Lanbon L8

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Models~

L8-HS: 3 Relays - load up to 200W/gang
L8-HD: 1 Dimmer - load up to 200W/gang - not tested!
L8-HT: Thermostat switch - not tested!
L8-HB: Boiler switch - not tested!

Form factor~

EU model: 86mm x 86mm
US model: 120mm x 74mm

Bezel Color~

Black
White

Features:~

Input voltage 110-250V ~ 50-60Hz AC
ESP32-WROVER-B
Capacitive touch screen
Energy counter

Note

An earlier revision V1.14 (20191203) of the PCB had an analog temperature sensor onboard. It was removed from V1.15 (20200521) of the PCB. You are likely not to get it when buying a recent switch.

Contents~

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Flashing~

Disclaimer

Never connect high-voltage when the panel is not properly secured in place.

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You can follow this flashing guide on blakadder.com or this discussion post with instructions and photos to flash the firmware without having to open the device.

Steps:

Disengage the high-voltage power
Detach the panel from the PSU power supply
Connect RX, TX, IO0, GND and power pins to the female pinheader:
- Either supply 3.3V or 5V on the corresponding power pin, depending on the voltage supplied by the UART ttl (not both at the same time).
Because there is no RESET pin, you need to powercycle the board to activate flash mode

Once the serial connections are made, flash the Lanbon-L8 ESP32 firmware like any other device.

GPIO Settings~

Pin	L8-HS	Group	Default
12	Relay K3	1	Low
14	Relay	2	Low
26	Mood Red	4	Low
27	Relay	3	Low
32	Mood Green	5	Low
33	Mood Blue	6	Low

To configure all GPIOs at once use this command:

config/gpio {"config":[2360346,2491680,2623009,2097420,2097678,2097947,0,0]}

When using MQTT send to topic hasp/<nodename>/config/gpio a message with payload

{"config":[2360346,2491680,2623009,2097420,2097678,2097947,0,0]}

Pin	L8-HD	Group	Default
12	Dimmer TX (K3)	1	Low
26	Mood Red	4	Low
32	Mood Green	5	Low
33	Mood Blue	6	Low

Note

You can create you own firmware build with GPIOs and many other parameters pre-configured in user_config_override.h as factory defaults for Lanbon L8.

Wiring Diagrams~

The switch supports several wiring configurations:

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Video~

YOUTUBE

LCD Configuration~

The lcd_config.ini file specifies the different properties of the display, except for the actual pin configuration:

st7789v =
    -D ST7789_DRIVER=1
    ;-D CGRAM_OFFSET=1         ; Library will add offsets required
    -D TFT_SDA_READ            ; Read from display, it only provides an SDA pin
    -D TFT_WIDTH=240
    -D TFT_HEIGHT=320
    -D TFT_ROTATION=2          ; see TFT_ROTATION values
    ; -D TFT_INVERSION_OFF     ; for normal colors
    ; -D TFT_RGB_ORDER=TFT_RGB   ; Colour order Red-Green-Blue
    -D TFT_RGB_ORDER=TFT_BGR ; Colour order Blue-Green-Red
    -D SPI_FREQUENCY=80000000
    -D SPI_READ_FREQUENCY=6000000 
    -D USER_SETUP_LOADED=1
    -D SUPPORT_TRANSACTIONS

HASP build_flags~

Specify the LCD Configuration to use and define the GPIOs in the environment build flags:

build_flags =
    ${env.build_flags}
    ${esp32.build_flags}
    ${esp32.ps_ram}

;region -- TFT_eSPI build options ------------------------
    ${lcd.st7789v}
    -D LANBONL8
    -D TFT_RST=18        ; FCP pin2 RESET
    -D TFT_SCLK=19       ; FCP pin3 SCL
    -D TFT_DC=21         ; FCP pin4 D/C
    -D TFT_CS=22         ; FCP pin5 CS
    -D TFT_MOSI=23       ; FCP pin6 SDA
    -D TFT_MISO=25       ; FCP pin7 SDO
    -D TFT_BCKL=5
    -D TOUCH_DRIVER=5206
    -D TOUCH_SDA=4
    -D TOUCH_SCL=0
    -D TOUCH_IRQ=-1   ; not connected
    -D TOUCH_RST=-1   ; not used, connected to 3.3V on FCP pin10
    -D TOUCH_FREQUENCY=400000
    -D LED_RED=26
    -D LED_GREEN=32
    -D LED_BLUE=33
    -D RELAY_1=12
    -D RELAY_2=24
    -D RELAY_3=37
;endregion