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SWV — SmartKembo Water Vending

Sell Water Intelligently No Cashier · No Waste · Revenue 24/7

A customer inserts coins — the SWV machine dispenses exactly the litres they paid for, then shuts off automatically. You monitor everything from your phone: revenue, litres sold, machine status — anywhere, anytime.

Apply for Your SWV Machine → How It Works
⚡
Works without a cashier
📡
Online via 4G SIM card
🇹🇿
Built in Tanzania
SWV-001 · LIVE DEMO
Online
Select amount
Tsh
SUPPLY SOLENOID VALVE ━━━ FLOW RATE 0.0 L/min YF-S201 0 0% — — —
24+
Active machine owners
±0.1L
Dispensing accuracy
24/7
Operates without a cashier
4G
Online without WiFi
Process

How SWV Works

Simple for the customer — powerful for the owner.

01
🪙
Customer Inserts Coins
They insert TZS coins — one or more. The LCD displays their balance and how many litres they will receive at the current price.
02
▶
Press One Button
A single button press. The Arduino Mega opens the solenoid valve and water starts flowing immediately.
03
💧
Exact Litres Dispensed
The YF-S201 flow sensor counts litres with ±0.1L accuracy. The valve closes automatically — their litres only, not a drop more.
04
📊
You See It in Real Time
The ESP32 sends transaction data to the server within minutes. View revenue and litres on your dashboard — live, from your phone.
Features

Everything You Need to Sell Water

A complete system — from the first coin to the monthly report.

🪙
Coin Vending
Accepts all TZS coins. No M-Pesa app required — accessible to every customer, even without a smartphone.
✓ Live
📡
Online via 4G SIM
The owner's SIM card connects the SWV machine to the internet. Data is managed by SmartKembo — you don't need to do anything.
✓ Live
📊
Real-Time Dashboard
See today's revenue, litres dispensed, and a live animated bucket showing exactly what your customer is doing — from anywhere.
✓ Live (Subscription)
💰
Update Price Instantly
Raise or lower the price per litre directly from your phone. The SWV machine updates automatically within minutes — no site visit needed.
✓ Live (Subscription)
🔵
Bluetooth Configuration
Change price, flow calibration, and machine settings via your phone's Bluetooth — no wiring, no tools. Available on Basic Plan.
✓ Live
🔔
SIM Data Managed by SmartKembo
We monitor the SIM card's data balance. When it gets low, SmartKembo buys more automatically. You never worry about connectivity.
✓ Live
Owner Dashboard

Manage Your Water Business From Your Phone

app.smartkembo.co.tz · SWV Dashboard
Tsh 47K
Today
940L
Litres
188
Customers
Revenue — Last 7 Days
14:32
5.0 LTsh 250
14:18
10.0 LTsh 500
13:55
2.0 LTsh 100
13:41
20.0 LTsh 1,000
💧
Live Bucket Animation
Watch the bucket fill and empty in real time as your customer collects water — even from hundreds of kilometres away.
📈
Detailed Reports
Daily, weekly, and monthly revenue. See your peak hours and identify your best-performing days.
⚙️
Update Price Without Bluetooth
Change the price per litre from your dashboard. The SWV machine syncs automatically — no physical visit required.
🔐
Your Account, Your Data
Log in with your email and password. Your business data is private — nobody else can see your revenue or transactions.
Hardware

SWV Technical Specifications

SWV Machine Hardware
Main ControllerArduino Mega 2560
Online ModuleESP32 + SIM800A
Real-Time ClockRTC DS3231
Flow SensorYF-S201 Hall Effect
ValveSolenoid 12V DC
DisplayLCD 16×2 I2C
Accuracy±0.1 Litres
Power220V AC · Solar Ready
Software & Connectivity
BackendNode.js + PostgreSQL
HostingRailway
Device ProtocolHTTPS REST API
HeartbeatEvery 5 minutes
Supported NetworksVodacom · Airtel · Tigo
Monthly Data Usage~5–15 MB only
DashboardWeb · Mobile + Desktop
Server Uptime99.9% guaranteed
Pricing

Choose the Plan That Fits You

The SWV machine works without a subscription. The online dashboard requires a subscription only.

Basic
Machine only · Offline
Free
No monthly fee
Apply for Machine
✓
Coin vending (all TZS coins)
✓
LCD shows balance and litres
✓
Bluetooth config (price, calibration)
✓
SMS commands (balance, price)
✗
Online dashboard
⭐ MOST POPULAR
Subscription
Machine + Online Dashboard
30K
Tsh / month · SmartKembo pays for data
Start Subscription
✓
Everything in Basic
✓
Real-time dashboard
✓
Live bucket animation
✓
Update price from your phone
✓
Full transaction history
✓
4G data — SmartKembo pays
Enterprise
Multiple machines · Large operations
200K
Tsh / month
Contact Us
✓
Everything in Subscription
✓
Multiple machines, one dashboard
✓
Full API access
✓
99.9% SLA guaranteed
✓
24/7 priority support
Get Started

Ready to Start Selling Water?

Apply for your SWV machine today. We'll contact you within 24 hours to approve your application and begin installation.

Apply for Your SWV Machine → WhatsApp Us
No registration fee · We contact you · Installation within 2–3 days