?> TuyaMCU - Module (54) is configured for devices with a Tuya Wi-Fi module and a secondary MCU.

Originally, in those devices, the Wi-Fi module takes care of network and software features. Meanwhile, the MCU controls the hardware based on commands received from the Wi-Fi module or built-in controls (buttons, switches, remotes and similar) and reports the status back to the Wi-Fi module.

TuyaMCU module facilitates communication between Tasmota and the MCU using Tuya Serial Port Communication Protocol:

TuyaMCU command maps device functions to Tasmota components
TuyaSend<x> command calculates and sends complex serial commands using only two parameters
TuyaReceived response interprets status messages and publishes a JSON payload to an MQTT topic

TuyaMCU Command

Command TuyaMCU is used to map Tasmota components to Tuya device dpId's.

[!WARNING] Used only if your device is defined as module TuyaMCU (54).

Command value consists of two comma separated parameters: fnId and dpId.

TuyaMCU <fnId>,<dpId>

where <fnId> is a Tasmota component and <dpId> is the dpId to map the function to.

[!EXAMPLE] TuyaMCU 11,1 maps Relay1 (fnId 11) to dpId 1.

If any existing entry with same fnId or dpId is already present, it will be updated to the new value.

Entry is removed when fnId or dpId is 0.

When no parameters are provided TuyaMCU prints the current mapped values.

dpId

All the device functions controlled by the MCU are identified by a dpId.
Whenever a command is sent to the MCU, this dpId determines which component needs to be controlled and the applies when the status is received from MCU.

There is no way to autodetect dpId's and their functions.

Use this procedure to determine which dpId's are available:

Go to Configure -> Console option in Tasmota web interface.
Use command weblog 4 to enable verbose logging in web interface.

Observe the log. After every 9-10 seconds you should see log messages similar to:

TYA: Heartbeat
TYA: RX Packet: "55aa0107000501010001000f"
TYA: FnId=0 is set for dpId=1
TYA: RX Packet: "55aa01070005020100010010"
TYA: FnId=0 is set for dpId=2
TYA: RX Packet: "55aa01070005030100010011"
TYA: FnId=0 is set for dpId=3
TYA: RX Packet: "55aa01070005040100010012"
TYA: FnId=0 is set for dpId=4
TYA: RX Packet: "55aa0107000807020004000000001c"
TYA: FnId=0 is set for dpId=7
TYA: RX Packet: "55aa0107000808020004000000001d"
TYA: FnId=0 is set for dpId=8
TYA: RX Packet: "55aa0107000809020004000000001e"
TYA: FnId=0 is set for dpId=9
TYA: RX Packet: "55aa010700080a020004000000001f"
TYA: FnId=0 is set for dpId=0
TYA: RX Packet: "55aa0107000865020004000000007a"
TYA: FnId=0 is set for dpId=101
TYA: RX Packet: "55aa0107000866020004000000007b"
TYA: FnId=0 is set for dpId=102
TYA: RX Packet: "55aa0107000867020004000000007c"
TYA: FnId=0 is set for dpId=103
TYA: RX Packet: "55aa0107000868020004000009870d"
TYA: FnId=0 is set for dpId=104

Observe all lines printed as TYA: FnId=0 is set for dpId=XXX and note all dpId values.

Now that you have a list of usable dpId's you need to determine what their functions are:

Consulting our list of commonly used dpId's and existing device configurations
Observing Tasmota logs while activating features of the device (with a remote or on device controls) and correlating log messages
Extrapolating possible function of the dpId based on Data Type and Function Command, then testing using TuyaSend<x>

fnId

Identifier used in TuyaMCU command to map a dpId to a Tasmota component.

Component	FunctionId	Note
Switch1 to Switch4	1 to 4	Map only to dpId with on / off function
Relay1 to Relay8	11 to 18	Map only to dpId with on / off function
Dimmer	21	Only on dpId with dimming function
Power (in deci Watt)	31
Current (in milli Amps)	32
Voltage (in deci Volt)	33
Relay Inverted1 to Relay Inverted8	41 to 48	Map only to dpId with on / off function
Battery powered sensor mode	51

[!NOTE] This component is under active development which means the function list may expand in the future.

Since the majority of devices have a power on/off functions on dpId 1 its mapped to fnId 11 (Relay1) by default.

[!DANGER] Mapping a relay or switch to a dpId that is not a simple on/off function (data Type 1) might result in unwanted power toggling (f.e. dpId sends value of 4 which toggles the relay to Power 4 aka blink mode)

TuyaSend Command

Command TuyaSend is used to send commands to dpId's. It is required for dpId's that shouldn't be mapped to a fnId.

With this command it is possible to control every function of the dpId that is controllable, providing you know its data type and data length. With them provided, the rest of the protocol command is calculated.

Command's value consists of two comma separated parameters: dpId and data.

TuyaSend<x> dpId,data

There are 4 different commands, one for each data type.

`TuyaSend1`

Sends boolean (Type 1) data (0/1) to dpId (Max data length 1 byte)

[!EXAMPLE] TuyaSend1 1,0 sends vaue 0 to dpId=1 switching the device off

`TuyaSend2`

Sends integer or 4 byte (Type 2) data to dpId (Max data length 4 bytes)

[!EXAMPLE] TuyaSend2 14,100 sends value 100 to dpId=14 setting timer to 100 minutes

`TuyaSend3`

Sends string (Type 3) data to dpId ( Max data length not-known)

[!EXAMPLE] TuyaSend3 108,ff0000646464ff sends a 14 char hex string to dpId=108 (Type 3) containing RGBHSV values to control a light

`TuyaSend4`

Sends enum (Type 4) data (0/1/2/3/4/5) to dpId (Max data length 1 bytes)

[!EXAMPLE] TuyaSend4 103,2 sends value 2 to dpId=103 to set fan speed to high

TuyaReceived

Every status message from the MCU gets a JSON response named TuyaReceived which contains the MCU protocol status message inside key/value pairs which are hidden from the user by default.

To publish them to an MQTT Topic of tele/%topic%/RESULT you need to enable SetOption66 1.

Example

After issuing serial command 55aa0006000501010001010e (Device power (dpId=1) is mapped to Relay1 (fnId=11)) we get the following console output (with weblog 4):

19:54:18 TYA: Send "55aa0006000501010001010e"
19:54:18 MQT: stat/GD-30W/STATE = {"Time":"2019-10-25T19:54:18","Uptime":"0T01:45:51","UptimeSec":6351,"Heap":27,"SleepMode":"Dynamic","Sleep":0,"LoadAvg":999,"MqttCount":1,"POWER1":"ON","POWER2":"OFF","POWER3":"ON","POWER4":"OFF","POWER5":"ON","Dimmer":100,"Fade":"OFF","Speed":1,"LedTable":"OFF","Wifi":{"AP":1,"SSId":"HTPC","BSSId":"50:64:2B:5B:41:59","Channel":10,"RSSI":24,"LinkCount":1,"Downtime":"0T00:00:08"}}
19:54:18 MQT: stat/GD-30W/RESULT = {"POWER1":"ON"}
19:54:18 MQT: stat/GD-30W/POWER1 = ON
19:54:18 MQT: stat/GD-30W/RESULT = {"TuyaReceived":{"Data":"55AA0007000501010001010F","ChkSum":"0x0F","Cmnd":7,"CmndDataLen":5,"CmndData":"0101000101","DpId":1,"DpIdType":1,"DpIdLen":1,"DpIdData":"01"}}
19:54:18 TYA: fnId=11 is set for dpId=1
19:54:18 TYA: RX Relay-1 --> MCU State: On Current State:On

Above TYA: fnId=11 is set for dpId=1 you can see the JSON response for that dpId. This JSON string displays the response MCU gave to our command.

"Data" field contains the complete response and the rest of the key/value pairs show the protocol broken into parts. "DpId", "DpIdData" and "DpIdType" are the ones we're most interested in since we can use them for TuyaSend.

[!TIP] Use command SerialSend5 55aa0001000000 at any time to request statuses of all dpId's from the MCU.

Use in Rules

This data can also be used as a trigger for rules using TuyaReceivedData#Data=hex_string

Rule1 on TuyaReceived#Data=55AA000700056E040001007E do publish2 stat/tuya_light/effect rgb_cycle endon

will publish a status message to a custom topic when 55AA000700056E040001007E appears in "Data" field of the response.

Device Configurations

Before proceeding identify dpId's and their function.

Dimmers

We need to configure four functions of a dimmer:

Dimming dpId
Dimming Range
Power metering if supported.
Dimming less than 10%

Dimming dpId

The dimmer FunctionId is 21. On a dimmer dpId generally is 2 or 3. Try both.

Go to the Tasmota Console and type TuyaMCU 21,2 and wait for it to reboot.
Enter Backlog Dimmer 10; Dimmer 100 in the Console.
- If your bulb responds to Dimmer commands, you have successfully configured the dimmer FunctionId. Make note of it.
- If not try id 3 and if even 3 doesn't work keep trying Ids from all unknown Ids from the log until one works.

Dimming Range

Once you have figured out the dimming functionId, we need to find the maximum dimming range. Once the dimming Id is set, the logs will continue

TYA: Heartbeat	
TYA: RX Packet: "55aa03070005010100010011"	
TYA: RX Relay-1 --> MCU State: Off Current State:Off	
TYA: RX Packet: "55aa03070008020200040000000720"	
TYA: FnId=21 is set for dpId=2	
TYA: RX Dim State=7

Now using the hardware buttons increase the dimmer to its maximum and observe the log. The Dim State=XXX shows the current dimmer level reported by MCU. Once the dimmer is at max, note this number. Again using hardware buttons decrease dimmer to minimum and note the number for minimum. Now we need to tell Tasmota to use maximum and minimum values. This controlled by DimmerRange command. We can set it using DimmerRange <Min>,<Max> where <Min> is the minimum dimmer state and <Max> maximum dimmer state reported in logs.

Once set, try dimmer 100 in the Console and check if the brightness of bulb is same is the same as when the maximum was set using hardware buttons.

Video instructions by Digiblur

Power Metering

Some Tuya MCU devices support Power measurement support over serial. For this its better to use a bulb with known wattage rating.

Observe the logs in the Console

TYA: RX Packet: "55aa03070005010100010011"	
TYA: FnId=11 is set for dpId=1	
TYA: RX Device-1 --> MCU State: Off Current State:Off	
TYA: RX Packet: "55aa03070008020200040000000720"	
TYA: FnId=21 is set for dpId=2	
TYA: RX Dim State=7	
TYA: RX Packet: "55aa0307000803020004000000001a"	
TYA: FnId=0 is set for dpId=3	
TYA: RX Packet: "55aa0307000804020004000000251b"	
TYA: FnId=0 is set for dpId=4	
TYA: RX Packet: "55aa0307000805020004000000591c"	
TYA: FnId=0 is set for dpId=5	
TYA: RX Packet: "55aa03070008060200040000098fb5"	
TYA: FnId=0 is set for dpId=6

In the RX Packet we are interested in the 3 digits before last 2 digits. For example: 98f in "55aa03070008060200040000098fb5"

Make sure the bulb if off.
Find out the voltage standard of your country (generally 220, 240, 120v) from this table.
Multiply that number by 10 (2400) and Convert that number (2400) to Hex using any hex converter (2400 = 0x960).
Now look for the number nearest to 960 in the logs. In our case it is 98f. So we expect that's the voltage which is ID=6 in our example.
Set voltage functionId 33 by entering TuyaMCU 33,6.
Now set dimmer to 100% using the dimmer 100 command and observe the logs.
Now we need the power rating of your bulb example 9W. Multiply by 10 (90) and convert to hex which gives us 0x5A. Check which unknown ID is close to 5A. I this example it is 59 for ID=5. This is the Id of Active Power function.
Set the active power functionId 31 by entering TuyaMCU 31,5.

Once Power and Voltage are set you should see something such as this in the logs:

TYA: RX Packet: "55aa03070005010100010011"	
TYA: FnId=11 is set for dpId=1	
TYA: RX Device-1 --> MCU State: Off Current State:Off	
TYA: RX Packet: "55aa03070008020200040000000720"	
TYA: FnId=21 is set for dpId=2	
TYA: RX Dim State=7	
TYA: RX Packet: "55aa0307000803020004000000001a"	
TYA: FnId=0 is set for dpId=3	
TYA: RX Packet: "55aa0307000804020004000000251b"	
TYA: FnId=0 is set for dpId=4	
TYA: RX Packet: "55aa0307000805020004000000591c"	
TYA: FnId=31 is set for dpId=5	
TYA: Rx ID=5 Active_Power=9	
TYA: RX Packet: "55aa03070008060200040000098fb5"	
TYA: FnId=33 is set for dpId=6	
TYA: Rx ID=6 Voltage=244.7

To get the Id for the current, calculate Current = Power / Voltage ( 9 / 244.7 ) = 0.0367. Multiply this by 1000 = 36.77. Now convert 36 to hex which is 0x24. This is closest to 25 which is Id 4.
Set the current FunctionId 32 using command TuyaMCU 32,4.

Observe the logs should start showing

TYA: RX Packet: "55aa03070005010100010011"	
TYA: FnId=11 is set for dpId=1	
TYA: RX Device-1 --> MCU State: Off Current State:Off	
TYA: RX Packet: "55aa03070008020200040000000720"	
TYA: FnId=21 is set for dpId=2	
TYA: RX Dim State=7	
TYA: RX Packet: "55aa0307000803020004000000001a"	
TYA: FnId=0 is set for dpId=3	
TYA: RX Packet: "55aa0307000804020004000000251b"	
TYA: FnId=32 is set for dpId=4	
TYA: Rx ID=4 Current=312	
TYA: RX Packet: "55aa0307000805020004000000591c"	
TYA: FnId=31 is set for dpId=5	
TYA: Rx ID=5 Active_Power=9	
TYA: RX Packet: "55aa03070008060200040000098fb5"	
TYA: FnId=33 is set for dpId=6	
TYA: Rx ID=6 Voltage=2447

Power and current should change on dimming high / low. The Tasmota web UI should show power values now.

Switches

For switches we need to

Configure the number of relays.
Configure Power metering.

Number of Relays

By default, the TuyaMCU module expects a 1 gang switch. There is currenty no way to detect the number of relays present in an MCU based switch. We need to tell the number of relays to Tasmota using FunctionIDs 12 to 18 for Relay2 to Relay4.

For a 4 gang switch set TuyaMCU 12,2, TuyaMCU 13,3 and TuyaMCU 14,4 if the dpIds for Relays 2-4 are 2,3,4.

[!TIP] You can configure all at once by using Backlog TuyaMCU 12,2; TuyaMCU 13,3; TuyaMCU 14,4

Power Metering

Power metering configuration is same as for dimmers.

Curtain Motors

The Zemismart WiFi curtain motor uses a Tuya TYWE1S inside the little white dongle as a radio modem. U1TX is connected to "USB D+", U1RX is connected to "USB D-", and there is a blue LED in the dongle connected to "USB3 R-" controlled by the MCU. To flash Tasmota, we need U0RX, U0TX, and GPIO0. None of which are broken out on the PCB, so soldering or Tuya-Convert are necessary.

The stock Tuya App communicates with the PIC Micro inside the motor housing at 9600 8N1.

dpId 101 is the "partial open/partial close" command with a 4 byte field of 0-100%.
dpId 102 is a "fully open/fully close" command with a 1-byte Boolean field.
dpId 103 is unknown.

Debugging

55 aa 00 06 "deliver dp" 0005 "len=5" 66 04 00 01 <00=close100%,01=open0%> <chksum> is the fully open/close command	
07 "report dp" 0005 (len) 66 04 00 01 <00 or 01> <chksum> is the reply.	
55 aa 00 06 "deliver dp" 0008 (len=8) 65 02 00 04  <value.32 <chksum> is the move partial command	
55 aa 00 07 "report dp" 0008 (len=8) 65 02 00 04 <value.32> <chksum> is the reply.

There may first be a reply of 65 02 00 04 <oldvalue.32> before the motor engages

dpId Configuration

module 54 # TuyaMCU (will reboot)
backlog gpio1 0; gpio3 0; gpio15 107; gpio13 108 # change GPIO assignments. The dongle uses gpio15 for U1TX and gpio13 for U1RX (will reboot)
tuyamcu 21,101 # declare curtain as a dimmer (will reboot)
# no idea what a good tuyamcu xx,102 is
# no idea what a good tuyamcu xx,103 is
setoption 69 0 # allow dimmer below 25% or 10%. (won't reboot)

With these settings, the dimmer command can adjust the curtain from 100% (closed) to 1% (almost fully open, 0% is the motor limit, but 1% is the Tasmota limit?)

Things That Did Not Work

tuyamcu 1,102 # make 0x66 a button	
tuyamcu 1,103 # make 0x67 a button

Having 0x66 declared a button caused the motor to oscillate - open part way and then close again. Like Tasmota was sending the "fully open" command and then immediately cancelling it with a "partial close" command.

tuyamcu 11,102 # make 0x66 a relay	
tuyamcu 11,103 # make 0x67 a relay

Does not appear to have any impact on the curtain.

Aromatherapy Diffuser

Applies to devices using the PCB marked GD-HDFW05-v1.0.

This diffuser uses the same dpId scheme as the example protocol

Functions

dpID 1 device power: 0 = off / 1 = on
dpID 11 led power: 0 = off / 1 = on
dpID 12 error notification: 0 = ok / 1 = error
dpID 13 countdown mode options: 0 = off / 1 = 1hr / 2 = 3hr not needed with Tasmota
dpID 14 countdown status: reports value of 0...360 minutes not needed with Tasmota
dpID 103 mist strength: 0 = low / 1 = high
dpID 108 led color: 14 char value in hex (can define only RGB and send HSV value as max: RRGGBBffff6464)
dpID 110 led mode: 0 = rgb_cycle / 1 = color / 2 = white
dpID 110 led dimmer color and white modes only it is important to define 'DimmerRange 1,255'

Configuration

After applying the template and configuring Wi-Fi and MQTT issue

Backlog SetOption66 1; TuyaMCU 21,111; TuyaMCU 11,1; TuyaMCU 12,11; TuyaMCU 13,103; TuyaMCU 14,12; TuyaMCU 15,110; DimmerRange 1,255; SetOption59 1

Rule1 on TuyaReceived#data=55AA000700056E040001007E do publish2 stat/GD-30W/EFFECT rgb_cycle endon on TuyaReceived#data=55AA000700056E040001017F do publish2 stat/GD-30W/EFFECT color endon on event#rgb_cycle do tuyasend4 110,0 endon on event#color do tuyasend4 110,1 endon on event#ON do backlog tuyasend4 110,1; tuyasend 11,1 endon on event#off do tuyasend1 11,0 endon on power3#state=1 do tuyasend4 103,1 endon on power3#state=0 do tuyasend4 103,0 endon
Rule1 1

Optional rule used to prevent the device going into countdown mode (f.e. using on device controls) and complete MCU status update on restart

Rule3 on TuyaReceived#data=55AA000700050D040001011E do tuyasend4 13,0 endon on TuyaReceived#data=55AA000700050D040001021F do tuyasend4 13,0 endon on mqtt#connected do serialsend5 55aa0001000000 endon
Rule3 1

All commands in .txt

What you get

Relay1 turns the diffuser on or off in stored mist strength mode, turns led on or off in stored mode and serves as device power status
Relay2 turns light on or off and serves as light power status.
Relay3 mist strength status and control using Rule1
Relay4 is used for error status (ON = error), no control
Relay5 is used for light mode status (0 = rgb_cycle, 1 = color), no control

LED mode status is reported to mqtt topic stat/GD-30W/EFFECT and command Event is used to control some functions using TuyaSend4 command. All this is defined in Rule1

Color can be changed using TuyaSend3 108,RRGGBB64646464 (RR, GG and BB are hex value) only in color mode.

Dimming works using slider and Dimmer command but only when in color mode, in rgb_cycle there are no brightness controls.

Long press on device's power button initiates Tasmota's Wi-Fi config

Tuya Protocols

The MCU communicates with the Wi-Fi module through the serial port with a Tuya specified protocol. Those are classified into basic and functional protocols.

Basic protocols

They are common protocols integrated in Tasmota's TuyaMCU module. They stay the same for each product and are mandatory for Tuya module to work correctly.

Functional protocols

Functional protocols are used for delivering and reporting data of functions. These protocols differ between devices and manufacturers and might require configuration in Tasmota using TuyaMCU command or with TuyaSend<x> command.

Anatomy of Functional Protocols

Name	Description
Frame Header Version	Fixed value of 0x55aa
Command Word	`0x06` - send commands `0x07` - report status
Data Length	defines expected length of data
dpID	numbered ID of a function (DP = Data Point or Define Product)
Data Type	see Data Type table below
Function Length	length of command
Function Command	formatted according to Data Type
Verification Method	checksum = remainder of the byte sum starting from Frame Header to 256

Data Type

Hex	Tasmota Command	Decription	Max length
0x01	TuyaSend1	boolean data `0/1`	1 byte
0x02	TuyaSend2	value data. If a value contains less than 4 bytes, 0 is supplemented before	4 bytes
0x00	TuyaSend3	string data	unknown
0x04	TuyaSend4	enum data `0/1/2/3/4/5`	1 byte
0x05	###	fault data, report only	8 bytes

Let's dissect and explain the MCU protocol using serial command 55aa0006000501010001010e:

Frame Header Version	Command Word	Data Length	dpID	Data Type	Function Length	Function Command	Verification Method
55aa00	06	0005	01	01	0001	01	0e

This is the command which powers on the device sending Function Command = 1 to dpID 1 (Switch):

Frame Header Version = 0x55aa00 which is a fixed value and always the same
Command Word = 0x06 because we're sending a command
Data Type = 0x01 since the command sent is a 1 byte boolean
Function Length = 0x001 instruct 1 character only for function command length
Function Command = 0x01 in hex which equals 1 in int
Verification Method = 0e is calculated

Protocol flow

On device boot, TuyaMCU executes the required basic protocols and reads the functional protocol data received, which are used to update status of components mapped in TuyaMCU (Relays, dimmer, power monitoring data).

After receiving a command from Tasmota (Command Word 0x06), the MCU performs corresponding logical control. When the dpID status is changed, the MCU reports the data (Command Word 0x07) to TuyaMCU component.

dpId Function Tables

This information is just for orientation. Functions are assigned by the manufacturer and can be on different dpId's

DP ID: dpId.
Function Point：Used to describe the product function.
Identifier: Function codename. Can only be letters, numbers and underscores
Data type：
- Issue and report: command data can be sent and status data can be reported back to the Wi-Fi module
- Report only: supports only status reporting, no control options
Function Type (Referred as Data Type in TuyaMCU article):
- Boolean (bool): non-true or false binary variable, such as: switch function, on / off
- Value (value): suitable for linear adjustment of the type of data, such as: temperature regulation, temperature range 20-40 ℃
- Enum (enum): custom finite set value, such as: working levels, low / mid / high
- Fault (fault): dedicated to reporting and statistical failure of the function points. Support multi-fault, the data is reported only
- Integer（integer）: transmitted as integer
- Transparent (raw): data in binary

Switches or Plugs/Power Strips

DP ID	Identifier	Data type	Function type	Properties
1	switch_1	Control and report	Boolean
2	switch_2	Control and report	Boolean
3	switch_3	Control and report	Boolean
4	switch_4	Control and report	Boolean
5	switch_5	Control and report	Boolean
9	countdown_1	Control and report	Integer	undefined0-86400, undefined1, Scale0, Unit:s
10	countdown_2	Control and report	Integer	undefined0-86400, undefined1, Scale0, Unit:s
11	countdown_3	Control and report	Integer	undefined0-86400, undefined1, Scale0, Unit:s
12	countdown_4	Control and report	Integer	undefined0-86400, undefined1, Scale0, Unit:s
13	countdown_5	Control and report	Integer	undefined0-86400, undefined1, Scale0, Unit:s

Aromatherapy Machine (Oil Diffuser)

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Switch	Power	Issue and report	Boolean
6	Amount of fog	fog	Issue and report	Enum	Enumerated values:small, large
11	Light	Light	Issue and report	Boolean
12	Fault alarm	fault	Only report	Fault	Barrier values:1
13	Countdown	countdown	Issue and report	Enum	Enumerated values: 0, 1, 2, 3
14	Countdown remaining time	countdown_left	Only report	Integer	Values range: 0-360, Pitch1, Scale0, Unit:min
101	Light mode	work_mode	Issue and report	Enum	Enumerated values: white, colour, scene, scene1, scene2, scene3, scene4
102	Color value	colour_data	Issue and report	Char type	*see below
103	Light mode	lightmode	Issue and report	Enum	Enumerated values: 1, 2, 3
104	Brightness setting	setlight	Issue and report	Integer	Values range: 0-255, Pitch1, Scale0, Unit:%

colour_data format of the lights is a string of 14 characters, for example, 00112233334455, where 00 indicates R, 11 indicates G, 22 indicates B, 3333 indicates the hue, 44 indicates the saturation, and 55 indicates the value. The initial value is saved by default. If you do not want to adjust the light, set the data to the maximum value 100% (0x64). The last four characters have fixed values.

Curtain Motor

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Percentage	percent_state	Only report	Integer	Values range:0-100, Pitch1, Scale0, Unit:%
2	Motor Direction	control_back	Issue and report	Boolean
3	Auto Power	auto_power	Issue and report	Boolean
4	Left time	countdown	Issue and report	Enum	Enumerated values:cancel, 1, 2, 3, 4
5	Total Time	time_total	Only report	Integer	Values range:0-120000, Pitch1, Scale0, Unit:m

Complete document on protocols

Power Monitoring Plug

DP ID	Function points	Identifier	Data type	Function type	Properties
1	switch_1	switch_1	Control and report	Boolean
9	countdown_1	countdown_1	Control and report	Integer	undefined0-86400, undefined1, Scale0, Unit:s
17	statistics Function	add_ele	Control and report	Integer	undefined0-50000, undefined100, Scale3, Unit:
18	current	cur_current	Data report	Integer	undefined0-30000, undefined1, Scale0, Unit:mA
19	power	cur_power	Data report	Integer	undefined0-50000, undefined1, Scale1, Unit:W
20	voltage	cur_voltage	Data report	Integer	undefined0-5000, undefined1, Scale1, Unit:V
21	test flag	test_bit	Data report	Integer	undefined0-5, undefined1, Scale0, Unit:
22	voltage coefficient	voltage_coe	Data report	Integer	undefined0-1000000, undefined1, Scale0, Unit:
23	current coefficient	electric_coe	Data report	Integer	undefined0-1000000, undefined1, Scale0, Unit:
24	power coefficient	power_coe	Data report	Integer	undefined0-1000000, undefined1, Scale0, Unit:
25	statistics coefficient	electricity_coe	Data report	Integer	undefined0-1000000, undefined1, Scale0, Unit:
26	warning	fault	Data report	Fault	Barrier values:ov_cr

Dehumidifier

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Switch	Switch	Issue and report	Boolean
2	PM2.5	PM25	Only report	Integer	Values range:0-999, Pitch1, Scale0, Unit:
3	Work mode	Mode	Issue and report	Enum	Enumerated values:Manual, Auto, Sleep
4	Wind speed	Speed	Issue and report	Enum	Enumerated values:speed1, speed2, speed3, speed4, speed5
5	Filter usage	Filter	Only report	Integer	Values range:0-100, Pitch1, Scale0, Unit:%
6	Fresh	Anion	Issue and report	Boolean
7	Child lock	Lock	Issue and report	Boolean
9	UV light	UV	Issue and report	Boolean
11	Filter reset	FilterReset	Issue and report	Boolean
12	indoor temp	Temp	Only report	Integer	Values range:-20-50, Pitch1, Scale0, Unit:℃
13	Indoor humidity	Humidity	Only report	Integer	Values range:0-100, Pitch1, Scale0, Unit:%

Lighting

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Switch	led_switch	Control and report	Boolean
2	Mode	work_mode	Control and report	Enum	Enumerated values:white, colour, scene, scene_1, scene_2, scene_3, scene_4
3	Bright	bright_value	Control and report	Integer	undefined25-255, undefined1, Scale0, Unit:
5	Colour mode	colour_data	Control and report	Char type
6	Scene	scene_data	Control and report	Char type
7	Scene1	flash_scene_1	Control and report	Char type
8	Scene2	flash_scene_2	Control and report	Char type
9	Scene3	flash_scene_3	Control and report	Char type
10	Scene4	flash_scene_4	Control and report	Char type

Air purifier

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Switch	Switch	Issue and report	Boolean
2	PM2.5	PM25	Only report	Integer	Values range:0-999, Pitch1, Scale0, Unit:
3	Work mode	Mode	Issue and report	Enum	Enumerated values:Manual, Auto, Sleep
4	Wind speed	Speed	Issue and report	Enum	Enumerated values:speed1, speed2, speed3, speed4, speed5
5	Filter usage	Filter	Only report	Integer	Values range:0-100, Pitch1, Scale0, Unit:%
6	Fresh	Anion	Issue and report	Boolean
7	Child lock	Lock	Issue and report	Boolean
9	UV light	UV	Issue and report	Boolean
11	Filter reset	FilterReset	Issue and report	Boolean
12	indoor temp	Temp	Only report	Integer	Values range:-20-50, Pitch1, Scale0, Unit:℃
13	Indoor humidity	Humidity	Only report	Integer	Values range:0-100, Pitch1, Scale0, Unit:%

Heater

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Switch	Power	Issue and report	Boolean
2	Target temperature	TempSet	Issue and report	Integer	Values range:0-37, Pitch1, Scale0, Unit:℃
3	Current Temperature	TempCurrent	Only report	Integer	Values range:-9-99, Pitch1, Scale0, Unit:℃
4	Mode	Mode	Issue and report	Enum	Enumerated values:m, p
5	Fault alarm	Fault	Only report	Fault	Barrier values:1, 2, 3
6	Gear position	gear	Issue and report	Enum	Enumerated values:low, mid, high, off
7	Conservation	eco_mode	Issue and report	Boolean

Smart fan

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Switch	switch	Issue and report	Boolean
2	Wind Speed Level	fan_speed	Issue and report	Enum	Enumerated values:1, 2, 3, 4
3	Left-and-Right Swing	fan_horizontal	Issue and report	Enum	Enumerated values:on, off
4	Up-and-Down Swing	fan_vertical	Issue and report	Enum	Enumerated values:on, off
5	Fault Alarm	fault	Only report	Fault	Barrier values:1, 2
6	Anion	anion	Issue and report	Boolean
7	Humidify	humidifier	Issue and report	Boolean
8	Oxygen	oxygan	Issue and report	Boolean
9	Child Lock	lock	Issue and report	Boolean
10	Cool	fan_cool	Issue and report	Boolean
11	Set Temperate	temp	Issue and report	Integer	Values range:0-50, Pitch1, Scale0, Unit:℃
12	Current Temperature	temp_current	Only report	Integer	Values range:0-50, Pitch1, Scale0, Unit:℃

Kettle

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Working switch	start	Issue and report	Boolean
2	Heat to target temperature shortcut (°C)	temp_setting_quick_c	Issue and report	Enum	Enumerated values:50, 65, 85, 90, 100
3	Heat to target temperature shortcut (°F)	temp_setting_quick_f	Issue and report	Enum	Enumerated values:122, 149, 185, 194, 212
4	Cool to the target temperature shortcut after boiling (°C)	temp_boiling_quick_c	Issue and report	Enum	Enumerated values:50, 65, 85, 90, 100
5	Cool to the target temperature shortcut after boiling (°F)	temp_boiling_quick_f	Issue and report	Enum	Enumerated values:122, 149, 185, 194, 212
6	Temperature scale switching	temp_unit_convert	Issue and report	Enum	Enumerated values:c, f
7	Insulation switch	switch_keep_warm	Issue and report	Boolean
8	Holding time setting	keep_warm_setting	Issue and report	Integer	Values range:0-360, Pitch1, Scale0, Unit:min
9	Mode	work_type	Issue and report	Enum	Enumerated values: setting_quick, boiling_quick, temp_setting, temp_

BecaThermostat(WIP)

DP ID	Function points	Identifier	Data type	Function type	Properties
1	Switch	Power	Issue and report	Boolean
2	Target temperature	TempSet	Issue and report	Integer	Values range:0-37, Pitch1, Scale0, Unit:℃
3	Current Temperature	TempCurrent	Only report	Integer	Values range:-9-99, Pitch1, Scale0, Unit:℃
4	Mode	Mode	Issue and report	Enum	Enumerated values:m, p (wip)
102	Floor Temperature	FloorCurrent	Issue and report	Integer	Values range:0-37, Pitch1, Scale0, Unit:℃

Inkbird ITC-308-Wifi Temperature controller with individual plug in sockets for heating/cooling

DP ID	Function points	Identifier	Data type	Function type	Properties
101	Temperature unit	Cf	Issue and report	Integer	0=C, 1=F
102	Calibration	Ca	Issue and report	Integer	Unit is 0.1C
104	Temperature sensor		Issue and report	Integer	Unit is 0.1C
106	Temperature set point	Ts	Issue and report	Integer	Unit is 0.1C
108	Compressor delay time	Pt	Issue and report	Integer	Unit is minutes
109	Alarm high temperature	Ah	Issue and report	Integer	Unit is 0.1C
110	Alarm low temperature	Al	Issue and report	Integer	Unit is 0.1C, For negative values use -(0xFFFFFFFF - value)
115	Relay status		Only report	Integer	01=cool, 02=off, 03=heating
116	Temperature sensor		Issue and report	Integer	Unit is 0.1F
117	Heating differential value	Hd	Issue and report	Integer	Unit is 0.1C
118	Cooling differential value	Cd	Issue and report	Integer	Unit is 0.1C

The unit will constantly be sending the temperature sensor value in celcius and fahrenheit: 104 and 116. To trigger the unit to send all settings, send any value to a non-used register, e.g. TuyaSend1 2,1

Example:

Tasmota command	Result
TuyaSend1 2,1	Trigger the unit to reveal all settings
TuyaSend2 106,250	Change set-point to 25.0C
TuyaSend2 101,1	Change units to Fahrenheit

Files

TuyaMCU.md

Latest commit

History

TuyaMCU.md

File metadata and controls

TuyaMCU Command

dpId

fnId

TuyaSend Command

TuyaSend1

TuyaSend2

TuyaSend3

TuyaSend4

TuyaReceived

Example

Use in Rules

Device Configurations

Dimmers

Dimming dpId

Dimming Range

Power Metering

Switches

Number of Relays

Power Metering

Curtain Motors

Debugging

dpId Configuration

Things That Did Not Work

Aromatherapy Diffuser

Functions

Configuration

What you get

Tuya Protocols

Basic protocols

Functional protocols

Anatomy of Functional Protocols

Data Type

Protocol flow

dpId Function Tables

Switches or Plugs/Power Strips

Aromatherapy Machine (Oil Diffuser)

Curtain Motor

Power Monitoring Plug

Dehumidifier

Lighting

Air purifier

Heater

Smart fan

Kettle

BecaThermostat(WIP)

Inkbird ITC-308-Wifi Temperature controller with individual plug in sockets for heating/cooling

Further Reading

`TuyaSend1`

`TuyaSend2`

`TuyaSend3`

`TuyaSend4`