ESP32 C3 72x40 OLED - ESPHOME

ESPHome
1

Hello

has anybody made this screen work using ESPHOME code?

image
image364×446 51 KB

can you please share your code? I’ve been trying for hours and coundt find the way to do it, I get always 100% lit scren

thanks!

2

At least post what you have done on yaml.
Does your I2C find the display address?

3

Sorry, you are completly right

My current code work, but just by trial and error about the offsets, rotation and possition:

# LCD bus I2C
i2c:
  sda: GPIO5
  scl: GPIO6
  scan: true
  id: bus_a

display:
  - platform: ssd1306_i2c
    model: "SH1107 128x128"
    rotation: 180
    update_interval: 60s  
    offset_y: 0
    offset_x: 0
    address: 0x3C
    lambda: |-
      it.print(25, 11, id(my_font), "ESP32-C3 OLED");


font:
  - file: "fonts/roboto.ttf" 
    id: my_font
    size: 12

that code works, shows and I can update the info in screen but if I use the more correct (according to the screen resolution) code:

display:
  - platform: ssd1306_i2c
    model: "SSD1306 72x40"
    rotation: 0
    update_interval: 1s  # Se refresca cada 60 segundos (toma aprox. 1s)
    offset_y: 0
    offset_x: 0
    address: 0x3C
    lambda: |-
      // Imprime "Hello World" en la posición (0,0)
      it.print(0, 0, id(my_font), "ESP32_72x40");

no matter what I write on the message, the screen shows the info I uploaded with the previous code (keeps showing ESP32-C3 OLED)

4

Then your upload didn’t complete.
You probably got some errors when complied?

What about:
# Imprime "Hello World" en la posición (0,0)

5

Finally I found a solution that works for me,

image
image1165×1415 151 KB

in case it helps someone else:

# LCD bus I2C
i2c:
  sda: GPIO5
  scl: GPIO6
  scan: true
  id: bus_a
  frequency: 800kHz

display:
  - platform: ssd1306_i2c
    model: "sh1106 128x64"
    rotation: 0
    update_interval: 60s  
    offset_y: 0
    offset_x: 0
    invert: True  # Optional
    address: 0x3C
    lambda: |-
      it.print(27, 9, id(my_font), "27x9");


font:
  - file: "fonts/roboto.ttf"   ## Choose your font from the esphome fonts folder
    id: my_font
    size: 12
2 Likes
6

Thanks a lot @poseido. I finally got mine working, after finding your post.

ESP32C3
ESP32C31149×1283 271 KB

If someone wishes to update the text from HA, here is how I do it. Just create an input_text helper named “OLED Display”.

# LCD bus I2C
i2c:
  sda: GPIO5
  scl: GPIO6
  scan: true
  id: bus_a
  frequency: 800kHz

# Display settings
display:
  - platform: ssd1306_i2c
    model: "sh1106 128x64"
    id: my_display
    rotation: 0
    update_interval: 60s  
    offset_y: 0
    offset_x: 0
    invert: false
    address: 0x3C
    lambda: |-
      it.printf(30, 18, id(my_font), "%s", id(oledtext).state.c_str());

# Font
font:
  - file: "gfonts://Roboto"
    id: my_font
    size: 16


text_sensor:
  - platform: homeassistant
    name: "oledtext"
    entity_id: input_text.oled_display
    id: oledtext
    on_value:
      then:
        - component.update: my_display
7

Actually, the proper config should be like below. Just posting it in a case that someone else like me would stumble upon this post.

Don’t forget to set up your font.

# I2C minimum settings
i2c:
  sda: GPIO5
  scl: GPIO6
  scan: true
  id: bus_i2c

# OLED SSD1306 72x40 Display settings
display:
  - platform: ssd1306_i2c
    model: "SSD1306 72x40"
    id: my_display
    rotation: 0
    update_interval: 1s  
    offset_y: 0
    offset_x: 0
    invert: true
    address: 0x3C
    lambda: |-
      it.printf(0, 0, id(my_font_12), "TEXT", id(uptime_human).state.c_str());

This way you have no issues with offsets or x/y starting points.