Humidity sensor- xiaomi mijia?

[blr_p]

@blr_p Nice find. Will try it out once I get the mi sensors delivered. In that pic you posted, is that a plastic takeaway container (like those swiggy ones?)

If the lid closes tightly, I think it will be ok.

are they airtight enough?

You can use a ziplock bag too.

 

[Heisen]

Might try hooking that SHT35 to a raspberrypi or something later if I get time, btw have you used it?

I have not, but I have used few cheap ones. Yes you can connect to raspberrypi over i2c protocol. Only 4 wires will be needed.

Sensor Pin	Connect to Raspberry Pi
VCC	3.3V (Pin 1)
GND	GND (Pin 6)
SDA	GPIO 2 (Pin 3)
SCL	GPIO 3 (Pin 5)

Enable I²C on Raspberry Pi​

1. Run sudo raspi-config
2. Navigate to: Interface Options → I2C → Enable
3. Reboot if prompted
4. Verify with: i2cdetect -y 1

You should see an entry like 0x44 (default I²C address of SHT35).

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Example Code (Python)

You can use the Adafruit CircuitPython library. (works for SHT31, SHT35, etc.)

pip install adafruit-circuitpython-sht31d

import time
import board
import adafruit_sht31d

i2c = board.I2C()  # uses board.SCL and board.SDA
sensor = adafruit_sht31d.SHT31D(i2c)

while True:
    print(f"Temperature: {sensor.temperature:.2f} °C")
    print(f"Humidity: {sensor.relative_humidity:.2f} %")
    time.sleep(1)