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Easy to install Web Relay

Mike-VA3MW FlexRadio Employee, Community Manager admin

Tim and I have been searching for a Web relay that would work world wide.

We found the SonOff 4 Channel Pro relay that is available on Amazon World Wide and at very good prices.

There seems to be a few versions of this switch, but the one I tested had 4 SPDT Switches

The device is powered by 9-24V DC or 90-260VAC. The one I have requires a Canon connector for the 12V I used, but others may have a quick connect terminal. You should have no issue powering it from a Wall Cube that you already have in a junk box.

The one I tested was the V2 and I was able to use it to connect to the Remote RCA connector on the back of the radio for soft power up and power down.

I also used a 2nd contact for PTT should you ever need to do a remote SmartLink registration.

They make many versions of this, but you want the one that shows the NO/NC contacts as on the bottom of the case.

It does require that you use the eWeLink app on your SmartPhone (I only tested on iOS). https://www.ewelink.cc/en/

I did a very basic schematic that you can reference. R1 turns the radio ON and OFF and R4 would do a 1 second PTT to the radio. You need to set R4 for 'inching' and you do that in the eWelink application.

I found that on the one I had, I had to open the box and change some dip switches.

S6 had to be set to 1 and K5 had to be set to all 1's (closest to the relays).

I have yet to test it beyond basic functionality, but there does look like there is a bunch of Node-RED flows for it as well.

Just another solution for the toolbox!

Mike va3mw


  • DL5VZ  Alexander
    DL5VZ Alexander Member
    edited January 20
    Hello i use 2 Sonoff 1Channel webRelais for this job for years with my 6400M without problems, to start the radio remote. i can highly recommend them. with these switches i control my amp, antennaswitch, Reversible BOG and my symetric ATU from remote destination and it is working fine here. give it a try, 73s Alexander, DL5VZ

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