sht35_driver/
├── sht35.py           # SHT35 核心驱动文件
├── main.py            # 测试示例程序
├── sht35Example.py    # 原始示例文件（参考用）
└── README.md          # 说明文档

from machine import Pin, I2C
from time import sleep, sleep_ms
import time
from sht35 import (
    SHT35,
    SHT35_DEFAULT_ADDR,
    REPEATABILITY_HIGH,
    REPEATABILITY_MEDIUM,
    REPEATABILITY_LOW,
)

# I2C 引脚配置（请根据实际接线修改）
I2C_SCL_PIN = 5
I2C_SDA_PIN = 4
I2C_FREQ = 400000
I2C_ID = 0

# 设备 I2C 目标地址
DEVICE_ADDR = SHT35_DEFAULT_ADDR  # 0x44

# 打印间隔（ms）
PRINT_INTERVAL_MS = 2000


def print_raw_data(sensor):
    temp_ticks, humi_ticks = sensor.read_raw()
    print("Raw ticks - Temperature: %d, Humidity: %d" % (temp_ticks, humi_ticks))


def test_boundary_params(sensor):
    print("=== Boundary Test: Repeatability Levels ===")
    level_names = {
        REPEATABILITY_HIGH: "HIGH",
        REPEATABILITY_MEDIUM: "MEDIUM",
        REPEATABILITY_LOW: "LOW",
    }
    for level in (REPEATABILITY_HIGH, REPEATABILITY_MEDIUM, REPEATABILITY_LOW):
        temp, humi = sensor.measure(repeatability=level)
        print("  %s: T=%.2f C, H=%.2f %%RH" % (level_names[level], temp, humi))
        sleep_ms(100)


def test_fahrenheit(sensor):
    temp_f, humi = sensor.measure(celsius=False)
    print("Fahrenheit: T=%.2f F, H=%.2f %%RH" % (temp_f, humi))


def test_exception_params(sensor):
    print("=== Exception Test: Invalid Repeatability ===")
    try:
        sensor.measure(repeatability=99)
        print("  FAIL: Expected ValueError was not raised")
    except ValueError as e:
        print("  PASS: Caught expected ValueError: %s" % str(e))

    print("=== Exception Test: Invalid Clock Stretch ===")
    try:
        sensor.read_raw(repeatability=99)
        print("  FAIL: Expected ValueError was not raised")
    except ValueError as e:
        print("  PASS: Caught expected ValueError: %s" % str(e))


def test_status_functions(sensor):
    print("=== Status & Heater Test ===")
    status = sensor.read_status()
    print("  Status register: 0x%04X" % status)
    sensor.clear_status()
    print("  Status cleared")
    sensor.heater(True)
    print("  Heater ON (wait 500ms)")
    sleep_ms(500)
    temp, humi = sensor.measure()
    print("  Heater ON  -> T=%.2f C, H=%.2f %%RH" % (temp, humi))
    sensor.heater(False)
    print("  Heater OFF")
    sensor.reset()
    print("  Sensor reset complete")


def test_clock_stretch(sensor):
    print("=== Clock Stretch Test ===")
    temp, humi = sensor.measure(clock_stretch=True)
    print("  Clock stretch: T=%.2f C, H=%.2f %%RH" % (temp, humi))


print("FreakStudio: Testing SHT35 temperature and humidity sensor driver")

sleep(3)

i2c = I2C(I2C_ID, scl=Pin(I2C_SCL_PIN), sda=Pin(I2C_SDA_PIN), freq=I2C_FREQ)
print("I2C initialized: scl=Pin(%d), sda=Pin(%d), freq=%dHz" % (I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ))

print("Scanning I2C bus...")
devices = i2c.scan()
if not devices:
    raise RuntimeError("No I2C device found on bus")
print("Found %d device(s): %s" % (len(devices), str([hex(d) for d in devices])))

if DEVICE_ADDR not in devices:
    raise RuntimeError("SHT35 not found at address 0x%02X" % DEVICE_ADDR)

sensor = SHT35(i2c, addr=DEVICE_ADDR, debug=False)

print("Verifying device identity...")
try:
    status = sensor.read_status()
    print("Device verified at 0x%02X, status=0x%04X" % (DEVICE_ADDR, status))
except RuntimeError as e:
    print("WARNING: Status read failed: %s" % str(e))
    print("Device may still work - proceeding with test")

last_print_time = time.ticks_ms()

try:
    while True:
        current_time = time.ticks_ms()
        if time.ticks_diff(current_time, last_print_time) >= PRINT_INTERVAL_MS:
            temperature, humidity = sensor.measure()
            print("Temperature: %.2f C, Humidity: %.2f %%RH" % (temperature, humidity))
            last_print_time = current_time

        sleep_ms(100)

except KeyboardInterrupt:
    print("Program interrupted by user")
except OSError as e:
    print("Hardware communication error: %s" % str(e))
except Exception as e:
    print("Unknown error: %s" % str(e))
finally:
    print("Cleaning up resources...")
    sensor.deinit()
    del sensor
    print("Program exited")

from machine import I2C, Pin
from sht35 import SHT35

i2c = I2C(0, scl=Pin(5), sda=Pin(4), freq=400000)
sensor = SHT35(i2c)

temperature, humidity = sensor.measure()
print("Temperature: %.2f C, Humidity: %.2f %%RH" % (temperature, humidity))