=== ESP32-S3 Rain Barrel System Starting ===
Core: 1, Freq: 240 MHz
Extensive logging enabled
Pin 4 set to HIGH
[   622][V][esp32-hal-uart.c:330] uartBegin(): UART2 baud(9600) Mode(800001c) rxPin(5) txPin(6)
[   641][V][esp32-hal-uart.c:416] uartBegin(): UART2 not installed. Starting installation
[   649][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)...
MODBUS TX: 02 06 00 00 00 01 48 39 (CRC)
Init Response: F0 (total: 1 bytes)
MODBUS TX: 02 03 00 02 00 01 25 F9 (CRC)
Setup complete

MODBUS RX: 02 06 00 00 00 01 48 39 (total: 8 bytes)
Unexpected response length: 8 (expected 7)

MODBUS TX: 02 03 00 02 00 01 25 F9 (CRC)
MODBUS TX: 02 03 00 02 00 01 25 F9 (CRC)
MODBUS TX: 02 03 00 02 00 01 25 F9 (CRC)
MODBUS TX: 02 03 00 02 00 01 25 F9 (CRC)