MAX7219 Display with ESPHome

livingroom.yaml

esphome:
  name: livingroom

esp8266:
  board: esp01_1m

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: ""
ota:
  password: ""

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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Livingroom Fallback Hotspot"
    password: ""

captive_portal:

switch:
  - platform: gpio
    name: "LED3"
    pin:
      number: 16
      inverted: true

spi:
  clk_pin: 5
  mosi_pin: 4

display:
  - platform: max7219digit
    id: my_display
    cs_pin: 0
    num_chips: 4
    intensity: 1
    update_interval: 1s
    lambda: |-
      std::string s = id(elec).state;
      std::string delimiter = ".";
      std::string token = s.substr(0, s.find(delimiter));
      switch (id(page)){
        case 1:
          it.printf(0, 0, id(pixel_font), "%s%s", id(garage).state.c_str(), id(hatxt).state.c_str() );
          break;
        case 2: 
          it.strftime(0, 0, id(pixel_font), "%H:%M", id(now).now());
          break;
        case 3: 
          // it.printf(0, 0, id(pixel_font), "Hello World       .");
          it.printf(0, 0, id(pixel_font), "%sW", token.c_str() );
          break;
        case 4:
          it.printf(0, 0, id(pixel_font), "%s%s", id(temp).state.c_str(), id(hatxt).state.c_str() );
          break;
        }
           
font:
  - file: "../pixelmix.ttf"
    id: pixel_font
    size: 8

text_sensor:
  - platform: homeassistant
    name: "Display Text"
    id: hatxt
    entity_id: input_text.display
  - platform: homeassistant
    name: "Garage Temp"
    id: garage
    entity_id: sensor.garage_os_temperature
  - platform: homeassistant
    name: "Electric"
    id: elec
    entity_id: sensor.el_electric_consumption_w
  - platform: homeassistant
    name: "Living Room Temp"
    id: temp
    entity_id: sensor.living_room_os_temperature

time:
  - platform: sntp
    id: now

globals:
- id: page
  type: int
  initial_value: "1"

interval:
- interval: 10s
  then:
    - lambda: |-
        id(page) = (id(page) + 1);
        if (id(page) > 4) {
          id(page) = 1;
        }