Real-time local control for Proscenic Robot Vacuums. No cloud. No latency.
Reverse engineered a Proscenic 850T robot vacuum to bypass cloud dependency and fix a broken remote.
The Proscenic 850T uses Tuya OEM as its IoT backend. The official app's virtual remote has a structural flaw: every directional command is processed synchronously, meaning you have to wait for the robot to finish each movement before issuing the next one. Real-time steering is impossible.
This project allows you to control your robot vacuum entirely over LAN, bypassing the Proscenic cloud — no account, no internet connection required, no data sent to third-party servers.
The full reverse engineering story — Frida, LDPlayer, localKey extraction, DP mapping — is documented in the companion article on Medium:
- Real-time directional remote — keyboard arrows + mouse/touch,
mousedownsends command,mouseupsends stop. Zero latency. - Smart START/STOP button — sends
DP 25 = smartwhen idle,DP 33 = falsewhen working - Cleaning mode selection — Auto, Edge, Spot, Mop (auto-locked when water tank not detected)
- Suction power control — ECO / Normal / Strong with active level highlight
- Water flow control — Low / Medium / High (visible only when mop tank is installed)
- Accessory wear bars — Filter, Side brush, Main brush, Sensor with one-click reset
- Fault banner — animated red banner decoding DP 11 bitmap errors in plain text
- Device info balloon — IP, Device ID, Product Key, Serial Number on hover
- Zero cloud dependency — communicates directly over LAN, no internet required
- Auto-polling — status update every 5 seconds
- Python 3.8+
- pip packages:
flask,tinytuya,python-dotenv - Your robot on the same LAN as the server
devId,localKeyand local IP of your device (see Configuration)
pip install flask tinytuya python-dotenv# Clone the repo
git clone https://github.com/piuppi/localScenic.git
cd localScenic
# Install dependencies
pip install flask tinytuya python-dotenv
# Edit configuration
nano .env # set DEVICE_ID, LOCAL_KEY, IP
# Run
python app.pyOpen your browser at http://localhost:5000
To make it accessible from other devices on your LAN, the server already binds to 0.0.0.0:5000.
Create a .env file in the project root:
device_id="your_device_id_here"
local_key="your_local_key_here"
device_ip="10.10.x.x"
⚠️ Important: Use a static IP for your robot in your router's DHCP settings. TheAUTOdiscovery mode is unreliable and may cause connection timeouts.
The devId and localKey are device-specific keys needed to communicate locally with your robot. They are not available through the official Proscenic app or Tuya developer portal (Proscenic uses a separate OEM cloud).
One way to retrieve them is by extracting them from the app at runtime using Frida on a rooted Android emulator, unless we disconnect the robot from the Proscenic app and re-pair it via Smart Life (Tuya), which I chose not to do..
📄 The full extraction guide is covered in the companion Medium article.
Complete DP mapping for the Proscenic 850T, obtained by reverse engineering the official app.
| DP | Name | Values | Access |
|---|---|---|---|
| 25 | Cleaning mode | smart · wallfollow · sprial · mop · chargego |
rw |
| 26 | Direction (remote) | forward · backward · turnleft · turnright · stop |
rw |
| 27 | Suction power | ECO · normal · strong |
rw |
| 33 | Start / Stop | true = working · false = stop |
rw |
| 50 | Find robot (beep) | true |
rw |
| 51 | Lights | true · false |
rw |
| 52 | Reboot device | true |
rw |
| 53 | Fan on/off | true · false |
rw |
| 60 | Water flow | small · medium · Big |
rw |
| DP | Name | Values | Access |
|---|---|---|---|
| 11 | Fault bitmap | 0=ok · 16=tank missing · 32=floor sensor · ... |
ro |
| 38 | Current state | 0=standby · 1=cleaning · 2=mopping · 3=edge · 4=returning · 5=charging · 6=spot · 7=paused · 9=remote |
ro |
| 39 | Battery | 0–100 % | ro |
| 40 | Cleaning record | string (timestamp + area + id) | ro |
| 41 | Cleaned area | value ÷ 10 = m² | ro |
| 42 | Cleaning time | minutes | ro |
| 44 | Sensor life | 0–30 h | ro |
| 45 | Filter life | 0–150 h | ro |
| 47 | Side brush life | 0–200 h | ro |
| 48 | Main brush life | 0–300 h | ro |
| 49 | Tank type | sweep = dust tank · mop = water tank |
ro |
| 58 | Serial number | string | ro |
| DP | Name | Value |
|---|---|---|
| 54 | Reset sensor | true |
| 55 | Reset filter | true |
| 56 | Reset side brush | true |
| 57 | Reset main brush | true |
DP 11 bitmap: value
16= bit 4 = water tank not installed. Value32= bit 5 = floor sensor occluded.
Note: DP 1 (power on/off) and DP 105 (scheduled cleaning) are present in the device model but do not appear to be functional on the 850T hardware.
localScenic/
├── app.py # Flask backend
├── templates/
│ └── index.html # Frontend (single file, no JS framework)
└── README.md
This project is an independent, community-driven effort and is not affiliated with, endorsed by, or connected to Proscenic or Tuya in any way.
All reverse engineering was performed on hardware owned by the author, on a private local network, for the purpose of interoperability.
No Proscenic or Tuya servers were accessed without authorisation. No credentials belonging to other users were extracted or used.
Use this software at your own risk. The author is not responsible for any damage to your device, your network, or any violation of your local laws or terms of service.
PRs are welcome! In particular:
- Screenshots of the webapp in action
- Testing on other Proscenic models (T10, T20, M8S, etc.)
- DP mapping corrections or additions
- Support for other Tuya-based robot vacuums
Please open an issue first for any significant change.
MIT — do whatever you want, just don't blame me if your robot vacuums the cat.