Hello,
I am using the KC868-A6 board and reading digital inputs through the PCF8574.
I need to know whether the INT (nINT) pin of the PCF8574 is connected to any GPIO pin of the onboard ESP32.
I have checked the hardware documentation, but I could not find a clear answer.
Some older forum posts suggest that the INT pin might not be connected at all, but I want to confirm this specifically for the KC868-A6.
Could you please clarify:

1. Is the PCF8574 INT pin connected to the ESP32 on the KC868-A6 board?
   
2. If yes, which ESP32 GPIO pin is it wired to?
   
3. If not, is there a pad or test point where the INT pin can be accessed so we can wire it manually?
   
4. If possible, could you share the related portion of the schematic or PCB layout showing the PCF8574 connections?
   

Does anyone know anything about the u8g2 library for the SSD1306 librarry onflicting with pcf8574?  It seems that as soon as I write to the display the inputs connected to pcf8574 controllers stop working.

I am just using standard sample code for u8g2 from this site.  But have included it in a much larger sketch.  With the u8g2 firstpage / nextpage loop my pcf8574 inputs work fine.  But as soon as I include those commands the inputs stop working.

Hi,

I have an N30 but is there a installation manual how install a yaml file on it for Home Assistant.
And where can I find the Home Assistant yaml configuration file for ethernet/wifi/lora for the N30.

Hello everyone. According to schematics of KC868-A16, P-MOSFETS are used in DO circuits. Is there any
a)  KC868-A16 alternaatives with another schematics
b) possibility to orded specific boards whith N-MOSFETS schematics 
In all other aspects this board perfectly siuts my needs and I'm looking for opportnity to use it but the MOSFETS type in DO is extremly important in my case.

I have an e16t controller. Since the purchase, I have been using tuya (factory firmware). I recently decided to try a smart home based on the Home assistant. The Home assistant is installed on Raspberry pi5.
I found a post on the forum that you can install a new configuration file on the e16t (via esphome), which will allow you to control the relay via tuya and home assistant.
I did everything according to the scheme, and I ran into such a problem that esphome does not see the connected e16t device via usb. I used the cable from the e16t kit, I also tried to use another cable, but with no result.

After that I tried to connect e16t to PC (windows), but PC cannot detect e16t. The driver for the ch340c is installed.
Nothing happens when connected to a PC.

Can you tell me how to solve this problem?

I am building an off-road caravan and wish to use a simple smart switch to control the lights, etc. I found Kincony's Lesson 3 - Control relay by wall switch video on YouTube of a KC868-A4 receiving a momentary input switch that toggled the output relay on, a second momentary input toggled the relay off. It was perfect. I could have momentary switches in multiple locations to operate the same light (relay). I needed more relays, so ordered the larger A8 online.
I have zero experience with Arduino or ESP32, but I hoped to learn off the online examples. As part of that learning I discovered the A4 is different to the A8 through the addition of the PCF8574 to expand the I/O. I have managed to successfully upload the code from the Kincony - Arduino Lesson 19 on using the PCF8574, so I have the settings correct, I just can't find any code examples for making the A8 behave like the A4 example in lesson 3.
As a novice, could someone please point me in the right direction for the code to use a momentary press of a dry contact switch on an input to energise its corresponding relay, a second momentary contact on the same input to de-energise that relay again.
Obviously for all 8 inputs to control 8 relays. I would really appreciate it.

I have a Kincony KC868 A8 V3.1 board. After flashing the firmware and powering it on, the display shows "Kincony" and the yellow LED starts blinking. The board doesn't display the IP address. What's wrong with the board?

Hi Admin,

Is it possible to use LoRa for indoor connectivity?

Hello,

I'm trying to connect to two KC868-A16's yesterday. I have a MacBook Air M4, connected the devices with several cables, even tried to use two hubs to connect through USB, but the devices were not recognised. Then I tried a MacBook Air M1, then a raspberry pi 5, and finally borrowed a Windows 11 laptop. None of these devices recognised any connection to the usb port at all.
Even without USB, but connected to ethernet, the KC's didn't get an ip-address, nor was there a new AP I could wirelessly connect to (when I didn't attach the network cable).

The power light was on, I did push button 2 when connecting through USB (I also tried without).

Can I safely assume that both KC's are dead?

Thanks,
Hans

When using digital input in  IFTTT trigger action, what option do I select:
true, 
false,
rising edge, etc
to trigger the action?