The basic meter impresses with its modern design and advanced encryption security.
However, these technical strengths also bring complexity — such as PIN entry, crypto reset, or reading SYM parameters.

From our daily development work arose the idea to create a tool that significantly simplifies these processes:
? the DIINNO Toolbox App.

Originally developed for internal testing, the app has proven extremely useful in practice and is now available to the entire industry.

1. Core Feature: Advanced LMN Functions
Full Control of the LMN Interface

The LMN interface serves as the communication hub of the basic meter but has previously been difficult to access.
With the LMN-USB12V adapter, your smartphone becomes a versatile testing station:
Crypto reset, SYM6/7 setting, pairing, and TAF7/10 via TLS — all with a single tap.

The Toolbox automatically stores SYM keys and uses the initial key during pairing,
eliminating unnecessary resets.

The test mode defined in the FNN specification is fully integrated
and reduced to intuitive, user-friendly control panels.

2. Core Feature: PIN Entry & Info Data
Effortless PIN Entry

Anyone who has ever entered a PIN using a flashlight knows the struggle:
One small mistake or a second too late — and you have to start all over again.

With the DIINNO Toolbox, simply enter four digits in the “PIN Entry” module,
and the smartphone’s flash automatically sends the correct light signal to the meter.

Real-Time Data Capture

Thanks to the OTG power supply function, the smartphone can be directly connected to the OKK-USB adapter,
allowing real-time display of INFO interface data in the app window.

Long-Term Data Recording with OKK-WIFI

For long-term data storage, use our OKK-WIFI adapter:
Meter data is securely stored on a server and can be fully visualized in the DIINNO Life App —
including load curves and daily, monthly, and annual charts.

3. Benefits & Support
Your Essential Tool – Cost-Effective and Efficient

The DIINNO Toolbox greatly improves work efficiency.
Many operations can now be performed directly via smartphone —
without transporting the meter to a testing device.

Free to Use

Even after the trial phase, most functions of the Toolbox remain available free of charge.

Regular Updates & Support

We provide ongoing technical support and regular feature updates
to ensure your app is always up to date.

Feedback Function

Use the integrated feedback feature to submit your requests or suggestions for improvement at any time.