    update_interval: 60s

time:
  - platform: homeassistant
    id: homeassistant_time

text_sensor:
  - platform: wifi_info
    ip_address:
      name: "${device_name} IP Address"
    ssid:
      name: "${device_name} Connected SSID"
    bssid:
      name: "${device_name} BSSID"

# Watchdog to auto-reboot if things go wrong
interval:
  - interval: 5min
    then:
      - if:
          condition:
            and:
              - lambda: 'return millis() > 300000;'  # >5 min uptime
              - not:
                  wifi.connected:
          then:
            - logger.log: "Wi-Fi not connected for 5 min, rebooting..."
            - delay: 10s
            - lambda: 'App.safe_reboot();'