Solax X1 Boost [Modbus CRC Check failed!]

[Aodio]

hi I am trying to read out my Solax X1 Boost inverter. Unfortunately I always get the message "Modbus CRC Check failed! Does anyone have any ideas?
I have used the "esp32-solax-x1-boost.yaml"

[syssi]

Could you provide some logs with debug output enabled:

logger:
  level: DEBUG

uart:
  id: uart0
  baud_rate: 9600
  tx_pin: GPIO4
  rx_pin: GPIO5
  debug:
    direction: BOTH

[Aodio]

[11:40:36][D][uart_debug:114]: >>> 01:04:04:23:00:01:C1:30
[11:40:36][D][uart_debug:114]: >>> 01:04:04:23:00:01:C1:30
[11:40:36][D][uart_debug:114]: >>> 01:04:04:23:00:01:C1:30
[11:40:36][D][uart_debug:114]: >>> 01:04:04:23:00:01:C1:30
[11:40:37][D][uart_debug:114]: >>> 01:04:04:23:00:01:C1:30
[11:40:37][D][modbus_controller:032]: Modbus command to device=1 register=0x423 countdown=0 no response received - removed from send queue
[11:40:37][D][uart_debug:114]: >>> 01:04:04:25:00:01:21:31
[11:40:37][D][uart_debug:114]: >>> 01:04:04:25:00:01:21:31
[11:40:37][D][uart_debug:114]: >>> 01:04:04:25:00:01:21:31
[11:40:38][D][uart_debug:114]: >>> 01:04:04:25:00:01:21:31
[11:40:38][W][modbus:108]: Modbus CRC Check failed! 1A12!=7F0F
[11:40:38][D][uart_debug:114]: <<< DE:F9:BF:0F:7F:DF:5F:DE:F9:BF:0F:7F:DF:5F:DE:F9:BF:0F:7F:DF:5F:DE:F9:BF:0F:7F:DF:DF:DD:FB:9F:01:7F:DF:DF:DD:FB:9F:01:7F:DF:DF:DD:FB:9F:01:7F:DF:DF:DD:FB:9F:01:7F:DF:DF:DD:FB:9F:01:7F:DF:5F:FB:FD:7D:06:7F:DF:5F:FB:FD:7D:06:7F:DF:5F:FB:FD:7D:06:7F:DF:5F:FB:FD:7D:06:7F:DF:5F:FB:FD:7D:06:7F:DF:5F:DB:FD:BD:9D:00:7F:DF:5F:DB:FD:BD:9D:00:7F:DF:5F:DB:FD:BD:9D:00:7F
[11:40:38][D][uart_debug:114]: >>> 01:04:04:25:00:01:21:31
[11:40:38][D][modbus_controller:032]: Modbus command to device=1 register=0x425 countdown=0 no response received - removed from send queue
[11:40:44][D][uart_debug:114]: >>> 01:04:04:00:00:05:31:39
[11:40:44][D][uart_debug:114]: >>> 01:04:04:00:00:05:31:39
[11:40:44][D][uart_debug:114]: >>> 01:04:04:00:00:05:31:39
[11:40:45][D][uart_debug:114]: >>> 01:04:04:00:00:05:31:39
[11:40:45][D][uart_debug:114]: >>> 01:04:04:00:00:05:31:39
[11:40:45][D][modbus_controller:032]: Modbus command to device=1 register=0x400 countdown=0 no response received - removed from send queue
[11:40:45][D][uart_debug:114]: >>> 01:04:04:07:00:01:81:3B
[11:40:45][D][uart_debug:114]: >>> 01:04:04:07:00:01:81:3B
[11:40:46][D][uart_debug:114]: >>> 01:04:04:07:00:01:81:3B
[11:40:46][D][uart_debug:114]: >>> 01:04:04:07:00:01:81:3B
[11:40:46][D][uart_debug:114]: >>> 01:04:04:07:00:01:81:3B
[11:40:46][D][modbus_controller:032]: Modbus command to device=1 register=0x407 countdown=0 no response received - removed from send queue
[11:40:46][D][uart_debug:114]: >>> 01:04:04:0A:00:01:10:F8
[11:40:47][D][uart_debug:114]: >>> 01:04:04:0A:00:01:10:F8
[11:40:47][D][uart_debug:114]: >>> 01:04:04:0A:00:01:10:F8
[11:40:47][D][uart_debug:114]: >>> 01:04:04:0A:00:01:10:F8
[11:40:47][D][uart_debug:114]: >>> 01:04:04:0A:00:01:10:F8
[11:40:48][D][uart_debug:114]: <<< DF:5F:DB:FD:BD:9D:00:7F:DF:5F:DB:FD:BD:9D:00:7F:DF:DF:FF:F5:9D:8D:00:7F:DF:DF:FF:F5:9D:8D:00:7F:DF:DF:FF:F5:9D:8D:00:7F:DF:DF:FF:F5:9D:8D:00:7F:DF:DF:FF:F5:9D:8D:00:7F:DF:5F:FF:FD:FD:62:7F:DF:5F:FF:FD:FD:62:7F:DF:5F:FF:FD:FD:62:7F:DF:5F:FF:FD:FD:62:7F:DF:5F:FF:FD:FD:62:7F:DF:DF:EF:FD:DF:0F:7F:DF:DF:EF:FD:DF:0F:7F:DF:DF:EF:FD:DF:0F:7F:DF:DF:EF:FD:DF:0F:7F:DF
[11:40:48][D][modbus_controller:032]: Modbus command to device=1 register=0x40A countdown=0 no response received - removed from send queue
[11:40:48][D][uart_debug:114]: >>> 01:04:04:0D:00:03:20:F8
[11:40:48][D][uart_debug:114]: >>> 01:04:04:0D:00:03:20:F8

[syssi]

Please double check your wiring, the baud rate, make sure ModbusRTU is enabled and a Modbus address is set. The RX traffic is just garbage and doesn't look like Modbus frames at the moment.

[Aodio]

You are absolutely right, it was the wiring. Through a lot of trial and error, I overlooked checking this again. Thank you very much and with this you have published a cool and working project.