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USER MANUAL 

 

 

 

STM 429J – Scavenger Transmitter Module  

 

 

© 2017 EnOcean  |  www.enocean.com 

  STM 429J User Manual  | v2.0 | Nov 2017 |  Page 13/ 17 

 
 

3.2

 

Transmission range 

The main factors that influence the system transmission range are type and location of the 
antennas of the receiver and the transmitter, type of terrain and degree of obstruction of 
the  link  path,  sources  of  interference  affecting  the  receiver,  and  “Dead”  spots  caused  by 
signal  reflections  from  nearby  conductive  objects.  Since  the  expected  transmission  range 
strongly depends on this system conditions, range tests should categorically be performed 
before notification of a particular range that will be attainable by a certain application. 

The following figures for expected transmission range are considered as a rough guide only: 
 

 

Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls 

 

Plasterboard walls / dry wood: Typically 30 m range, through max. 5 walls 

 

Ferroconcrete walls / ceilings: Typically 10 m range, through max. 1 ceiling 

 

Fire-safety walls, elevator shafts, staircases and supply areas should be considered as 

screening. 

 

The angle at which the transmitted signal hits the wall is very important. The effective wall 
thickness  –  and  with  it  the  signal  attenuation  –  varies  according  to  this  angle.  Signals 
should be transmitted as directly as possible through the wall. Wall niches should be avoid-

ed. Other factors restricting transmission range: 

 

Switch mounted on metal surfaces (up to 30% loss of transmission range) 

 

Hollow lightweight walls filled with insulating wool on metal foil 

 

False ceilings with panels of metal or carbon fiber 

 

Lead glass or glass with metal coating, steel furniture 

The  distance  between  EnOcean  receivers  and  other  transmitting  devices  such  as  comput-
ers,  audio  and  video  equipment  that  also  emit  high-frequency  signals  should  be  at  least 
0.5 m. 

A  summarized  application  note  to  determine  the  transmission  range  within  buildings  is 
available as download from 

www.enocean.com

 

3.3

 

Connecting an external backup battery 

In  case  there  is  not  sufficient  light  available  for  operation  with  solar  cell  an  external  3  V 
Lithium backup battery can be connected to the module at the soldering pads shown below: 

 

 

 

 
 

 

Summary of Contents for STM 429J

Page 1: ...ser Manual v2 0 Nov 2017 Page 1 17 STM 429J Scavenger Transmitter Module Patent protected WO98 36395 DE 100 25 561 DE 101 50 128 WO 2004 051591 DE 103 01 678 A1 DE 10309334 WO 04 109236 WO 05 096482 W...

Page 2: ...possible omissions or inaccuracies Circuitry and specifications are subject to change without notice For the latest product specifications refer to the EnOcean web site http www enocean com As far as...

Page 3: ...Radio telegram 8 2 3 Secure radio telegram 8 2 3 1 Switching between modes 8 2 3 2 Encrypted communication enhanced security mode 9 2 3 3 Security Teach In enhanced security mode 9 2 3 3 1 PSK Securit...

Page 4: ...Features with built in firmware Pre installed solar cell On board energy storage and charging circuit On board LRN button operated from above on STM 429J On board TX indicator LED pointing upwards on...

Page 5: ...Scavenger Transmitter Module 2017 EnOcean www enocean com STM 429J User Manual v2 0 Nov 2017 Page 5 17 1 3 Physical dimensions PCB drawing STM 429J PCB dimensions 43 0 2 x 16 0 3 x 1 0 1 mm Module hei...

Page 6: ...USER MANUAL STM 429J Scavenger Transmitter Module 2017 EnOcean www enocean com STM 429J User Manual v2 0 Nov 2017 Page 6 17 System drawing STM 429J...

Page 7: ...es 7 Microchip EEPROM Memory www microchip com serialeeprom 8 EnOcean Equipment Profiles http www enocean alliance org eep 1 5 Environmental conditions Operating temperature 20 C 60 C Storage temperat...

Page 8: ...indicator LED flashes briefly at every radio transmission Between the wake up phases the device is in sleep mode for minimum power consump tion 2 2 Radio telegram 429J transmits a radio telegram accor...

Page 9: ...ry few are required The factory delivery mode of the STM 429J is standard not encrypted This mode is com mon mode originally available Secure mode was added in later product upgrades The mode change f...

Page 10: ...PSK The PSK must be in printed on the transmitting device To use PSK teach in the PSK must be read by the end user and entered into the other communication partner For this purpose the EnOcean radio i...

Page 11: ...pical performance parameters at room temperature have been calculated Wake and transmit cycle s Operation Time in darkness h when storage fully charged Required reload time h at 200 lux within 24 h fo...

Page 12: ...ransmitter Module 2017 EnOcean www enocean com STM 429J User Manual v2 0 Nov 2017 Page 12 17 3 APPLICATIONS INFORMATION 3 1 Antenna Details Antenna location recommendation 429J without host PCB 429J w...

Page 13: ...ling Fire safety walls elevator shafts staircases and supply areas should be considered as screening The angle at which the transmitted signal hits the wall is very important The effective wall thickn...

Page 14: ...the housing and the modules is available in igs format To prevent damage please make sure not to exert shear force side force within the plane of the solar cell onto the solar cell or the module itsel...

Page 15: ...ormation ID XXXXXXXX KY YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY ID 3 CHARS XX 8 CHARS FREESPACE 1 CHARS KY 3 CHARS YY 32 CHARS 47 CHARS 3 5 2 QR Code Specification QR Code Version 3 29x29 pixel Error Correct...

Page 16: ...nual v2 0 Nov 2017 Page 16 17 4 AGENCY CERTIFICATIONS STM 429J have been designed and tested to fulfil the approval requirements for ARIB STD T108 based on the built in firmware When the product is pl...

Page 17: ...17 EnOcean www enocean com STM 429J User Manual v2 0 Nov 2017 Page 17 17 5 Label Information 1 Product name STM 429J 2 Step Code xy 3 Date Code KW YY e g 15 13 4 Status D431 z e g 1 5 DMC 6 ARIB Marki...

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