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Wireles data aquisition system with GPRS-MODEM

spYdaq Base-Station
spYdaq Base-Station

spYdaq - Low Cost Wireless Monitoring Solutions

What is spYdaq? 


spYdaq® is a system comprising of a number of radio transmitting sensors that measure parameters and send them securely by using a licence free radio network to a central Basestation. The data are sent using a Manchester Encoded error correcting code with multiple transmissions which, when combined with Antenna Diversity, ensures there is no loss of data in normal use from a properly installed system. Up to 16 transmitters can communicate to a single base station with each transmitter capable of having up to three inputs: Temperature, Relative Humidity or Universal - Universal inputs can be configured to accept almost any type of measurement sensor . The base station collects the data from the transmitters and connects via an RS232 serial port configured as a Modbus slave to our spYview software or any other Modbus master. 

There is also a USB port used for initial configuration of the base station using our spYconfig software. 

The wide range of inputs offered by the universal transmitter design enables virtually any parameter to be measured and logged by connecting an appropriate sensor. Parameters that can be measured and logged are: 

  • Temperature
  • Humidity
  • Pt 100
  • Thermocouple Types J, K, T, R, S
  • 4-20 mA - Scaled in engineering units
  • Voltage
  • Contact Closure 

The Basestation checks locally for alarm conditions with inbuilt audio and visual alarms as well as providing a switched contact output that can be used to trigger external devices. Alarming locally means that potential 

trouble spots can be quickly detected and corrective action taken immediately, perhaps saving an entire batch from damage.


Spannungsversorgung Batterie / Netzteil 10...28Vdc
Messbereich 15.488 Sätze von Messwerten und 255 Alarmereignisse
Typ. ausreichend für 6 Tage bei einem System mit 16 Transmittern und einer Abtastrate von 10 Minuten
Schnittstellen USB zur Datenübertragung und Konfiguration
EIA-232 zur Verwendung als Modbus-Slave
Alarmanzeige Akustisch, LEDs, potentialfreie Kontakte
LED-Anzeige 1 LED pro Transmitter zur Anzeige eingegangener Kommunikationstelegramme und zur Signalisierung eines Alarms
LCD-Anzeige 4x20 Zeichen zur Anzeige von System- und Alarmdaten sowie von Echtzeitmesswerten
Antennen-Diversity System wählt automatisch das stärkste Signal der beiden Antennen
Übertragungsfrequenz 433-MHz-Band
bis zu 4 Systeme können auf vier verschiedenen Frequenzen parallel betrieben werden
868MHz- und 915MHz-Systeme sind ebenfalls verfügbar
Übertragungsrate 20s, 1Minute, 10Minuten oder 30Minuten (per Schalter einstellbar)
Datensicherheit / Kodierung Mehrfache Wiederholung der Datentelegramme
Manchester-Kodierung, Fehlerkorrektur und Prüfsumme
Sendereichweite typ. >100m innerhalb von Gebäuden
(10mW Sendeleistung)

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