MCD Elektronik developed a programming and test station for smart home applications

The systems test and program Wi-Fi and ZigBee circuit boards efficiently, reliably and fully automatically – including frequency calibration, functional testing and database integration for maximum process reliability in series production.
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Challenges and concept

Smart home systems require reliable communication between the heating system, mobile devices and manufacturer services. The electronic assemblies transmit data via Wi-Fi and ZigBee while also communicating with the heating controller via CAN. They must therefore be precisely programmed, calibrated and tested.

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Blinker, Kamera, Heizung und Assistenzsysteme.

FCT Systems

Außenspiegel

Smart home systems

Automated programming and test station for smart home assemblies

MCD Elektronik developed an automated programming and test station for smart home components featuring Wi-Fi and ZigBee technology. The assemblies are programmed, calibrated and tested, with particular emphasis on frequency calibration and secure data communication.

Shielded RF measurement technology, MCD TestManager and database integration create reproducible test conditions. Fixtures, visual user guidance and label printing support a safe series-production process.

Parallel programming
Up to 4 units under test
Programming time
Approx. 30 s for 4 circuit boards
Total test time
Less than 1 min

Ein flexibler End-of-Line-Prüfstand

MCD entwickelte hierfür einen flexiblen End-of-Line-Prüfstand, der sämtliche Varianten innerhalb von weniger als 30 Sekunden prüft. Das System kombiniert optische, mechanische und elektrische Prüfverfahren zu einem durchgängigen Prüfkonzept.

Produktvarianten

Produktvarianten

Über 30

Taktzeit pro Bauteil
Taktzeit pro Bauteil

Unter 30 s

Qualitätskontrolle vor Auslieferung

Qualitätskontrolle vor Auslieferung

100 %

Produktvarianten

Produktvarianten

Über 30

Taktzeit pro Bauteil
Taktzeit pro Bauteil
Unter 30 s

Qualitätskontrolle vor Auslieferung

Qualitätskontrolle vor Auslieferung

100 %

Test and functional scope

The functional test station handles programming, RF testing, communication testing and process control of the smart home assemblies within an automated production sequence:

Programming and test station for smart home assemblies
Overall view of the test station
Test adapter, RF hood and operator monitor
RF measurement technology of the test station
Detailed view of the measurement technology
Spectrum analyzer and system control
Test fixture for multiple smart home assemblies
Detailed view of the test station
Multiple fixture, contacting and operator monitor

Up to four units under test are programmed simultaneously and provided with user-specific data.

  • Fully automated programming of up to four units under test
  • Parallel or separate programming in three modules per unit under test
  • Programming time of approximately 30 seconds for four circuit boards
  • Programming Wi-Fi IDs and passwords

Wi-Fi and ZigBee signals are tested and calibrated without contact in a shielded RF environment.

  • RF measurement inside a shielded RF hood
  • Contactless frequency testing using an antenna
  • Frequency calibration using a spectrum analyzer
  • Testing Wi-Fi and ZigBee signals

Communication and electrical operating parameters are monitored during the test sequence.

  • Functional test via Raspberry Pi and CAN interface
  • Voltage tests
  • Signal tests
  • Ensuring stable operating parameters

Software-supported process guidance and protective mechanisms reduce operating errors and incorrect process steps.

  • Continuous monitoring via the MCD TestManager
  • Database-supported process control
  • Reverse-polarity and operating-error protection
  • LED status display and integrated emergency stop switches
Bauteilaufnahme im EOL-Prüfstand
Kamerasystem im EOL-Prüfstand

Multifunktionaler Außenspiegel · Symbolbild

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Einblick in die MCD Prüflösung

Variantenspezifische Prüflogik

Der Prüfstand überprüft sämtliche vorhandenen Funktionen des Außenspiegels:

Kamerasysteme kontrollieren Lichtfunktionen und Spiegelstellungen, während Antriebe, Klappmechanismen und elektrische Funktionen automatisiert getestet werden.

Verstell- und Klappfunktion

Spiegelheizung

EC-Abblendglas

Ein Kamerasystem erfasst Lichtfunktionen, Symbole und die Spiegelstellung.

Blinker

Spurwechselassistent

Umfeldbeleuchtung

Unterschiedliche Ausstattungsmerkmale werden automatisch erkannt und gezielt geprüft.

Kamerafunktion

Länderspezifische Varianten

Auch das Nicht­vorhandene zählt.

Die Negativprüfung stellt sicher, dass sich nicht verbaute Ausstattungsmerkmale nicht aktivieren lassen. Geprüft wird auch, was fehlen muss.

mcd_plus_white
Efficient series-production process with automatic labeling

Automatic QR and barcode label printing supports rapid commissioning. Optimized test sequences enable an overall test time of less than one minute, combining extensive test coverage with short cycle times.

Test methods used and challenges

The station combines RF measurements, spectrum analysis, communication tests, and voltage and signal monitoring. The main challenges are stable wireless measurements, different wireless standards and coordinated hardware and software integration.

RF and frequency measurements
Evaluation of Wi-Fi and ZigBee signals
Contactless frequency testing inside the RF hood
Frequency calibration using spectrum analysis
Communication and functional testing
Functional testing via Raspberry Pi
Communication via CAN interface
Voltage and signal monitoring during the test sequence
Programming and process control
Automated processing of customer-specific programming data
Sequence control via the MCD TestManager
Database-supported control of programmed assemblies
Process and measurement challenges
Stable and interference-free measurement of high-frequency signals
Safe processing of different wireless standards
Coordination of hardware, test software and database
Extensive test coverage with short cycle times and high process reliability
Funktions- und Qualitätsbewertung
Eine besondere Herausforderung ist die hohe Variantenvielfalt der Außenspiegel. Unterschiedliche Ausstattungsmerkmale werden automatisch erkannt und gezielt geprüft.

Prüfung komplexer Ausstattungsvarianten

Sichere Erkennung von Fehlerbildern

Reproduzierbare Ergebnisse

Optische Prüfungen

Ein Kamerasystem erfasst Lichtfunktionen, Symbole und die Spiegelstellung.

Kamerabasierte Erkennung von Lichtfunktionen

Analyse von Spiegelstellungen

Kontrolle des Spiegelglases

Mechanische und elektrische Prüfungen

Antriebe und Klappmechanismen werden mechanisch geprüft, während Winkelpositionen bestimmt sowie Spannung und Stromaufnahme gemessen werden.

Bewegungsprüfung der Antriebe

Winkelmessung der Klappfunktion

Stromaufnahme der Motoren

Funktions- und Qualitätsbewertung
Eine besondere Herausforderung ist die hohe Variantenvielfalt der Außenspiegel. Unterschiedliche Ausstattungsmerkmale werden automatisch erkannt und gezielt geprüft.

Prüfung komplexer Ausstattungsvarianten

Sichere Erkennung von Fehlerbildern

Reproduzierbare Ergebnisse

FREQUENTLY ASKED QUESTIONS

FAQS

The test station is designed for circuit boards used in smart home applications, particularly assemblies featuring Wi-Fi and ZigBee communication as well as an additional CAN connection. These are used, for example, in modern heating and home automation systems to inform users via communication with mobile devices about performance, status and faults.
The functional test system programs device parameters and access data, performs functional communication tests, RF measurements, and voltage and signal tests. The RF-shielded test environment enables Wi-Fi and ZigBee signals as well as wireless behavior and communication logic to be measured, analyzed and calibrated without interference.
The station enables up to four assemblies to be programmed and tested simultaneously, significantly increasing series-production efficiency. A complete cycle for four circuit boards takes only approximately 30 seconds, as specified by the customer.
This ensures that the correct software and parameters are first transferred to the circuit boards and that only correctly prepared units under test proceed to functional testing. Both systems are linked through a database, preventing incorrectly or incompletely flashed circuit boards from undergoing further testing.
The system incorporates the central TestManager CE software solution as well as numerous MCD tool monitors and control units for the test sequences. These include switchable USB hubs. The test adapter receives all stimuli exclusively through a main connector, which structures the contacting process and makes the test setup reproducible.

KEY FACTS

Key facts at a glance

Test system
Functional test system / Automated test system
Handling
Semi-automatic / automated
Concept
Multi-unit test stand with multiple fixtures – up to 4 circuit boards in parallel, consisting of a programming station and functional tester
Test methods & test scope
Electrical: Voltage measurements
RF / frequency: RF and frequency signals for Wi-Fi and ZigBee
Communication: Wi-Fi, ZigBee, CAN and
Raspberry Pi communication
Programming: Programming user-specific data such as Wi-Fi ID and password
Components
TestManager CE, DataManager tool monitor, Serialline tool monitor, MIO1616, USB Hub 2.0, spectrum/signal analyzer, Raspberry Pi, RF hood

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