ESP8266 Community Forum

- Sun Nov 27, 2016 9:37 am #58753 Hello guys. This is my first post here. Kind of a noob in the IoT world.

About a month ago, I got these wifi relays from ebay. They are supposed to be plug and play with a basic web server and on/off switch, but I have been trying to make them work since then without any luck.

Although I am not sure at all, I have come to the conclusion that the guy that sold them, has made some mistake with the firmware he has put on. I arrived to this conclusion, since I am able to see and connect to the SSID, but nothing more can be done from there on. No http server and with some android apps I tried, most I could get was to see an activity (from the onboard led) but then the device would reboot.
I have also tried to connect through serial port (there are 3 pins on board: TX-RX-GND) - no luck there either.

Can anybody from you understand what could be the case here and maybe give some pointers/directions? I can only provide a picture of the board, since no manual or anything else is available for this device.

Thanks in advance
Panagiotis

You do not have the required permissions to view the files attached to this post.

- Thu Dec 01, 2016 6:15 am #58936 Hi panagiotis!

Your module looks like a Sonoff relay https://www.itead.cc/sonoff-th.html
But the most known and cheap is this one: https://www.itead.cc/sonoff-wifi-wireless-switch.html

On the last one, i can upload new fimware with USB to TTL cable, like you can see in this video: https://www.youtube.com/watch?v=_389pQPLyr8
As you told it in your post, there is GND/RX/TX Pins but you need a VCC pin too upload firmware. Under the board, don't you have information about a VCC pin?

- Mon Dec 05, 2016 3:30 am #59117 Thanks for the reply.

No there is nothing onboard (or under it), indicating a VCC

- Mon Dec 05, 2016 3:31 am #59118 Thanks for the reply.

No there is nothing onboard (or under it), indicating a VCC