Search:     Advanced search

TB12N-WR Offline Hosted Sensor and Trouble connecting to WIFI

Article ID: 48
Last updated: 28 Jan, 2014
Revision: 60

Things you may need
  • Wifi information(SSID and password)
  • Paperclip (used to press service button)
  • Sensor utility software 
  • Sensor
  • USB cable


1. Check batteries by tapping the service button. NOTE: The LCD display falls asleep on it's own to preserve battery-life, tapping the service button briefly wakes up the display. The LCD display should read S or F and display a number. Remember the number displayed, then walk-test the unit by breaking the beam multiple times. Tap the service button again. The number on the display should have increased by the amount of beam breaks you have created. Note: Most sensors take 3.6V lithium AA battery, verify proper battery voltage by checking the battery compartment of your sensor. 

Wireless Router
2. Verify your wireless router is plugged in and powered on. Verify your router is within 100' (line of sight) of the sensor.
3. Verify you can connect to your WLAN by using a smart phone, tablet, laptop, or other wireless device.
4. Reset your wireless router by unplugging the power cord from the wall and waiting thirty seconds, and then plug the power cord back into the wall.
5. Firewall- Port 6767 UDP must be open for in and out traffic across your network from the sensor to the server.
Have your network settings have recently changed? If yes, they may be influencing this device. Make appropriate corrections. 
6. Plug the sensor with the LCD display into the PC with the Sensor Utility software (WiFi IR Beam Setup Tool) via USB cord, be sure the sensor utility says "found counter" on the bottom of the screen and then click "retrieve" the unit should read "sensor parameters retrieved". 
If you receive this error.
Then select Options>Radio Type>Wifi802.1b/g
When the appropriate radio type is selected you can retrieve your sensor settings. 
  • Network Settings- DHCP or static (static recommended) verify IP, Subnet, Gateway, and DNS are that of your network. 
  • WLAN- Verify SSID, channel (auto find recommended), authentication type, and phrase.
  • Destination- Verify "IP or Hostname" is the IP or hostname of the PC where the SQL database and SenSource software is installed. If you are a SenSource hosted customer your destination will be and IP of


  • Transmit Period- Reduce transmit period. This will increase the amount of opportunities the sensor will transmit data. (recommended 2 hour)

  • Tries- Increase the amount of tries (2 recommended)

  • Logging- Is independent of WiFi transmissions and will not affect Wifi connectivity. It relates to time bins data is stored in. (1 hour recommended)


  • Extended transmit period- Should be checked.

  • Connect Window- Set the connect window to 5 seconds or an interval above your average connect time results from your connection test. 

  • Data Rate- Set to 54g.

  • All other options should be disabled "unchecked on this screen.


  • IP Settings- Verify you have been assigned an IP address and are on the proper subnet and gateway.


  • Connection: Verify you are associated and authenticated

  • Signal Strength: Verify you are under -65 dBm (-65dBm or lower is excellent, -65 to -75 is good, -75 to -85 is fair, -85 to -95 is poor)


  • Test connect time- Use this tool to determine how fast you are connecting to your wireless access point. If you are struggling connecting and timing out then open up your connect window. See options>advanced (above).

  • Destination Test- Click the "Contact Destination Host" button. It should return “Successful”
Contact Us
7. If none of the trouble shooting steps above have worked then call SenSource technical support at 1-800-239-1226 ext. 300

This article was:   Helpful | Not helpful
Also read
document -Router list- (router models that have documented issues with WiFi sensors)
document TB12N-WR WIFI Best Practices
document Video - TB12 WIFI Sensor Utility

Prev   Next
TB12N-WR Joining to a Wireless Network (WIFI Version)     TB12N-WR WIFI Best Practices

[ ]