OpenClaw Temperature and Humidity Acquisition Tutorial

Before starting, please complete the [01-Hardware Configuration], [02-openclaw API-KEY Configuration], [03-openclaw Model Switching], [04-AI Voice Interaction Configuration], [05-Three Dialogue Solution Configuration Tests] under the Prerequisites directory. If you are currently only using TUI / whatsapp, you can skip 04 for now. This article assumes the basic environment has been prepared and only expands on DHT-related content.

1. Tutorial Objectives

This article demonstrates OpenClaw's natural language control capabilities through the DHT temperature and humidity sensor. After completing this tutorial, readers can:

• Understand the basic approach to reading temperature and humidity with OpenClaw

• Communicate with OpenClaw through three methods: whatsapp, TUI, and voice code

• Complete four DHT cases: single reading, comfort judgment, threshold alert, OLED linked display

• Understand the complete chain from "user question" to "sensor reading" and "result feedback"

2. Hardware Preparation

• OpenClaw mainboard

• DHT temperature and humidity sensor [Default DHT11]

• [Optional] OLED display

• [Optional] Microphone module

• Wiring diagram

  

3. Software Preparation

Code entry points that will be used in the tutorial

• Low-level driver code: /home/jetson/hardware_hal_demo/

• Temperature and humidity reading command: /home/jetson/hardware_hal_demo/dht

• Temperature and humidity linked display: /home/jetson/hardware_hal_demo/dht_oled

• Voice entry: /home/jetson/voice_to_openclaw/src/main.py

The dht tool already supports the following capabilities:

• Read current temperature and humidity

• Output results in json or text format

• Use mock fake data for local debugging

dht_oled  #Display temperature and humidity data to OLED
dht #Feedback `json` results

If you want to display temperature and humidity results directly to OLED, you can also use dht_oled.

Note: If you want to write the tutorial yourself to read temperature and humidity data from the ajetson in the Python driver library, it is recommended to read DHT data at 2-second intervals, because DHT sensor itself is more suitable for 2s sampling

4. Test Temperature and Humidity Acquisition

Before starting this tutorial, please complete one openclaw tui basic dialogue self-check; if you haven't done it yet, see [05-Three Dialogue Solution Configuration Tests]. After confirming OpenClaw can respond normally, enter DHT-specific testing.

Terminal input to enter TUI:

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openclaw tui

You can try entering the following content in the terminal:

• Read current temperature and humidity

• What is the current environmental humidity

• Help me judge if the current environment is comfortable

• Remind me if the temperature is too high

5. Three Solutions for Communicating with OpenClaw

If optional AI voice module + speaker are selected, whatsapp dialogue, tui, whatsapp dialogue need to broadcast OpenClaw's reply content. You can run the following program in terminal. AI voice module dialogue does not need to run repeatedly

• Modify whether to enable broadcast parameter

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/home/jetson/voice_to_openclaw/.env

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ENABLE_TTS=true  #This parameter controls whether to broadcast. After modification and saving, run the following program in terminal

• Terminal input

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cd ~/voice_to_openclaw
source .venv/bin/activate
python -m src.openclaw_session_tts

5.1 whatsapp Solution

For whatsapp connection steps, please directly refer to [05-Three Dialogue Solution Configuration Tests]. This section only retains dialogue examples suitable for the DHT tutorial.

After creation, you can directly dialogue, for example:

• Read current temperature and humidity

• Judge if it's currently too hot

• Remind me if humidity is too low

5.2 TUI Solution

If you have completed the TUI self-check in Chapter 0, directly enter the following command in the terminal to continue the dialogue:

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openclaw tui

5.3 Voice Code Solution

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Requires optional AI voice interaction module + speaker

For voice module installation, environment configuration, and basic wake-up process, please directly refer to [04-AI Voice Interaction Configuration].

You need to say "Hi, yahboom" to wake up for dialogue.

After waking up, you can directly say control content, for example:

• What is the current temperature

• Help me read the humidity

• Tell me if it's too stuffy

6. Comprehensive Cases

Note: The following are all dialogue demonstrations using openclaw tui method. You can also choose whatsapp or voice method to complete.

6.1 Case One: Single Reading

Experimental Objective

Get current temperature and humidity once to complete the most basic environmental sampling.

Effect Description

After receiving the command, OpenClaw will call the DHT driver to read the current temperature and humidity, and return the results to the user in natural language.

Example Instructions

• Read current temperature and humidity

• What is the current indoor temperature

• Help me check the current humidity

6.2 Case Two: Comfort Judgment

Experimental Objective

Let OpenClaw make a simple judgment about the current environment after reading data.

Effect Description

Besides directly reporting numbers, OpenClaw can also roughly judge states like "too hot", "too cold", "too dry", "too stuffy" based on temperature and humidity, making results closer to natural dialogue.

Example Instructions

• Help me judge if the current environment is comfortable

• Is the current temperature and humidity suitable for long-term office work

• Give me a brief evaluation based on temperature and humidity

6.3 Case Three: Threshold Alert

Experimental Objective

Let OpenClaw give alerts when temperature or humidity exceeds the set range.

Effect Description

When temperature is too high, too low, or humidity is too high or too low, OpenClaw can directly output alert information, or link with RGB lights for more obvious feedback.

Example Instructions

• Remind me if temperature exceeds 30 degrees

• Prompt if humidity is below 40% that air is too dry

• Are there any alarm conditions now

Extensible Gameplay

• Link with RGB for red, yellow, blue three-color alerts

• Link with OLED to display alarm text

• Add buzzer for stronger alerts

6.4 Case Four: OLED Linked Display

Experimental Objective

Display the temperature and humidity results just read directly to OLED, forming a complete data display chain.

Effect Description

After completing an environmental sampling, OpenClaw can not only return results to the user, but also simultaneously write temperature and humidity to the OLED screen, forming a complete effect of "reading + display".

Example Instructions

• Read current temperature and humidity and display to OLED

• Write temperature and humidity to the screen

• Make a simple temperature and humidity display page

Extensible Gameplay

• Periodically refresh OLED content

• Make into a temperature and humidity dashboard

• Link with weather station project to form a complete application