Step 01
Purchase
The customer purchases a selected amount of water through the supported digital platform.
Project · Product development
Prepaid Smart Water Meter
Smart water management. Built for real-world use.
The Prepaid Smart Water Meter is A-Z SMART INNOVATIONS Ltd’s first smart infrastructure product, designed to make water access, payment, and consumption management more efficient and transparent.
01 / 05Keypad and cubic-metre dial
The system
From payment to the valve, without a live connection at the tap.
The system combines digital prepaid water credit, precision flow measurement, secure numeric tokens, local device communication, and automatic water control in a single solution.
Customers purchase water in advance through a digital platform and receive a secure token linked to their specific meter. The token can be transferred to the meter through a local Wi-Fi connection, allowing the meter to validate and apply the purchased water credit without requiring the physical meter to have a permanent Internet connection.
How it works
Six steps from purchase to supply.
Key features
Built for payment, measurement, and control.
Prepaid water management
Customers purchase water before consumption.
Accurate measurement
Water usage is measured and displayed in cubic metres (m³).
Secure digital tokens
Each purchase generates a meter-bound authorization token.
Offline-first operation
The physical meter can validate and apply credit without requiring Internet access.
Local Wi-Fi communication
Customers can transfer tokens directly from a mobile device to the meter.
Manual token entry
Provides an alternative method when automatic transfer is unavailable.
Automatic valve control
Water supply can be controlled according to available credit.
Persistent credit storage
Meter state is designed to remain consistent through power interruptions.
Device identification
Each meter has a unique meter number for identification and transaction management.
Scalable architecture
The platform is designed to support multiple meters, customers, transactions, and future monitoring services.
Technology
An ESP32-based meter, connected to a purchasing platform.
The broader platform connects the physical meter with digital purchasing and management services, creating a complete system from payment to water delivery and consumption measurement.
- ESP32
- Flow measurement
- Secure token validation
- Local Wi-Fi
- Digital credit management
- Valve control
- Display and keypad
- Persistent storage
Our approach
Reliability where the network cannot be assumed.
At A-Z SMART INNOVATIONS Ltd, we are developing the Smart Water Meter with a focus on reliability, security, affordability, maintainability, and practical deployment.
The goal is not simply to build a connected meter, but to create a solution that can operate effectively in environments where reliable Internet connectivity cannot always be assumed.
Project status
Product development
The Smart Water Meter is being developed as A-Z SMART INNOVATIONS Ltd’s first flagship technology product, with ongoing work covering embedded hardware, firmware, token security, water-flow measurement, valve control, digital purchasing, and system integration.
Our vision
From one meter to a water management platform.
We aim to make prepaid water management simpler, more measurable, and more accessible, while creating a technology platform that can grow from an individual meter into a larger smart water management system.
Next step