light_meter_display.yaml

substitutions:
  device_name: light_meter_display
  upper_device_name: Light Meter Display

esphome:
  name: $device_name
  platform: ESP8266
  board: d1_mini

wifi: !include include/wifi_iot.yaml

captive_portal:

web_server:
  port: 80

# Enable logging
logger:
  level: INFO

# Enable Home Assistant API
# api:

ota:

mqtt: !include include/mqtt.yaml
    
i2c:
      
button:
  - platform: restart
    name: $upper_device_name Restart
    
sensor:
  
  - platform: wifi_signal
    name: $upper_device_name WiFi Signal
    update_interval: 30min
    icon: mdi:wifi
    
  - platform: max44009
    name: $upper_device_name Light Sensor
    id: als
    address: 0x4A
    update_interval: 2s
    accuracy_decimals: 2
    filters:
      - filter_out: -30.0
      - lambda: |-
          float pr_delta;
          if(x < 3) {
            pr_delta = .4;
          } else if ( x < 10) {
            pr_delta = .6;
          } else if (x < 20) {
            pr_delta = 1.0;
          } else if (x < 80) {
            pr_delta = 1.5;
          } else if (x < 200) {
            pr_delta = 2.0;
          } else {
            pr_delta = 3.0;
          }
          if (isnan(x)) 
            return {};
          if (isnan(id(als).state)) 
            return x;
          if (fabsf(x - id(als).state) >= pr_delta) 
            return x;
          return {};

    
font:
  - file: 'fonts/arial.ttf'
    id: font2
    size: 36

  - file: 'fonts/arial.ttf'
    id: font3
    size: 14

display:
  - platform: ssd1306_i2c
    model: "SH1106 128x64"
    rotation: 180°
    reset_pin: D0
    address: 0x3C
    lambda: |-
      it.printf(40, 2, id(font3), TextAlign::TOP_CENTER, "Luxmeter");

      it.printf(10, 55, id(font2), TextAlign::BASELINE_LEFT, "%.2f", id(als).state);