Custom ESPHome component for the Zemismart WiFi slide curtain (new design).
Even though Tasmota has an integration for the slide curtain available, I would like to integrate this into a custom component for ESPHome since i'm a huge fan of the native API between Home Assistant and ESPHome.
Inspiration and fragments of the code came from fellow developers iphong and brandond, please feel free to take a look at their repositories.
- ESPHome custom components for Tuya curtain includes feedback and position support
- ESPHome support for cheap WiFi PIR sensors
- Automatically sends a heartbeat message every 10 seconds
- Controls open, close, stop and custom position (0 up to 100)
- Position feedback once the curtain motor stops
- Hass Services:
- get_status_report returns the status of all dpids. (e.g. to retrieve position information after HA reboot)
- set_motor_normal and set_motor_reversed sets the operation mode.
- send_command can be used to manually send commands to the motor.
During development I observed strange behaviour when using the commands open, stop and close. The included crc appears to be incorrect however, the command is still executed correctly by the motor. Bug in the embedded software of the Tuya module perhaps?
Open:
TX: 55AA00060005010400010212
RX: 55AA03070005010400010215 Included CRC = 0x15 calculated CRC = 0x16
Close:
TX: 55AA00060005010400010010
RX: 55AA03070005010400010013 Included CRC = 0x13 calculated CRC = 0x14
Stop:
TX: 55AA00060005010400010111
RX: 55AA03070005010400010114 Included CRC = 0x14 calculated CRC = 0x15
The Zemismart slide curtain is driven by the ZZM79E-DT motor. After removing the back cover the Tuya TYWE1S module is exposed. The module is soldered on a small break-out PCB, connecting directly to the motor using a 6 pin 2 mm header. The datasheet for this module can be found here: TYWE1S Module Datasheet-Documentation-Tuya Developer
Using the multimeter the following pinout is obtained (pinout table matches the picture):
| Pin Number : | Function: | Pin Number: | Function: |
|---|---|---|---|
| 1 | GND | 2 | VCC |
| 3 | GND | 4 | 3V3 |
| 5 | U1RX | 6 | U1TX |
The exact curtain I ordered can be found here (link might be broken in the future):
The first step was to analyse the traffic between the Tuya Module and the curtain motor using a logic analyser. All communication within this chapter is described from the Tuyas Module point of view.
- TX = Tuya Module -> Motor MCU
- RX = Tuya Module <- Motor MCU
1) Detecting heartbeat
TX: 55AA00000000FF
RX: 55AA030000010003 (0x00 indicates the first heartbeat)
2) Querying product information
TX: 55AA0001000000
RX: 55AA0301002A7B2270223A222A2A2A2A2A2A2A2A2A2A2A2A2A2A2A2A222c2276223A22312E302E30222C226D223A307DB3
{"p":"****************","v":"1.0.0","m":0}
3) Querying working mode
TX: 55AA0002000001
RX: 55AA0302000004 (0x0000 indicates coordination mode with MCU)
4) Querying Status (Async)
TX: 55AA0008000007
RX: 55AA03070005010400010216 (dpid 1 - curtain control)
RX: 55AA0307000803020004000000001A (dpid 8 - motor direction)
RX: 55AA03070005050100010116 (dpid 5 - motor direction)
RX: 55AA0307000507040001011B (dpid 7 - unknown)
RX: 55AA030700050A050001001E (dpid 10 - error report)
5) Reporting device network status (Wi-Fi has been configured but not connected to the router)
TX: 55AA000300010205
RX: 55AA0303000005
6) Reporting device network status (Wi-Fi has been configured and connected to the router.)
TX: 55AA000300010306
RX: 55AA0303000005
7) Reporting device network status (Wi-Fi has been connected to the router and the cloud.)
TX: 55AA000300010407
6) Detecting heartbeat
TX: 55AA00000000FF
RX: 55AA030000010104
Control commands
Open:
TX: 55AA00060005010400010212
RX: 55AA03070005010400010215
RX: 55AA0307000803020004000000647E (Reports position on stop)
Stop:
TX: 55AA00060005010400010111
RX: 55AA03070005010400010114
RX: 55AA03070008030200040000002B42 (Reports position on stop)
Close:
TX: 55AA00060005010400010010
RX: 55AA03070005010400010013
RX: 55AA0307000803020004000000001A (Reports position on stop)
Motor direction set normal operation:
TX: 55AA00060005050100010011
RX: 55AA03070005050100010015
Motor direction set reversed operation:
TX: 55AA00060005050100010112
RX: 55AA03070005050100010116
Control by remote or pull curtain
Open/Stop/Close:
RX: 55AA0307000507040001001A (same response for open/stop/close)
RX: 55AA0307000803020004000000001A (Reports position on stop)
Close + curtain blocked:
RX: 55AA0307000507040001001A
RX: 55AA030700050A0500010220
RX: 55AA0307000803020004000000001A (Reports position on stop)