Skip to content

Lanbon L8~

Models~

  • L8-HS: 3 Relays - load up to 200W/gang
  • L8-HD: 1 Dimmer - load up to 200W/gang
  • L8-HB: Boiler switch - load up to 16A
  • L8-HT: Thermostat switch - not tested!

Warning

Choose a model that works with Apple HomeKit because those are WiFi versions with the internal antenna connected to the ESP32.

Do NOT buy a version that is powered by Tuya Smart Life because the internal antenna is connected to the Tuya chip. Those devices will have very bad WiFi reception of the ESP32!

Form factor~

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

All models are rated at AC 100-250V ~50-60Hz, the form factor can be a design choice regardless of the continental area.

The models have the same recessed housing sliding into the wall, sized 50x50mm, with rounded corners creating a diameter of about 59mm. This makes them suitable for both EU and US wall fixtures. The EU model fits in a properly deployed, standard 60mm round wall box and can be fixed with two side screws (use the screws which belong to the box instead of the ones shipped with the device), the US model fits in the standard rectangular box and can be fixed through the oval holes located 3 1/4" apart. The depth of the wall box has to be at least 35-40mm because some room is needed for the wires coming out straight of the device.

Bezel Color~

  • Black
  • White

Features:~

  • Input voltage 110-250V ~ 50-60Hz AC
  • ESP32-WROVER-B
  • Capacitive touch screen
  • Energy counter
Pros Cons
8 MB flash Mood LEDS not uniform
8 MB PSram
Capactitive touch
Built-in PSU
Energy monitor
Standard wallmount form factor both EU and US

Buy

Note 1

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.

Note 2

There is a new V1.17 of the PCB with Tuya support. openHASP does not support the proprietary Tuya chip, but you can still flash the firmware and use the other Lanbon L8 features just fine.

Contents~

Display image

Flashing~

Disclaimer

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

Display image

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:

  1. Disengage the high-voltage power
  2. Detach the panel from the PSU power supply
  3. Connect RX, TX, IO0, GND and 5V pins to the female pinheader
  4. Because there is no RESET pin, you need to powercycle the board while IO0 is connected to GND to activate flash mode

Make sure you have a USB to serial adapter than can provide sufficient power on the 5V pin. Once the serial connections are made, flash the Lanbon-L8 ESP32 binary like on any other device.

GPIO Settings~

3-gang version L8-HS~

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

Tip

To configure the GPIOs as light switches at once for L8-HS send to topic hasp/<nodename>/config/gpio a message with payload:

1
{"config":[197658,263456,329249,655628,655886,656155,0,0]}
Or for power switches: 
1
{"config":[721164,721422,197658,721691,263456,329249,0,0]}
The difference is only the device class you want them to be autodetected as in Home Assistant: light vs. switch

Example jsonl

To create a page displaying the local relays as switches, try this very simple pages.jsonl: 

1
2
3
{"page":1,"id":1,"obj":"switch","x":30,"y":40,"w":180,"h":75,"radius":40,"radius20":40,"groupid":1}
{"page":1,"id":2,"obj":"switch","x":30,"y":122,"w":180,"h":75,"radius":40,"radius20":40,"groupid":2}
{"page":1,"id":3,"obj":"switch","x":30,"y":205,"w":180,"h":75,"radius":40,"radius20":40,"groupid":3}
lanbon-3-switch-display

Dimmer version L8-HD~

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

Warning

There are two versions of the dimmer configuration: EU and AU. The protocol used to command the dimmer module differs between the two! Make sure that you have the correct type configured under your GPIO Output settings for pin 12. Use the AU configuration for any 120V/US compatible dimmer modules.

Tip

To configure the GPIOs at once for L8-HD send to topic hasp/<nodename>/config/gpio a message with payload: EU version: 

1
{"config":[3211532,197658,263456,329249,0,0,0,0]}

AU/US version: 

1
{"config":[3277068,197658,263456,329249,0,0,0,0]}

Boiler version L8-HB~

Pin Mode L8-HB Group Default
26 Output Mood Red 4 Low (Normal)
27 Output Relay 16A (K1) 1 Low (Normal)
32 Output Mood Green 5 Low (Normal)
33 Output Mood Blue 6 Low (Normal)

Tip

To configure the GPIOs at once for L8-HB send to topic hasp/<nodename>/config a message with payload:

1
{"gpio":{"config":[197658,263456,329249,721179,14,27,0,0]}}

Developer Note

You can build your own firmware 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:

Display image

Warning

Always follow the instructions from the installation guide and local safety regulations. Consult a licensed electrician when changing your electrical wiring.

Product Video~

LCD Configuration~

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

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
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:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
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=6336
    -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