#!/usr/bin/env python3
import smbus2
import time

# I2C settings
I2C_BUS = 1 # Change if needed (check with i2cdetect -l)
DEVICE_ADDR = 0x28 # Change if your DS1841 is at a different address

# Register addresses (Check DS1841 datasheet)
WIPER_REG = 0x00 # Wiper register (R/W)
STATUS_REG = 0x02 # Status register (R)
TEMP_REG = 0x05 # Temperature sensor register (R)

# Initialize I2C bus
bus = smbus2.SMBus(I2C_BUS)

def read_register(register):
"""Read a byte from the given register."""
return bus.read_byte_data(DEVICE_ADDR, register)

def write_register(register, value):
"""Write a byte to the given register."""
bus.write_byte_data(DEVICE_ADDR, register, value)

def get_wiper_position():
"""Reads the current wiper position."""
return read_register(WIPER_REG)

def set_wiper_position(value):
"""Sets the wiper position (0-255)."""
if 0 <= value <= 255:
write_register(WIPER_REG, value)
print(f"Wiper set to {value}")
else:
print("Error: Wiper value out of range (0-255)")

def get_temperature():
"""Reads the onboard temperature sensor (if available)."""
temp_raw = read_register(TEMP_REG)
return temp_raw # Might need conversion if using signed value

# Example Usage
if __name__ == "__main__":
try:
print("Current Wiper Position:", get_wiper_position())
set_wiper_position(100)
print("Updated Wiper Position:", get_wiper_position())

# Optional: Read temperature if available
temp = get_temperature()
print(f"Temperature Sensor Value: {temp}")

except Exception as e:
print(f"Error: {e}")
finally:
bus.close()