KC868-A16 V1.5 I2C PCF8574 address updated

[admin]

some of KC868-A16 V1.5 hardware version, PCF8574 address is changed. (if you have seen PCB is V1.5 and have GREEN label, you need to use new address value)
before is :

Relay_IIC_address 0x24
Relay_IIC_address 0x25

Input_IIC_address 0x21
Input_IIC_address 0x22


new is :

Relay_IIC_address 0x3C
Relay_IIC_address 0x3D

Input_IIC_address 0x39
Input_IIC_address 0x3A

   

if you don't know your PCF8574 address, you can use this "I2C scan" arduino IDE source code to scan address, it will print value by serial port.

here is source code: 
  i2c-scan-a16.zip (Size: 645 bytes / Downloads: 432)

[LTDU]

FYI, one address was different for my board (hardware rev 1.5) thus failing to initialize: 3B, instead of 3A.

Code:

I2C scanner. Scanning ...
Found address: 57 (0x39)
Found address: 59 (0x3B)
Found address: 60 (0x3C)
Found address: 61 (0x3D)
Found 4 device(s).

[admin]

it's normal, some times different chip have different I2C address.