[   102][I][esp32-hal-i2c.c:75] i2cInit(): Initialising I2C Mast

=== ESP32-S3 Rain Barrel System Starting ===

Core: 1, Freq: 240 MHz
Debug level: 5
Pin 4 set to HIGH
I2C scan on SDA=15, SCL=7
I2C device found at 0x20
I2C device found at 0x21
I2C scan complete: 2 device(s) found
PCF8574 at 0x21 set with P7 low and P0-P6 high
Pin 17 set to LOW
[   637][V][esp32-hal-uart.c:416] uartBegin(): UART2 not installed. Starting installation

[   645][V][esp32-hal-uart.c:467] uartBegin(): UART2 initialization done.

MODBUS RS485 initialized: RXD=pin5, TXD=pin6, Baud=9600
Sending init command (FC06 Write Single Register)...

Init Response: C0 (total: 1 bytes)
MODBUS TX: 01 03 00 04 00 01 C5 CB (CRC)
Setup complete


[  1352][W][Wire.cpp:301] begin(): Bus already started in Master Mode.