03-18-2023, 10:50 AM
Hi all,
I am having an issue with this board.
I configured ESPHome as per your instruction but one PCF8575TS (address 0x25) corresponding to outputs 17-32 is not working properly.
All other PCF8575TS are perfectly working.
I checked voltage on pin A0, A1 and A2 of PCF8575TS (according data sheet these pins are defining the address) and everything is correct (A0 3.3V, A1 GND, A2 3.3V).
ESPHome log says:
[11:48:35][C][pcf8574:021]: PCF8574:
[11:48:35][C][pcf8574:022]: Address: 0x24
[11:48:35][C][pcf8574:023]: Is PCF8575: YES
[11:48:35][C][pcf8574:021]: PCF8574:
[11:48:35][C][pcf8574:022]: Address: 0x25
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][E][pcf8574:025]: Communication with PCF8574 failed!
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x21
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x22
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x24
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x25
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x21
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x22
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
It seems a failure of PCF8575TS chip.
Can you please confirm?
Thank you
I am having an issue with this board.
I configured ESPHome as per your instruction but one PCF8575TS (address 0x25) corresponding to outputs 17-32 is not working properly.
All other PCF8575TS are perfectly working.
I checked voltage on pin A0, A1 and A2 of PCF8575TS (according data sheet these pins are defining the address) and everything is correct (A0 3.3V, A1 GND, A2 3.3V).
ESPHome log says:
[11:48:35][C][pcf8574:021]: PCF8574:
[11:48:35][C][pcf8574:022]: Address: 0x24
[11:48:35][C][pcf8574:023]: Is PCF8575: YES
[11:48:35][C][pcf8574:021]: PCF8574:
[11:48:35][C][pcf8574:022]: Address: 0x25
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][E][pcf8574:025]: Communication with PCF8574 failed!
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x21
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x22
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x24
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x25
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x21
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
[11:48:36][C][pcf8574:021]: PCF8574:
[11:48:36][C][pcf8574:022]: Address: 0x22
[11:48:36][C][pcf8574:023]: Is PCF8575: YES
It seems a failure of PCF8575TS chip.
Can you please confirm?
Thank you