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Modbus RTU

HA-DALI Professional Dimming Gateway

Supports DALI DT6 dimming and DT8 dimming & color temperature protocols as standard, compatible with DIM, CW, RGB, RGBW and RGBWA drivers. Supports 64 drivers, 16 group addresses and 16 scenes.

Industrial Protocol
Data Acquisition
Standalone Backend
HA Support

Why Choose the DALI Professional Dimming Gateway?

⚙

Full DALI DT6/DT8 Compatibility · Flexible Control

Supports DALI DT6 (dimming) and DT8 (dimming & color temperature) protocols, compatible with DIM, CW, RGB, RGBW, RGBWA and other driver types. Fade time, brightness, color temperature and RGB channels can be controlled independently.

🔗

Standard Modbus RTU · Seamless PLC Integration

RS485 control serial port supporting function codes 03/06/10. Independent control of 16 groups / 64 drivers, online status and fault monitoring, 16 scene calls — easy integration with PLCs and SCADA software.

🔋

Built-in DALI Bus Power Supply · Simplified Deployment

Built-in DALI bus power supply with 16V±5% no-load output and 250mA maximum output current. Powers the DALI bus directly without an external DALI power supply, reducing system cost and complexity.

🏠

Optional Native HA Integration · Smart Lighting Automation

Connects to Home Assistant via Modbus RTU to create DALI light entities for brightness/color temperature adjustment, scene switching, scheduled control, sensor linkage and whole-home smart lighting.

🔌

Dual Serial Port Design · Separate Debug and Control

Equipped with a debug serial port and a control serial port: the debug port connects to PC host software for DALI configuration, while the control port connects to the central control system — independent of each other and easy to maintain.

📊 Specifications

Parameter	Specification
Input Voltage	AC 110~230V ±10%, 50/60Hz
DALI Bus Power Supply	No-load 16V±5% / Max 250mA / Guaranteed 200mA
Supported Protocols	DALI DT6 (dimming) / DT8 (dimming & color temperature)
Groups	16 groups (8 registers per group)
Drivers	Supports 64 drivers (8 registers per driver); CW/DIM/RGB/RGBW/RGBWA driver types supported
Scenes	16 scenes
Communication Interface	RS485 ×2 (debug serial / control serial)
DALI Interface	1 pair: 2× DA+ and 2× DA-, 4 terminals in total
Communication Protocol	Modbus RTU (9600,N,8,1) standard; optional HA version via 2.4G WiFi
Device Address	1–63 (set via DIP switch)
Indicator LEDs	LED1: power indicator; LED2: DALI signal indicator
Test Button	ON/OFF button (all drivers) Single press: max power level; press again: off
Operating Temp./Humidity	-5°C~45°C, humidity ≤90%
Dimensions	114 × 98 × 72 mm
Mounting	35mm standard DIN rail
Protection Rating	IP20

⚡ Optional HA Integration · Setup Steps

Power & Network

Power on the device and connect to its hotspot starting with “HA” from your phone/PC.

Network Setup

Open WiFi on your phone or PC and connect to the “HA-xxxx” hotspot (password 12345678). The device redirects to the setup portal automatically (if not, visit 192.168.4.1 in a browser), then join the device to the 2.4G network where the HA host resides.

Add the HA-ESPHome Integration

In Home Assistant go to Settings → Devices & Services → ESP integration; the device appears automatically (native platinum integration) — click Configure to add it. *The ESP integration only exposes 16 scenes, not all entities; MQTT setup is also required.

HA-MQTT Configuration

After adding the device in ESPHome, After adding the device in ESPHome, find the device IP under “Diagnostics”. Open IP:88 to configure the device’s MQTT. Once MQTT is configured on the device, open Home Assistant → Settings → Devices & Services → add the MQTT integration; after configuring MQTT, the device appears automatically. MQTT provides complete entities for 16 groups, 64 lights and 16 scenes.

Create Scene Automations

Add light cards on the HA dashboard and create automations such as scene switching, scheduled dimming and sensor linkage.

Device Reset

The device has a retry mechanism: if it cannot reconnect to its configured network for about 2–3 minutes, it resets automatically. You can also reset it via the RESET button in the HA backend.

🔌 Installation · Wiring

Interface	Description
DALI Interface	DA1(DA+) / DA2(DA-), 4 terminals in total
Power Input	L / N (AC 110~230V)
Control Serial Port	RS485 A/B（Modbus RTU）
Debug Serial Port	RS485 A/B (DALI host software)

⚠️ Wiring Tips: Use RVV 2×0.75 or better for DALI signal lines; network cable is not a substitute. Wire DALI signals in a daisy-chain (series) topology and avoid star/multi-node wiring. DA1 corresponds to DA+, DA2 to DA-.

📡 Modbus RTU Protocol Details

Standard Modbus RTU · Function Codes 03/06/10

Communication Format

✅ 9600, N, 8, 1 (fixed, cannot be changed)
✅ Frame interval ≥ 150ms
✅ Slave address range: 01H–3FH (set via DIP switch)
✅ Standard Modbus RTU protocol
✅ Group address control, short address control, online/fault status queries
✅ Group address registers: 0001H–0080H
✅ Short address registers: 0081H–0280H
✅ Online status: 0281H–0284H
✅ Fault status: 0285H–0288H
✅ Scene call: 028AH (function code 06 only)
✅ Up to 125 registers read at once
✅ 8 registers per group/short address (fade, brightness, color temperature, R, G, B, W, A)
✅ Function codes 03H, 06H, 10H supported

Note: A DALI device takes about 30s to power on; short address = driver. When writing multiple registers (RGB types) with 10H, write fade + brightness + color temperature (0xFF) + R + G + B + W + A — 8 registers consecutively.

1. Group Address Registers (0001H–0080H)

16 groups in total, 8 registers each, controlling fade time, brightness, color temperature, R, G, B, W and A respectively.

Group	Start	+0 Fade	+1 Brightness	+2 CCT	+3 R	+4 G	+5 B	+6 W	+7 A
1	0001H	0001H	0002H	0003H	0004H	0005H	0006H	0007H	0008H
2	0009H	0009H	000AH	000BH	000CH	000DH	000EH	000FH	0010H
3	0011H	0011H	0012H	0013H	0014H	0015H	0016H	0017H	0018H
4	0019H	0019H	001AH	001BH	001CH	001DH	001EH	001FH	0020H
5	0021H	0021H	0022H	0023H	0024H	0025H	0026H	0027H	0028H
6	0029H	0029H	002AH	002BH	002CH	002DH	002EH	002FH	0030H
7	0031H	0031H	0032H	0033H	0034H	0035H	0036H	0037H	0038H
8	0039H	0039H	003AH	003BH	003CH	003DH	003EH	003FH	0040H
9	0041H	0041H	0042H	0043H	0044H	0045H	0046H	0047H	0048H
10	0049H	0049H	004AH	004BH	004CH	004DH	004EH	004FH	0050H
11	0051H	0051H	0052H	0053H	0054H	0055H	0056H	0057H	0058H
12	0059H	0059H	005AH	005BH	005CH	005DH	005EH	005FH	0060H
13	0061H	0061H	0062H	0063H	0064H	0065H	0066H	0067H	0068H
14	0069H	0069H	006AH	006BH	006CH	006DH	006EH	006FH	0070H
15	0071H	0071H	0072H	0073H	0074H	0075H	0076H	0077H	0078H
16	0079H	0079H	007AH	007BH	007CH	007DH	007EH	007FH	0080H

Register	Parameter	Range	Description
Fade Time	Dimming fade	00H~0FH	00=immediate, 01=0.7s，02=1s，03=1.4s，04=2s，05=2.8s，06=4s，07=5.7s，08=8s，09=11.3s，0A=16s，0B=22.6s，0C=32s，0D=45.3s，0E=64s，0F=90.5s
Brightness	Dimming value	00H~FEH (0-254)	0=off, 254=max brightness
Color Temperature	CCT value	19H~41H (25-65)	Corresponds to 2500K–6500K
R/G/B/W/A	Per channel	00H~FEH	RGBWA channel values

2. Short Address Registers (0081H–0280H) — Complete List of 64 Drivers

Each driver occupies 8 consecutive registers, same layout as group addresses.

Driver	Start	+0 Fade	+1 Brightness	+2 CCT	+3 R	+4 G	+5 B	+6 W	+7 A
1	0081H	0081H	0082H	0083H	0084H	0085H	0086H	0087H	0088H
2	0089H	0089H	008AH	008BH	008CH	008DH	008EH	008FH	0090H
3	0091H	0091H	0092H	0093H	0094H	0095H	0096H	0097H	0098H
4	0099H	0099H	009AH	009BH	009CH	009DH	009EH	009FH	00A0H
5	00A1H	00A1H	00A2H	00A3H	00A4H	00A5H	00A6H	00A7H	00A8H
6	00A9H	00A9H	00AAH	00ABH	00ACH	00ADH	00AEH	00AFH	00B0H
7	00B1H	00B1H	00B2H	00B3H	00B4H	00B5H	00B6H	00B7H	00B8H
8	00B9H	00B9H	00BAH	00BBH	00BCH	00BDH	00BEH	00BFH	00C0H
9	00C1H	00C1H	00C2H	00C3H	00C4H	00C5H	00C6H	00C7H	00C8H
10	00C9H	00C9H	00CAH	00CBH	00CCH	00CDH	00CEH	00CFH	00D0H
11	00D1H	00D1H	00D2H	00D3H	00D4H	00D5H	00D6H	00D7H	00D8H
12	00D9H	00D9H	00DAH	00DBH	00DCH	00DDH	00DEH	00DFH	00E0H
13	00E1H	00E1H	00E2H	00E3H	00E4H	00E5H	00E6H	00E7H	00E8H
14	00E9H	00E9H	00EAH	00EBH	00ECH	00EDH	00EEH	00EFH	00F0H
15	00F1H	00F1H	00F2H	00F3H	00F4H	00F5H	00F6H	00F7H	00F8H
16	00F9H	00F9H	00FAH	00FBH	00FCH	00FDH	00FEH	00FFH	0100H
17	0101H	0101H	0102H	0103H	0104H	0105H	0106H	0107H	0108H
18	0109H	0109H	010AH	010BH	010CH	010DH	010EH	010FH	0110H
19	0111H	0111H	0112H	0113H	0114H	0115H	0116H	0117H	0118H
20	0119H	0119H	011AH	011BH	011CH	011DH	011EH	011FH	0120H
21	0121H	0121H	0122H	0123H	0124H	0125H	0126H	0127H	0128H
22	0129H	0129H	012AH	012BH	012CH	012DH	012EH	012FH	0130H
23	0131H	0131H	0132H	0133H	0134H	0135H	0136H	0137H	0138H
24	0139H	0139H	013AH	013BH	013CH	013DH	013EH	013FH	0140H
25	0141H	0141H	0142H	0143H	0144H	0145H	0146H	0147H	0148H
26	0149H	0149H	014AH	014BH	014CH	014DH	014EH	014FH	0150H
27	0151H	0151H	0152H	0153H	0154H	0155H	0156H	0157H	0158H
28	0159H	0159H	015AH	015BH	015CH	015DH	015EH	015FH	0160H
29	0161H	0161H	0162H	0163H	0164H	0165H	0166H	0167H	0168H
30	0169H	0169H	016AH	016BH	016CH	016DH	016EH	016FH	0170H
31	0171H	0171H	0172H	0173H	0174H	0175H	0176H	0177H	0178H
32	0179H	0179H	017AH	017BH	017CH	017DH	017EH	017FH	0180H
33	0181H	0181H	0182H	0183H	0184H	0185H	0186H	0187H	0188H
34	0189H	0189H	018AH	018BH	018CH	018DH	018EH	018FH	0190H
35	0191H	0191H	0192H	0193H	0194H	0195H	0196H	0197H	0198H
36	0199H	0199H	019AH	019BH	019CH	019DH	019EH	019FH	01A0H
37	01A1H	01A1H	01A2H	01A3H	01A4H	01A5H	01A6H	01A7H	01A8H
38	01A9H	01A9H	01AAH	01ABH	01ACH	01ADH	01AEH	01AFH	01B0H
39	01B1H	01B1H	01B2H	01B3H	01B4H	01B5H	01B6H	01B7H	01B8H
40	01B9H	01B9H	01BAH	01BBH	01BCH	01BDH	01BEH	01BFH	01C0H
41	01C1H	01C1H	01C2H	01C3H	01C4H	01C5H	01C6H	01C7H	01C8H
42	01C9H	01C9H	01CAH	01CBH	01CCH	01CDH	01CEH	01CFH	01D0H
43	01D1H	01D1H	01D2H	01D3H	01D4H	01D5H	01D6H	01D7H	01D8H
44	01D9H	01D9H	01DAH	01DBH	01DCH	01DDH	01DEH	01DFH	01E0H
45	01E1H	01E1H	01E2H	01E3H	01E4H	01E5H	01E6H	01E7H	01E8H
46	01E9H	01E9H	01EAH	01EBH	01ECH	01EDH	01EEH	01EFH	01F0H
47	01F1H	01F1H	01F2H	01F3H	01F4H	01F5H	01F6H	01F7H	01F8H
48	01F9H	01F9H	01FAH	01FBH	01FCH	01FDH	01FEH	01FFH	0200H
49	0201H	0201H	0202H	0203H	0204H	0205H	0206H	0207H	0208H
50	0209H	0209H	020AH	020BH	020CH	020DH	020EH	020FH	0210H
51	0211H	0211H	0212H	0213H	0214H	0215H	0216H	0217H	0218H
52	0219H	0219H	021AH	021BH	021CH	021DH	021EH	021FH	0220H
53	0221H	0221H	0222H	0223H	0224H	0225H	0226H	0227H	0228H
54	0229H	0229H	022AH	022BH	022CH	022DH	022EH	022FH	0230H
55	0231H	0231H	0232H	0233H	0234H	0235H	0236H	0237H	0238H
56	0239H	0239H	023AH	023BH	023CH	023DH	023EH	023FH	0240H
57	0241H	0241H	0242H	0243H	0244H	0245H	0246H	0247H	0248H
58	0249H	0249H	024AH	024BH	024CH	024DH	024EH	024FH	0250H
59	0251H	0251H	0252H	0253H	0254H	0255H	0256H	0257H	0258H
60	0259H	0259H	025AH	025BH	025CH	025DH	025EH	025FH	0260H
61	0261H	0261H	0262H	0263H	0264H	0265H	0266H	0267H	0268H
62	0269H	0269H	026AH	026BH	026CH	026DH	026EH	026FH	0270H
63	0271H	0271H	0272H	0273H	0274H	0275H	0276H	0277H	0278H
64	0279H	0279H	027AH	027BH	027CH	027DH	027EH	027FH	0280H

3. Online Status Registers (0281H–0284H)

4 registers in total, 16 bits each, mapping 64 drivers. Bit=1 online, Bit=0 offline.

Register	Bit15	Bit14	Bit13	Bit12	Bit11	Bit10	Bit9	Bit8	Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0
0281H	Driver 16	Driver 15	Driver 14	Driver 13	Driver 12	Driver 11	Driver 10	Driver 9	Driver 8	Driver 7	Driver 6	Driver 5	Driver 4	Driver 3	Driver 2	Driver 1
0282H	Driver 32	Driver 31	Driver 30	Driver 29	Driver 28	Driver 27	Driver 26	Driver 25	Driver 24	Driver 23	Driver 22	Driver 21	Driver 20	Driver 19	Driver 18	Driver 17
0283H	Driver 48	Driver 47	Driver 46	Driver 45	Driver 44	Driver 43	Driver 42	Driver 41	Driver 40	Driver 39	Driver 38	Driver 37	Driver 36	Driver 35	Driver 34	Driver 33
0284H	Driver 64	Driver 63	Driver 62	Driver 61	Driver 60	Driver 59	Driver 58	Driver 57	Driver 56	Driver 55	Driver 54	Driver 53	Driver 52	Driver 51	Driver 50	Driver 49

4. Fault Status Registers (0285H–0288H)

4 registers in total, 16 bits each, mapping 64 drivers. Bit=1 fault, Bit=0 normal.

Register	Bit15	Bit14	Bit13	Bit12	Bit11	Bit10	Bit9	Bit8	Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0
0285H	Driver 16	Driver 15	Driver 14	Driver 13	Driver 12	Driver 11	Driver 10	Driver 9	Driver 8	Driver 7	Driver 6	Driver 5	Driver 4	Driver 3	Driver 2	Driver 1
0286H	Driver 32	Driver 31	Driver 30	Driver 29	Driver 28	Driver 27	Driver 26	Driver 25	Driver 24	Driver 23	Driver 22	Driver 21	Driver 20	Driver 19	Driver 18	Driver 17
0287H	Driver 48	Driver 47	Driver 46	Driver 45	Driver 44	Driver 43	Driver 42	Driver 41	Driver 40	Driver 39	Driver 38	Driver 37	Driver 36	Driver 35	Driver 34	Driver 33
0288H	Driver 64	Driver 63	Driver 62	Driver 61	Driver 60	Driver 59	Driver 58	Driver 57	Driver 56	Driver 55	Driver 54	Driver 53	Driver 52	Driver 51	Driver 50	Driver 49

5. Scene Call Register (028AH) · Function Code 06 Only

High byte = fade time (00–0F or FF), low byte = scene number (01–10).

Scene	Register Value (high/low byte)	Fade Time	Command Example (function code 06)
1	00 01	Immediate	`01 06 02 8A 00 01 68 58`
2	01 02	0.7s	`01 06 02 8A 01 02 29 C9`
3	02 03	1s	`01 06 02 8A 02 03 E8 F9`
4	03 04	1.4s	`01 06 02 8A 03 04 A8 AB`
5	04 05	2s	`01 06 02 8A 04 05 6B 5B`
6	05 06	2.8s	`01 06 02 8A 05 06 2A 0C`
7	06 07	4s	`01 06 02 8A 06 07 EB FA`
8	07 08	5.7s	`01 06 02 8A 07 08 AA 6E`
9	08 09	8s	`01 06 02 8A 08 09 6E 5E`
10	09 0A	11.3s	`01 06 02 8A 09 0A 2F CF`
11	0A 0B	16s	`01 06 02 8A 0A 0B EE FF`
12	0B 0C	22.6s	`01 06 02 8A 0B 0C AE AD`
13	0C 0D	32s	`01 06 02 8A 0C 0D 6D 5D`
14	0D 0E	45.3s	`01 06 02 8A 0D 0E 2C 0C`
15	0E 0F	64s	`01 06 02 8A 0E 0F ED FC`
16	0F 10	90.5s	`01 06 02 8A 0F 10 AD A4`

Note: If the high byte is FF, no fade time is sent and the scene is triggered directly.

// Example: call scene 1 (immediate)
Send: 01 06 02 8A 00 01 68 58
// Example: read online status of drivers 1–64
Send: 01 03 02 81 00 04 15 99

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