ESP Home: Does anyone have a working custom i2c configuration? Can I learn from it?

Configuration
1

It is hard to be a newbie and get stuck.
I try to operate a custom i2c device at an esp8266.
Trust me. I have read the docs I found. I googled the whole web. But no success!

If you interested in, I can show all my tries in yaml and headers. It would not help. At the moment I am confused with components and devices, output and outputs, inheritance, float and custom float.

Maybe your working ESP Home custom i2c device config helps me out.

Thank you in advance
Christian

2

Here is a working example with i2c and dallas:
EDIT: Sorry I did not read “custom” before answer so this is probably not what you asked for…

esphome:
  name: rp1
  platform: ESP8266
  board: esp01_1m

wifi:
  ssid: "xxxx"
  password: "00000"
  output_power: 17.0

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:
# i2c sensors
i2c:
  sda: 4
  scl: 5
  scan: True

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO0
      mode: INPUT_PULLUP
      inverted: True
    name: "RP1-Button"
    on_press:
      - switch.toggle: relay

switch:
  - platform: gpio
    name: "RP1-Relay"
    pin: GPIO12
    id: relay

status_led:
  pin:
    number: GPIO13
    inverted: yes

ads1115:
  - address: 0x48

dallas:
  - pin: GPIO14

sensor:
  - platform: dallas
    address: 0xE00517A04E52FF28
    name: "RP1-OutTemp"

# Temp and Hum
  - platform: bme280
    temperature:
      name: "RP1-InTemp"
      oversampling: 16x
    pressure:
      name: "RP1-In-Pressure"
    humidity:
      name: "RP1-In-Humidity"
    address: 0x76
    update_interval: 60s
  - platform: ina219
    address: 0x40
    shunt_resistance: 0.001 ohm
    current:
      name: "RP1-SolarAmp"
      unit_of_measurement: A
      filters:
        - multiply: 20
      accuracy_decimals: 2
    power:
      name: "RP1-SolarWatt"
      unit_of_measurement: W
      filters:
        - multiply: 20
      accuracy_decimals: 2
    bus_voltage:
      name: "RP1-SolarVolt"
      filters:
        - multiply: 1.0
      accuracy_decimals: 2
    shunt_voltage:
      name: "RP1-SolarShunt-mV"
      unit_of_measurement: mV
      filters:
        - multiply: 1000
    max_voltage: 32.0V
    max_current: 3.2A
    update_interval: 5s
# Alog VCC
  - platform: adc
    pin: VCC
    name: "RP1-Vcc-A0"
    update_interval: 30s
    accuracy_decimals: 2
# Alog in
  - platform: ads1115
    multiplexer: 'A0_GND'
    gain: 6.144
    name: "RP1-HouseBatt-Volt"
    update_interval: 5s
    accuracy_decimals: 2
    unit_of_measurement: V
    filters:
      - multiply: 5.688
  - platform: ads1115
    multiplexer: 'A1_GND'
    gain: 6.144
    name: "RP1-CarBatt-Volt"
    update_interval: 10s
    accuracy_decimals: 2
    unit_of_measurement: V
    filters:
      - multiply: 5.709
  - platform: ads1115
    multiplexer: 'A2_A3'
    gain: 0.256
    name: "RP1-Charge-Amp"
    update_interval: 1s
    accuracy_decimals: 2
    unit_of_measurement: A
    filters:
      - multiply: 2000
      - sliding_window_moving_average:
          window_size: 5
          send_every: 5
3

You probably already checked here? https://esphome.io/custom/i2c.html

4

Thank you for your answers.
I can not get the example to work.
My yaml:

esphome:
  name: ac_dimmer
  platform: ESP8266
  board: nodemcuv2
  includes: my_custom_component.h  # example from the docs
    
wifi:
  ssid: "SSID"
  password: "WIFIPASS"

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

i2c: 
    sda: D2
    scl: D1
    scan: True

light:
  - platform: monochromatic
    name: "Kitchen Lights"
    output: output_component1

output:
  - platform: custom
    type: float
    id: output_component1
    lambda: |-
      return nullptr;
    outputs:
      id: custom_float

The compiler keeps claiming:
“ID ‘output_component1’ of type custom::CustomFloatOutputConstructor doesn’t inherit from output::FloatOutput”
I googled this phrase the whole web. Do not know where to read to fix this.

5

I haven’t tried any custom components yet, but from my previous Googling, these are some examples I had book marked:

https://www.reddit.com/r/Esphome/comments/h0d8ly/custom_i2c_sensor_example/

Hopefully one of them can help you out!

6

Here are three examples of custom I2C components I have implemented/collected: https://github.com/exxamalte/esphome-customisations

7

Did you not switch the SDA and SCL line to your sensor?