experiments in AC dimming (DMX 4 Chan)

esphome/esp-4chdmxdimmer1.yaml

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+##########################################################################################
+##########################################################################################
+# 4 Channel DMX Mains Dimmer
+# This is using an esp8366 (D1 Mini) sensing DMX512 Serial to a 2 channel
+# mains lighting contoller (1.2A/Channel)
+#
+# Contoller: https://www.aliexpress.com/item/32838426377.html
+# RS-485 TTL converter: https://www.aliexpress.com/item/1005005737922222.html
+#
+# V1.0 2025-09-06 First Rev (only tested one module, 2 channels at this stage, and incandescent)
+##########################################################################################
+#
+# NOTES
+# ------
+# - Trialling with an incandescent bulb, 10% writes 26.  Max value is 255 so this is 10%
+# - With an incandescent, I can't see any light output below about 15%
+# - Using GPIO2 as the UART TX on an ESP8266 is handy, as the onboard LED flashes with TX
+# - The dimmer needs to be set to DMX mode, and given an ID of 1-999 (not standalone or dynamic)
+# - there is no reason you can't run many dimmers off one ESP (limit may be in data speed lags?)
+# - The dimmer is pretty smooth, and it remembers values even if no data being transmitted.
+#
+# System Settings on Dimmer: (onboard buttons M and < held for 2 secs)
+# ------
+# - Set "1 Channel" (d-1) and both channels will output the same levels. Or "2 Channel" (d-2)
+# - Set reverse phase dimming/trailing edge (C-R) or Forward/Leading Edge (C-F)
+# - Set minimum brightness on the dimmer, from b01-b40.  Min is then 5% if b01
+# - Set the 3x 8 Segment display to automatically turn off (Bon/BoF) after a period
+# - pull both DE & RE high on the 485 converter to ensure data enabled (or wire to enable_pin)
+#
+# MAX485 Module (You could also use a MAX3485 which is 3.3V)
+# ------
+# MAX485 VCC  ->   ESP +5V
+# MAX485 GND  ->   ESP GND
+# MAX485 DE   ->   ESP +5V
+# MAX485 RE   ->   Has a pullup so can leave unconnected, (or +5V)or an designated enable_pin
+# MAX485 DI   ->   ESP32 GPIO5 or ESP8266 GPIO2
+# MAX485 A    ->   XLR 3 (DMX +)
+# MAX485 B    ->   XLR 2 (DMX -)
+# MAX485 GND  ->   XLR 1 (DMX GND)
+#
+# Other useful references
+# ------
+# - Arduino DMX Controller https://www.youtube.com/watch?v=4PjBBBQB2m4
+# - ESP32 DMX Contoller with ESPixelstick (errors in his wiring diagram) 
+#     https://www.youtube.com/watch?v=GWZ63vsKzT8
+# - ESPHome DMX512 Custom component used here: https://github.com/andyboeh/esphome-dmx512
+#     Includes good examples if you are expanding
+##########################################################################################
+##########################################################################################
+
+##########################################################################################
+# SPECIFIC DEVICE VARIABLE SUBSTITUTIONS
+# If NOT using a secrets file, just replace these with the passwords etc (in quotes)
+##########################################################################################
+substitutions:
+  # Device Naming 
+  device_name: "esp-4chdmxdimmer1"
+  friendly_name: "4 Channel DMX Dimmer 1"
+  description_comment: "4 Channel Mains Lighting Dimmer using DMX512 protocol"
+  device_area: "Lounge" # Allows ESP device to be automatically linked to an 'Area' in Home Assistant.  
+
+  # Project Naming
+  project_name: "Generic ESP8266.D1 Mini" # Project Details 
+  project_version: "v1.0"  # Project V denotes release of yaml file, allowing checking of deployed vs latest version
+
+  # Passwords & Secrets
+  api_key: !secret esp-api_key # unfortunately you can't use substitutions inside secrets names
+  ota_pass: !secret esp-ota_pass # unfortunately you can't use substitutions inside secrets names
+  static_ip_address: !secret esp-4chdmxdimmer1_ip
+
+  # Device Settings
+  #relay_icon: "mdi:lightbulb-group"
+  log_level: "DEBUG" # Define logging level: NONE, ERROR, WARN, INFO, DEBUG (Default), VERBOSE, VERY_VERBOSE
+  update_interval: "60s" # update time for for general sensors etc
+
+#########################################################################################
+# PACKAGES: Included Common Packages
+# https://esphome.io/components/packages.html
+##########################################################################################
+# Comment some of these out where not needed, eg MQTT, Web portal, SNTP, General Sensors
+##########################################################################################
+packages:
+  common_wifi: !include
+    file: common/network_common.yaml
+    vars:
+      local_device_name: "${device_name}"
+      local_static_ip_address: "${static_ip_address}"
+      local_ota_pass: "${ota_pass}"
+  common_api: !include
+    file: common/api_common.yaml
+    vars:
+      local_api_key: "${api_key}"
+  #common_webportal: !include
+  #  file: common/webportal_common.yaml
+  common_mqtt: !include
+    file: common/mqtt_common.yaml
+    vars:
+      local_device_name: "${device_name}"
+  common_sntp: !include
+    file: common/sntp_common.yaml
+  common_general_sensors: !include
+    file: common/sensors_common.yaml
+    vars:
+      local_friendly_name: "${friendly_name}"
+      local_update_interval: "${update_interval}"
+
+#########################################################################################
+# ESPHome
+# https://esphome.io/components/esphome.html
+#########################################################################################
+esphome:
+  name: "${device_name}"
+  friendly_name: "${friendly_name}"
+  comment: "${description_comment}" # Appears on the esphome page in HA
+  area: "${device_area}"
+  project:
+    name: "${project_name}"
+    version: "${project_version}"
+  on_boot:
+    priority: -100
+    then:
+      - lambda: |-
+          id(dmx_ch1_sensor).publish_state(0);
+          id(dmx_ch2_sensor).publish_state(0);
+          id(dmx_ch3_sensor).publish_state(0);
+          id(dmx_ch4_sensor).publish_state(0);
+
+#########################################################################################
+# ESP Platform and Framework
+# https://esphome.io/components/esp32.html
+#########################################################################################
+esp8266:
+  board: esp01_1m
+  #early_pin_init: False # Initialise pins early to known values. Recommended false where switches are involved. Defaults to True.
+  board_flash_mode: dout # Default is dout
+  restore_from_flash: true # restore some values on reboot
+
+mdns:
+  disabled: false # Disabling will make the build file smaller (and it is still available via static IP)
+
+preferences:
+  flash_write_interval: 0s
+
+#########################################################################################    
+# ESPHome Logging Enable
+# https://esphome.io/components/logger.html
+############################################# 
+logger:
+  level: "${log_level}"  #INFO Level suggested, or DEBUG for testing
+  baud_rate: 0 #set to 0 for no logging via UART, needed if you are using it for other serial things (eg PZEM)
+  #esp8266_store_log_strings_in_flash: false
+  #tx_buffer_size: 64
+
+#########################################################################################
+# STATUS LED
+# https://esphome.io/components/status_led.html
+#########################################################################################
+#status_led:
+#  pin:
+#    number: GPIO2
+#    inverted: yes
+
+#########################################################################################
+# UART COMPONENT
+# https://esphome.io/components/uart/
+#########################################################################################
+uart:
+  # Needed for the DMX component.
+  # This UART talks to the RS485 adaptor
+  # There is no receiving, it is a one way send
+  id: uart_bus
+  baud_rate: 250000
+  tx_pin: 
+    number: GPIO2 #ESP8266
+    allow_other_uses: true # For ESPHome >= 2023.12.0
+  stop_bits: 2
+
+##########################################################################################
+# LIGHT COMPONENT
+# https://esphome.io/components/light/
+##########################################################################################
+light:
+  - platform: monochromatic
+    name: "Test Lights Chan 1"
+    output: dmx_1
+    id: light_test_1
+    default_transition_length: 5s
+    gamma_correct: 1
+    restore_mode: RESTORE_DEFAULT_ON
+  - platform: monochromatic
+    name: "Test Lights Chan 2"
+    output: dmx_2
+    id: light_test_2
+    default_transition_length: 5s
+    gamma_correct: 1
+    restore_mode: RESTORE_DEFAULT_ON
+  - platform: monochromatic
+    name: "Test Lights Chan 3"
+    output: dmx_3
+    id: light_test_3
+    default_transition_length: 5s
+    gamma_correct: 1
+    restore_mode: RESTORE_DEFAULT_ON
+  - platform: monochromatic
+    name: "Test Lights Chan 4"
+    output: dmx_4
+    id: light_test_4
+    default_transition_length: 5s
+    gamma_correct: 1
+    restore_mode: RESTORE_DEFAULT_ON
+
+##########################################################################################
+# SENSOR COMPONENT
+# https://esphome.io/components/sensor/
+##########################################################################################
+sensor:
+  # Expose each DMX channel's current output level as 0..255 integers (post-gamma)
+  - platform: template
+    id: dmx_ch1_sensor
+    name: "DMX Ch 1 Output (0-255)"
+    icon: mdi:counter
+    #entity_category: diagnostic
+    accuracy_decimals: 0
+    update_interval: never
+    filters:
+      - round: 0
+      - clamp:
+          min_value: 0
+          max_value: 255
+
+  - platform: template
+    id: dmx_ch2_sensor
+    name: "DMX Ch 2 Output (0-255)"
+    icon: mdi:counter
+    #entity_category: diagnostic
+    accuracy_decimals: 0
+    update_interval: never
+    filters:
+      - round: 0
+      - clamp:
+          min_value: 0
+          max_value: 255
+
+  - platform: template
+    id: dmx_ch3_sensor
+    name: "DMX Ch 3 Output (0-255)"
+    icon: mdi:counter
+    #entity_category: diagnostic
+    accuracy_decimals: 0
+    update_interval: never
+    filters:
+      - round: 0
+      - clamp:
+          min_value: 0
+          max_value: 255
+
+  - platform: template
+    id: dmx_ch4_sensor
+    name: "DMX Ch 4 Output (0-255)"
+    icon: mdi:counter
+    #entity_category: diagnostic
+    accuracy_decimals: 0
+    update_interval: never
+    filters:
+      - round: 0
+      - clamp:
+          min_value: 0
+          max_value: 255
+
+##########################################################################################
+# CUSTOM COMPONENT DMX512
+# https://github.com/andyboeh/esphome-dmx512
+##########################################################################################
+external_components:
+  - source: github://andyboeh/esphome-dmx512
+
+dmx512:
+  id: dmx
+  uart_id: uart_bus
+  #enable_pin: GPIOXX (Optional, I've wire them to be always active)
+  tx_pin: 
+    number: GPIO2
+    allow_other_uses: true # For ESPHome >= 2023.12.0
+  uart_num: 1
+  #periodic_update: true     # optional. Some dimmers may turn off without regular updates.
+  #force_full_frames: false  # optional. If true the 513 byte is always sent
+  #custom_break_len: 92      # optional. Break Length.  Default is 92uS
+  #custom_mab_len: 12        # optional. Mark after Break Length. Default is 12mS
+  #update_interval: 500      # optional. Custom update interval. Default is 500mS
+
+##########################################################################################
+# OUTPUT COMPONENT
+# https://esphome.io/components/output/ledc.html
+##########################################################################################
+output:
+  # Raw DMX slots (these are the actual DMX universes/slots)
+  - platform: dmx512
+    channel: 1        # The ID we set the device to
+    universe: dmx     # The ID of the DMX512 Component
+    id: dmx_1_raw
+  - platform: dmx512
+    channel: 2        # The ID we set the device to
+    universe: dmx     # The ID of the DMX512 Component
+    id: dmx_2_raw
+  - platform: dmx512
+    channel: 3        # The ID we set the device to
+    universe: dmx     # The ID of the DMX512 Component
+    id: dmx_3_raw
+  - platform: dmx512
+    channel: 4        # The ID we set the device to
+    universe: dmx     # The ID of the DMX512 Component
+    id: dmx_4_raw
+
+  # Wrapped outputs: publish exact 0..255 to sensors, then forward float to raw DMX
+  - platform: template
+    id: dmx_1
+    type: float
+    write_action:
+      - lambda: |-
+          id(dmx_ch1_sensor).publish_state(state * 255.0f);
+          id(dmx_1_raw).set_level(state);
+
+  - platform: template
+    id: dmx_2
+    type: float
+    write_action:
+      - lambda: |-
+          id(dmx_ch2_sensor).publish_state(state * 255.0f);
+          id(dmx_2_raw).set_level(state);
+
+  - platform: template
+    id: dmx_3
+    type: float
+    write_action:
+      - lambda: |-
+          id(dmx_ch3_sensor).publish_state(state * 255.0f);
+          id(dmx_3_raw).set_level(state);
+
+  - platform: template
+    id: dmx_4
+    type: float
+    write_action:
+      - lambda: |-
+          id(dmx_ch4_sensor).publish_state(state * 255.0f);
+          id(dmx_4_raw).set_level(state);
+
+

esphome/esp-centralstairs-bottom.yaml

@@ -120,7 +120,7 @@ esp8266:
 #########################################################################################    
 # ESPHome Logging Enable
 # https://esphome.io/components/logger.html
-############################################# 
+######################################################################################### 
 logger:
   level: "${log_level}"  #INFO Level suggested, or DEBUG for testing
   #baud_rate: 0 #set to 0 for no logging via UART, needed if you are using it for other serial things (eg PZEM)

esphome/esp-loungemoesdimmer2.yaml

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+##########################################################################################
+##########################################################################################
+# Moes Mains Dimmer
+# Mains dimmer 150W single channel - Moes Wi-Fi Dimmer Module
+# Module swapped to a ESP-02S module (from a Tuya WB2S) 
+#
+# V1.0 2025-09-05 First Rev
+##########################################################################################
+#
+# NOTES RE TUYA COMMS FOR THIS MODULE
+# - Toggle DP1 (switch) to 1 or 0 for ON or OFF. The dimmer's MCU does the smooth ramp itself over a few seconds.
+# - We set DP2 (brightness) on a 0-1000 scale; this is the actual brightness level your firmware uses.
+# - We read DP2 back as a sensor (and also show a % view) so we can see the live target the MCU is using.
+# - DP3 is exposed only as an optional minimum-brightness limit; not touched during normal dimming unless you tune the low end.
+# - It appears that 11 is the lowest DP3 raw value.  Brightness of 1% sets this, and 2% ramps it to 19.
+# - 50% brightness is 501, so it is pretty linear (you can't set Gamma, see below - I guess you could script it though)
+# - DP4 (mode) exists but left alone (unless you want to experiment with load type/behavior).  I can't see it do anything.  Disabled by default in HA.
+# - gamma_correct supposedly remaps the HA slider (no Tuya traffic) BUT it must be set to 1 or weird behaviour (keeps ramping to 0)
+# - setting logs to DEBUG will show what is happening with Tuya commands
+#
+##########################################################################################
+##########################################################################################
+
+##########################################################################################
+# SPECIFIC DEVICE VARIABLE SUBSTITUTIONS
+# If NOT using a secrets file, just replace these with the passwords etc (in quotes)
+##########################################################################################
+substitutions:
+  # Device Naming 
+  device_name: "esp-loungemoesdimmer2"
+  friendly_name: "Lounge Lighting Moes Dimmer 2"
+  description_comment: "tba"
+  device_area: "Lounge" # Allows ESP device to be automatically linked to an 'Area' in Home Assistant.  
+
+  # Project Naming
+  project_name: "Generic ESP8266.ESP-02S" # Project Details 
+  project_version: "v1.0"  # Project V denotes release of yaml file, allowing checking of deployed vs latest version
+
+  # Passwords & Secrets
+  api_key: !secret esp-api_key # unfortunately you can't use substitutions inside secrets names
+  ota_pass: !secret esp-ota_pass # unfortunately you can't use substitutions inside secrets names
+  static_ip_address: !secret esp-loungemoesdimmer2_ip
+
+  # Device Settings
+  #relay_icon: "mdi:lightbulb-group"
+  log_level: "INFO" # Define logging level: NONE, ERROR, WARN, INFO, DEBUG (Default), VERBOSE, VERY_VERBOSE
+  update_interval: "60s" # update time for for general sensors etc
+
+#########################################################################################
+# PACKAGES: Included Common Packages
+# https://esphome.io/components/packages.html
+##########################################################################################
+# Comment some of these out where not needed, eg MQTT, Web portal, SNTP, General Sensors
+##########################################################################################
+packages:
+  common_wifi: !include
+    file: common/network_common.yaml
+    vars:
+      local_device_name: "${device_name}"
+      local_static_ip_address: "${static_ip_address}"
+      local_ota_pass: "${ota_pass}"
+  common_api: !include
+    file: common/api_common.yaml
+    vars:
+      local_api_key: "${api_key}"
+  #common_webportal: !include
+  #  file: common/webportal_common.yaml
+  common_mqtt: !include
+    file: common/mqtt_common.yaml
+    vars:
+      local_device_name: "${device_name}"
+  common_sntp: !include
+    file: common/sntp_common.yaml
+  common_general_sensors: !include
+    file: common/sensors_common.yaml
+    vars:
+      local_friendly_name: "${friendly_name}"
+      local_update_interval: "${update_interval}"
+
+#########################################################################################
+# ESPHome
+# https://esphome.io/components/esphome.html
+#########################################################################################
+esphome:
+  name: "${device_name}"
+  friendly_name: "${friendly_name}"
+  comment: "${description_comment}" # Appears on the esphome page in HA
+  area: "${device_area}"
+  project:
+    name: "${project_name}"
+    version: "${project_version}"
+
+#########################################################################################
+# ESP Platform and Framework
+# https://esphome.io/components/esp32.html
+#########################################################################################
+esp8266:
+  board: esp01_1m
+  #early_pin_init: False # Initialise pins early to known values. Recommended false where switches are involved. Defaults to True.
+  board_flash_mode: dout # Default is dout
+
+#########################################################################################    
+# ESPHome Logging Enable
+# https://esphome.io/components/logger.html
+############################################# 
+logger:
+  level: "${log_level}"  #INFO Level suggested, or DEBUG for testing
+  baud_rate: 0 #set to 0 for no logging via UART, needed if you are using it for other serial things (eg PZEM)
+  #esp8266_store_log_strings_in_flash: false
+  #tx_buffer_size: 64
+
+#########################################################################################
+# STATUS LED
+# https://esphome.io/components/status_led.html
+#########################################################################################
+status_led:
+  pin:
+    number: GPIO2
+    inverted: yes
+
+#########################################################################################
+# UART COMPONENT
+# https://esphome.io/components/uart/
+#########################################################################################
+uart:
+  # Needed for the Tuya component.
+  # This UART talks to the coprocessing tuya chip
+  tx_pin: GPIO1
+  rx_pin: GPIO3
+  baud_rate: 9600
+
+#########################################################################################
+# TUYA MCU COMPONENT
+# https://esphome.io/components/tuya/
+#########################################################################################
+tuya:
+  # logger baud_rate must be 0
+  id: tuyamcu
+
+##########################################################################################
+# LIGHT COMPONENT
+# https://esphome.io/components/light/
+##########################################################################################
+light:
+  - platform: tuya
+    name: "Lounge Lighting Moes Dimmer 1"
+    switch_datapoint: 1          # ON/OFF
+    dimmer_datapoint: 2          # <-- CHANGED: brightness is DP2 on your unit
+    #min_value_datapoint: 3       # optional; comment this out if it misbehaves
+    min_value: 0
+    max_value: 1000
+    gamma_correct: 1.0
+    default_transition_length: 0s
+
+##########################################################################################
+# SENSOR COMPONENT
+# https://esphome.io/components/sensor/
+##########################################################################################
+sensor:
+  # The raw value sent over the UART 
+  # Listed as a dignostic, so will appear with the other diags in HA
+  - platform: tuya
+    id: dp2_brightness_raw
+    name: "Brightness (DP2 raw)"
+    sensor_datapoint: 2
+    entity_category: diagnostic
+  # Raw value as a percentage of max
+  - platform: template
+    name: "Brightness (%)"
+    unit_of_measurement: "%"
+    accuracy_decimals: 0
+    update_interval: 2s
+    lambda: |-
+      if (isnan(id(dp2_brightness_raw).state)) return NAN;
+      return (id(dp2_brightness_raw).state / 1000.0f) * 100.0f;
+
+##########################################################################################
+# SELECT COMPONENT
+# https://esphome.io/components/select/
+##########################################################################################
+select:
+  # Experimental
+  - platform: tuya
+    id: dp4_mode
+    name: "DP4 Mode (experiment)"
+    enum_datapoint: 4
+    options:
+      0: "Mode 0"
+      1: "Mode 1"
+      2: "Mode 2"
+      3: "Mode 3"
+      4: "Mode 4"
+      255: "Default/Unknown"
+    entity_category: config
+    disabled_by_default: true