Seamless Temperature & Humidity Monitoring on Raspberry Pi with EzTemp

Step 1: Wiring the EzTemp Sensor

The EzTemp sensor communicates over the Raspberry Pi’s UART interface. Follow the pinout below to establish a reliable connection.

• RPi GND → EzTemp GND
• RPi Tx (GPIO 14) → EzTemp Rx
• RPi Rx (GPIO 15) → EzTemp Tx
• RPi 3.3 V → EzTemp 3.3 V

Notice that a Tx pin must connect to a Rx pin and vice‑versa. Once wired, the sensor is ready for use.

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Step 2: Disable the Default Serial Console

By default, Raspberry Pi reserves the UART for the serial login prompt. To free it for the EzTemp sensor, you need to disable the serial console.

Method 1 – raspi-config

sudo raspi-config

Navigate to Advanced Options > Serial and answer No to “Enable the serial console”. Reboot the Pi before proceeding.

Method 2 – rpi-serial-console Script

sudo wget https://raw.githubusercontent.com/lurch/rpi-serial-console/master/rpi-serial-console -O /usr/bin/rpi-serial-console && sudo chmod +x /usr/bin/rpi-serial-console

rpi-serial-console status   # shows current state

sudo rpi-serial-console disable  # turns the console off

sudo rpi-serial-console enable   # restores the console (if needed)

After toggling the state, reboot the Pi.

Method 3 – Manual Edit

sudo nano /boot/cmdline.txt

Remove any reference to ttyAMA0 so the line looks similar to:

dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait

Then edit /etc/inittab and comment out the line:

#T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100

Reboot the Raspberry Pi.

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Step 3: Install the Example Python Script

Download the official Python client that reads data from the EzTemp sensor:

wget https://raw.githubusercontent.com/CAIMANICS/EzTempRH-for-Raspberry-Pi/master/software/EzTempRH.py

Run the script with:

python EzTempRH.py

Typical output:

EzTemp&RH build 2
Temperature: 24.0C
Humidity:    48.0%
External:    1018 / 2048 counts
Version:     2

With the script verified, you can integrate the sensor into your own applications.

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For more detailed guidance, refer to the full “Easy Temperature and Humidity on Raspberry Pi” documentation.