LoraTap SC500W Roller Shutter Switch

Hardware

GPIO Functions

GPIO Pin	Function
3	LED indicator (low level trigger)
4	Switch S1 signal (low level trigger)
5	Switch S2 signal (low level trigger)
12	Relay L1
13	Pairing button
14	Relay L2

Source: https://devices.esphome.io/devices/loratap-sc500w/ ↗

The case has three snap-fits, it’s very easy to disassemble it, PCB front side:

pcb-1

back side:

pcb-2

Luckily, the module is an ESP8285-based TYWE2S ↗, not a newer one based on the BK72XX family SoC.

Follow the datasheet, solder wires to the TX, RX, GND, 3V3 pins respectively:

flashing-wiring-1

then short the IO0 pad to GND on the back side:

flashing-wiring-2

Software

ESPHome configuration example:

substitutions:
  device_name: 'Shutter 1'

esphome:
  name: shutter-1
  comment: 'Roller shutter switch 1'

esp8266:
  board: esp8285  # 1 MB flash size
  restore_from_flash: false

preferences:
  flash_write_interval: 24h  # reduce write frequency to flash to avoid wearing it out, adjust it as needed

logger:
  level: WARN
#  baud_rate: 115200

wifi:
  fast_connect: true
  networks:
    - ssid: !secret wifi_ssid
      bssid: !secret wifi_bssid
      password: !secret wifi_password
  domain: !secret domain_name

api:
ota:
  password: !secret ota_password

button:
  # for hard restart
  - platform: restart
    id: restart_button
    name: 'Restart ${device_name}'
    entity_category: diagnostic

status_led:  # onboard LED
  pin:
    number: 3
    inverted: true

binary_sensor:
  # external switches
  - platform: gpio
    id: switch_open
    pin:
      number: 4
      inverted: true
    on_press:
      then:
        - cover.open: shutter
    on_release:
      then:
        - cover.stop: shutter
    internal: true
  - platform: gpio
    id: switch_close
    pin:
      number: 5
      inverted: true
    on_press:
      then:
        - cover.close: shutter
    on_release:
      then:
        - cover.stop: shutter
    internal: true
  # use the pairing button for hard restarting
  - platform: gpio
    id: pairing_button
    pin: 13
    on_release:
      then:
        - button.press: restart_button
    internal: true

# relays
output:
  - platform: gpio
    id: relay_open
    pin: 12
  - platform: gpio
    id: relay_close
    pin: 14

cover:
  - platform: time_based
    id: shutter
    name: '${device_name}'
    device_class: shutter
    open_action:
      - output.turn_off: relay_close
      - output.turn_on: relay_open
    open_duration: 40s  # adjust it to the actual duration to fully open
    close_action:
      - output.turn_off: relay_open
      - output.turn_on: relay_close
    close_duration: 40s  # adjust it to the actual duration to fully close
    stop_action:
      - output.turn_off: relay_open
      - output.turn_off: relay_close
    assumed_state: true

yaml

Added to Home Assistant:

hass

LoraTap SC500W Roller Shutter Switch

#Hardware

#GPIO Functions

#Software

Hardware

GPIO Functions

Software