Troubles using I2C/IIC bus

[ksarz]

I am having troubles using I2C interface on KC868-A6-V1. Programming using Arduino IDE 2.3.6
So I tried running programmes for digital inputs, relays and the built-in "Wire Scan" example with a sensor connected and none of them work. Here are the error texts:

Wire Scan:
"EScanning for I2C devices ...
E (522034) i2c.master: probe device timeout. Please check if xfer_timeout_ms and pull-ups are correctly set up
Error 5 at address 0x01
E (522094) i2c.master: probe device timeout. Please check if xfer_timeout_ms and pull-ups are correctly set up
Error 5 at address 0x02
(all the other adresses)
(529474) i2c.master: probe device timeout. Please check if xfer_timeout_ms and pull-ups are correctly set up
Error 5 at address 0x7D
E (529534) i2c.master: probe device timeout. Please check if xfer_timeout_ms and pull-ups are correctly set up
Error 5 at address 0x7E
No I2C devices found"

Relays:
"E(76561) i2c.master: I2C hardware NACK detected
E (76561) i2c.master: I2C transaction unexpected nack detected
E (76561) i2c.master: s_i2c_synchronous_transaction(924): I2C transaction failed
E (76567) i2c.master: i2c_master_multi_buffer_transmit(1186): I2C transaction failed"

Digital inputs:
"E (9060) i2c.master: I2C hardware NACK detected
E (9060) i2c.master: I2C transaction unexpected nack detected
E (9060) i2c.master: s_i2c_synchronous_transaction(924): I2C transaction failed
E (9066) i2c.master: i2c_master_receive(1240): I2C transaction failed
KEY1 PRESSED
KEY2 PRESSED
KEY3 PRESSED
KEY4 PRESSED
KEY5 PRESSED
KEY6 PRESSED
KEY7 PRESSED
KEY8 PRESSED"

[admin]

do you have defined SDA and SCL pin in arduino code?

[ksarz]

do you have defined SDA and SCL pin in arduino code?

they are. I have both redefined pins in the files and defined them in Wire.begin()

[admin]

you can use our arduino demo code directly to test.

[ksarz]

you can use our arduino demo code directly to test.

yeah, I did. The relay and digital input programmes are the demo ones

[admin]

do you use this demo?
https://www.kincony.com/forum/showthread.php?tid=1866
do you have installed PCF8574 arduino library firstly?

[ksarz]

do you use this demo?
https://www.kincony.com/forum/showthread.php?tid=1866
do you have installed PCF8574 arduino library firstly?

Yes, this one and https://www.kincony.com/forum/showthread.php?tid=1865

Yes, I have the library

[ksarz]

Also, were the relay LEDs supposed to turn on and then off one by one every time the board was powered? Because they did first few times, but now they don't

[admin]

that's factory testing firmware, after you downloaded arduino code, it will be over write on ESP32.

[ksarz]

I need to flash the controller before starting programming UART and I2C?

---

вы используете эту демоверсию?
https://www.kincony.com/forum/showthread.php?tid=1866
вы сначала установили библиотеку PCF8574 Arduino?

Тhis Demo version dies not work correct,sorry.