Hardware setup issue

[fif10]

Hello

Thank you for this great project.
I am trying to use it with my stove, but I am having some issues ... on the hardware part.

I have those one

• NodeMcu V3 4MB flash ESP8266 12E
• TXB0104 Bi-Directional Level Shifter
  with a evacalor stove (PUNTO FUOCO Nelly 9.5 kw + duepi)

So far, I managed to flash the NodeMCU, connect it on wifi, (setup the custom_component on ha.)
On the hardware part I plugged it like this

The issue is that if I plug it with the stove, I get the 5V output, but nothing at the output of the level shifter where I should get the 3V.
I also tried to plug the nodeMCU with usb, I get the 3V output, but not the 5V on the level shifter. I guess that it should work as the level shifter is bi-directional
I try also by pluging the OE pin to the low level (3v). still the same...
Did I miss or misunderstood something ? Could you confirm that my setup is ok ? or should I buy and try with another level shifter ...

Also do I need to configure any thing on esplink for the pin assigment to set the serial pin TX/RX ?
Once plugged, is there some command I can run directly on esplink console to validate setup ?
If I send \x1bRD90005f& for instance, should I see the result in the esp console directly ?

Thanks a lot

[aceindy]

Hi fif10,

I basically have it like this:

except for the connector (this is the same set I also use for my Midea A/C)
Using these:

In ESPLink i use the default config:

And to answer your question, in the console I can see each transmitted command passing by:

This can also be done by using the stand-alone python commands

PS: you should be able to hook up any serial port on a PC, and then use telnet to send and receive to/from the esplink console; it is just a "serial over tcp" interface...

[aceindy]

I furthermore believe this has not much to do with Duepi Evo stoves

It sounds more like you have issues with getting ESP-Link working.
Maybe it is better to ask for support there?

[fif10]

Thanks a lot for all the info. That's what I needed.
I will try with another harware devices.