You might have a competing wifi channel in your home causing the LCS wifi to conflict with it.

From the manual...

Changing the WiFi Channel In most installations, it will not be necessary to change the LCS WiFi’s channel. However, if you suspect your LCS WiFi is in conflict with another newrby WiFi network, you may improve performance by changing your LCS WiFi’s channel.

To Change the LCS WiFi channel:

1. Hold the WPS button for 2 seconds while in Access Point mode to activate the WiFi Channel selection mode.

2. In channel selection mode, the RED and GREEN LEDs blink the count of the current channel selected (default is channel 1) with a 1 second pause.  This sequence repeats twice, and then the channel selection mode is exited.

3. Once you have counted the blinks to determine the current channel, press the WPS button to increment the channel number.  Valid channels are 1 to 11, so the maximum blinks observed will be 11.   After channel 11 is reached and incremented, the LCS WiFi channel will wrap back to channel 1.


Most obvious thought - your router may NOT be broadcasting its SSID identity - log in to your router and check security in the WiFi section, check this before pulling your all of hair out!  Setting should be as seen below or your LCS WiFi will never "see" your router:

Found in Basic Wireless Settings -

     Wireless SSID Broadcast: = ENABLED



I was tired yesterday and I'm tired again today so I must be...


Flyergarden posted:

I have a problem with my LCS wifi module.  I have connected and powered up the unit. The unit is set to "Base" and "Access Point".  The green light flashes but I cannot see the wifi signal on my devises.  I have used my iPhone, iPad and several laptops. None of them showed the Lionel LCS – XXXX as a wifi network. I returned one unit to store and got another one but have the same problem. Does anyone know why I cannot see the wifi network it should be generating?  thanks.

Actually now that I think of it, I do not see the "Access Point" as a wifi in Settings on my iStuff. I only see that it's connected when opening the app LCS and only on the LCS app. The link up top right goes from red to green and everything works as it should. My iPad for example still shows my home wifi network in Settings while the LCS app is working fine with it set to "Access Point".


Interesting.  I always see the LCS in my list of WiFi devices when it's set as an access point.  Only when it's in "Join Network" mode do I select the host network.



Below the Signature...

" Number One, make it "O"!"


Thought I would post this so there is a record of the solution.

Ever since I acquired a sensor track I had a issue with it not triggering reliably  when a sensor equipped locomotive passed over it.

Having some time over the holidays to fully investigate. Finally got to the bottom of the problem. Thanks to some help from forum member Albrecht.

I run a pure sine 60Hz inverter powered by a DC supply as the 50Hz UK power causes other issues with TMCC.

The issue with the sensor track is electrical noise from the DC power supply. The AC component is present on the DC output feeding the inverter. 

I had a diffrent DC power supply from another project and swapped this for the existing DC supply and the sensor track triggers perfectly every time. 

Next stage is to find a DC noise filter to place between the DC power supply and the inverter.  For my large inverter I need one capable of taking about 100amps.


I have done some further testing with my other inverter and this one appears to have a electrically "noisy" output.

This units fault is not from its DC supply.

So it appears I had one noisy DC supply that caused an issue with one inverter set up and the other one had issues with the actual inverter.

From experience helping other club members with their pure sine inverters. All inverters are not created equal. There are some big differences in quality and operation.

Just for reference  Legacy/TMCC operation appeared normal until addition of the LCS. 


Bill_R posted:

does anyone know what is the maximum length allowed between the blue LCS boxes.  I know the longest cable Lionel makes is 20', but i need more to get from one side of the room to the other.

Lionel has a joiner for two cables. You have to call them to order though.File%2520Oct%252017%252C%252010%252006%252013%2520AM



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The termination CJack mentioned is a noise filter which relevant only to SensorTrack. It is available from customer service and prevents your SensorTrack from spontaneously dropping out of record-ready mode while waiting for the locomotive to roll-over. If you aren't having that issue, it is not necessary to use it.

Rudy Trubitt

Past Director of Audio, Lionel, LLC (2011-2018)

 Ironically the reason I need appx. 35 ‘ is for the new 2 IRLVS Track  sensors.  Rudy I have never had a problem before but could this long run between blue boxes cause this Issue to rear  its head.  If so what is the part number for said noise filter.   Thanks I advance for your response.

I don't think there is a part number, but here are the pics of it. It's just called the "LCS Buss Termination".LCS Buss TerminationLCS Buss Termination2


I think that is a tantalum capacitor connected to two pins side by side. I cannot read the value. I think the wire is just a way to pull it out of the connector you put it into. It looks like it's between +5vdc and RCV

The LCS connectors are the Molex Pico-Spox 1.5mm connectors.  Molex 0874390400, the pins are Molex 0874210000.  I crimp them with the Engineer PA-09 Crimper, the same tool I use for most Lionel and MTH connectors.



Photos (3)
Bill_R posted:

 Ironically the reason I need appx. 35 ‘ is for the new 2 IRLVS Track  sensors.  Rudy I have never had a problem before but could this long run between blue boxes cause this Issue to rear  its head.  If so what is the part number for said noise filter.   Thanks I advance for your response.

Dean in Customer Seervice provided me a part number for the noise filter, which is:


Rudy Trubitt

Past Director of Audio, Lionel, LLC (2011-2018)

Hi Folks,

I'm new to the forum. I have a 16 X 15 ft S Gauge layout modeling the Tenn Central Railway(TCRY) during the 1940-1968 period. I operate Am Models, lionel/Am Flyer, S Helper and MTH S Gauge engines. Equipment is Hi rail with  Kadee or other scale couplers. All engines are Lettered and numbered for the TCRY. I have approx. 300 ft of Am S Gauge flex track,17 of their turnouts (with tortoise switch machines) and 10 Am Flyer 720A turnouts. There are four main lines, a round house and turntable track with 6 stall roundhouse, ready track and stub siding.There is also a transition track to the upper tier. There are four reverse loops, two passing sidings, 2 connecting crossovers, and 17 stub sidings, I have Lionel LCS control and MTH DCS control.

I have both Wi-Fi systems installed with the MTH APP, and Lionel LCS APP for iPad and LCS iCab APP downloaded to my iPad. I have the LCS DB9 cable w/power supply, LCS Wi-Fi module, LCS Serial Convertor 2(SER2), LCS Sensortrack, LCS Sensortrack, LCS Switch Throw Monitor(STM2), STM2, STM2 connected in that order. I have modified the Sensortracks for use under American S Gauge track.I have a TIU/TMCC-Legacy cable connected from the (SER2) to the MTH TIU (2) and AIU (3) system. I have five older TPC's and 2 BPC's daisy chained to the SER2. On the layout I have 7 SC2 switch accessory controllers. With this equipment I can control all 27 turnouts, accessories, reverse loops polarity, blocks, and all conventional , TMCC, and Legacy engines from my Cab I or Cab II controllers. I can also control all MTH engines from these controllers, but in conventional mode only. I can control all turnouts, accessories, reverse loops polarity, blocks, and all TMCC, Legacy and MTH DCS engines with the MTH controller. 

From the Lionel APPS I can control all turnouts, accessories, reverse loop polarity and TMCC and Legacy engines. I can monitor or throw turnouts from the LCS App for iPad. I have a track and turnout diagram of my layout on that APP and can throw turnouts by touching the turnout on the diagram. Also, if a turnout is thrown from either the Lionel or MTH controllers Or APP the position is reflected on the diagram. From the MTH  APP I can control all MTH, TMCC and Legacy engines in command control. I can also control all turnouts, accessories, and reverse loop polarity. 

What I cannot do is control conventional engines from either Lionel APP. The way I have the two MTH TIUs installed on my layout I am not using the variable circuits because of other considerations and therefore cannot control conventional engines from that APP. Although I have five TPC's daisy chained to the SER2 I understand that I still cannot set the track voltage to variable and control it from the current APP. I also understand that I cannot control the 8 track blocks controlled by the 2 BPCs' also daisy chained after the TPC's.

Please let me know if anyone knows if there is any present or plan for a future method to control conventional engines from either of the Lionel APPs. Thanks for reading all this.

Tom Robinson

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