Let's build a room sensor - Part 1 - Temperature, Humidity, and Bluetooth

Summary

This tutorial covers the basics of creating a room sensor using ESP development boards and various sensors, including Bluetooth temperature and humidity sensors (DHT22), light sensors (BH1750), and presence detectors. The video details the setup, pin configurations, and coding in ESPHome, emphasizing practical applications like gas sensors for kitchens and distance sensors for garages. The tutorial aims to build a comprehensive room sensor, with future videos adding more features and sensors. It also includes a demonstration of integrating the sensor data into Home Assistant for monitoring room conditions.

Takeaways

• 📡 The tutorial covers the basics of using a room sensor with various devices.
• 📶 You need a basic setup for devices as described in the ESP Foundation tutorial.
• 🌡️ The focus starts with Bluetooth temperature and humidity sensors, specifically using a DHT22.
• 🛠️ Additional sensors like light, CO2, TVOC, and movement detection will be added in future videos.
• 💡 The tutorial will also explore adding touch screens to control lights or open doors.
• 📋 The bill of materials includes ESP development boards (ESP32 or ESP8266), suitable USB cables, and capacitors.
• 🔧 The DHT22 sensor is preferred over the DHT11 due to better temperature and humidity range and resolution.
• 📐 Important differences between DHT11 and DHT22 include temperature range, humidity range, and sampling period.
• 📝 The video provides guidance on wiring and coding for the DHT22 sensor.
• 🔄 The tutorial uses Home Assistant and ESPHome software, detailing the setup and configuration process.

Q & A

What is the primary focus of this tutorial?

The tutorial focuses on setting up a room sensor using various sensors, including a Bluetooth temperature and humidity sensor, with the aim of creating a comprehensive room sensor system.

Which temperature and humidity sensor is being used in the tutorial?

The tutorial uses the DHT22 temperature and humidity sensor.

What additional sensors are mentioned for future videos?

Future videos will include sensors for illumination, eCO2, TVOC, movement detection using a PIR sensor, and presence detection using a millimeter wave sensor.

What are the primary differences between the DHT11 and DHT22 sensors?

The DHT11 has a temperature range of 0 to 50°C and a humidity range of 20 to 90%, with a 1% and 1°C resolution. The DHT22 has a temperature range of -40 to 80°C and a humidity range of 0 to 100%, with a 0.1% and 0.1°C resolution.

What is the purpose of the 10 microfarad capacitor mentioned in the tutorial?

The 10 microfarad capacitor makes it easier to upload firmware via the USB port.

What software is required for this project?

The required software includes Home Assistant and ESPHome.

Why is it important to check the pin assignments for each ESP model?

Pin assignments vary between different ESP models, and using the wrong pin configuration can damage the microcontroller.

What are some use cases for the sensors mentioned in the tutorial?

Use cases include detecting gas in the kitchen, using a distance sensor in the garage for parking, and monitoring room conditions such as temperature, humidity, and presence.

How does the Bluetooth proxy function in the tutorial?

The Bluetooth proxy extends the Bluetooth range of the Home Assistant machine, allowing it to communicate with Bluetooth devices beyond its direct range.

What should be considered when using the Bluetooth Low Energy Tracker Hub?

The Bluetooth Low Energy Tracker Hub is processor-intensive and can interfere with other functionalities like the web server, so it should be used sparingly and only when necessary.

What is the purpose of having unique IDs for sensors in Home Assistant?

Unique IDs allow for manipulation and changes within Home Assistant, making it easier to manage and interact with the sensors.

What are the steps to add the DHT22 sensor to the ESPHome configuration?

The steps include adding the DHT22 sensor to the GPIO pin (e.g., GPIO26), defining the sensor platform in the ESPHome configuration file, and specifying the update interval.

What additional features are planned for future tutorials?

Future tutorials will cover adding a light sensor, more presence and movement sensors, and building specific sensors for different rooms like the kitchen and garage.

What is the benefit of using i2c in sensor configurations?

Using i2c allows for flexibility and chaining of multiple sensors, making it easier to expand and customize the sensor setup.

How can the data from the sensors be displayed in Home Assistant?

Data from the sensors can be added to the Home Assistant dashboard, where it can be visualized using various types of cards, such as temperature and humidity gauges.

Outlines

00:00

🏠 Introduction to Home Automation Sensor Tutorial

This paragraph introduces a home automation tutorial series by Automator South Africa. It covers the basics of setting up a room sensor using various devices, starting with a Bluetooth temperature and humidity sensor, specifically the DHT22. The tutorial will expand to include additional sensors like eCO2, TVOC, movement detection, and potentially a touchscreen for control. The presenter intends to create a comprehensive room sensor setup that viewers can customize. They also invite viewer suggestions for additional sensors and remind viewers to engage with the content through likes, subscriptions, and comments.

05:00

🔍 Exploring Sensor Capabilities and Differences

The second paragraph delves into the specifics of the temperature and humidity sensors, contrasting the DHT11 with the DHT22. It highlights the broader temperature and humidity range of the DHT22, as well as its higher resolution and slower sampling rate. The paragraph also emphasizes the importance of consulting pin assignment diagrams for different microcontrollers and discusses the differences between the DHT11 and DHT22 in terms of sensitivity and range. The presenter plans to replace the DHT sensors with a BME280 and SHT40 to demonstrate I2C capabilities.

10:03

🛠️ Setting Up the DHT22 Sensor with ESP Home

This paragraph describes the process of setting up the DHT22 sensor with ESP Home. It covers the pinout connections required for the sensor, including VCC, data, and ground. The presenter discusses the use of a 10 microfarad capacitor to facilitate firmware updates via USB and the choice of GPIO26 for the data pin. The paragraph also includes a brief mention of coding in ESP Home, with an emphasis on the importance of using the correct documentation for the microcontroller being used.

15:06

📡 Discussing Bluetooth Integration in Home Assistant

The fourth paragraph focuses on the integration of Bluetooth in Home Assistant. It explains the functionality of the Bluetooth proxy and Bluetooth Low Energy (BLE) tracker hub, including their roles in extending Bluetooth range and tracking devices. The presenter warns about the intensive processor usage of the BLE tracker hub and advises against its use unless necessary. The paragraph also touches on the use of the proxy for monitoring devices like the Mopa Pro gas bottle fill monitor and the importance of using the web server for debugging and additional functionalities.

20:08

🌡️ Adding the DHT22 to ESP Home and Testing

In this paragraph, the presenter adds the DHT22 sensor integration to the ESP Home configuration. They provide a code snippet for the DHT platform, specifying the GPIO pin, sensor name, and model. The update interval for the sensor is set to 30 seconds. The presenter then demonstrates an Over-The-Air (OTA) update of the ESP32 device and confirms that the sensor is functioning correctly by displaying the temperature and humidity readings in Home Assistant.

25:11

📊 Creating a Dashboard for Sensor Data

The final paragraph discusses the creation of a dashboard in Home Assistant to display sensor data. The presenter demonstrates how to add cards for room temperature and humidity to the dashboard, using the data from the DHT22 sensor. They provide a step-by-step guide on configuring the cards, including setting the minimum and maximum values and choosing the display format. The paragraph concludes with a preview of the dashboard and a reminder that future tutorials will cover additional sensors and functionalities.

Keywords

💡ESP32

The ESP32 is a powerful and versatile microcontroller with integrated Wi-Fi and Bluetooth capabilities. In the video, it serves as the main development board for building various sensors and devices for a smart home setup. The tutorial uses the ESP32 to connect and control different sensors, highlighting its importance in the project's foundation.

💡DHT22

The DHT22 is a temperature and humidity sensor. The video uses this sensor to measure environmental conditions within a room. It is chosen for its wide temperature range (-40 to 80°C) and humidity range (0 to 100%), providing accurate and reliable data for home automation systems.

💡Home Assistant

Home Assistant is an open-source home automation platform. In the tutorial, it serves as the software backbone for integrating and managing the various sensors connected to the ESP32. The use of Home Assistant allows for centralized control and monitoring of the smart home setup.

💡Bluetooth Proxy

A Bluetooth proxy extends the Bluetooth capabilities of the Home Assistant server beyond its typical range. The video explains how to use the ESP32 as a Bluetooth proxy to connect remote Bluetooth devices to the home automation system, enhancing the system's reach and functionality.

💡BME280

The BME280 is another sensor module used for measuring temperature, humidity, and pressure. The video mentions it as an alternative to the DHT22, demonstrating the flexibility of the system to incorporate different sensors based on availability and requirements.

💡I2C

I2C (Inter-Integrated Circuit) is a communication protocol used to connect low-speed devices to microcontrollers. The video discusses the advantages of using I2C, such as the ability to chain multiple sensors together, making it a preferred method for expanding the sensor network in the home automation project.

💡Pin Assignments

Pin assignments refer to the specific pins on a microcontroller used to connect external devices. The video emphasizes the importance of correct pin assignments for different sensors and modules, as incorrect connections can lead to device malfunctions or damage.

💡ESPHome

ESPHome is a system for controlling ESP8266/ESP32 boards by simple yet powerful configuration files and control them remotely through Home Assistant or other platforms. The video uses ESPHome to write and upload the firmware needed to run the sensors on the ESP32, streamlining the setup process.

💡Capacitor

A capacitor is an electronic component that stores and releases electrical energy. In the video, a 10 microfarad capacitor is used to stabilize the power supply to the ESP32, ensuring reliable firmware uploads and preventing reset issues during operation.

💡PIR Sensor

A PIR (Passive Infrared) sensor detects motion by measuring changes in infrared radiation. The video plans to add a PIR sensor for movement detection, enabling the home automation system to respond to the presence of people in a room, such as turning on lights or triggering alarms.

💡Dashboard

A dashboard in the context of the video is a user interface for monitoring and controlling the home automation system. The tutorial shows how to add sensor data to the Home Assistant dashboard, providing a visual representation of the environmental conditions and allowing for easy interaction with the system.

💡Humidity Range

Humidity range refers to the range of humidity levels that a sensor can accurately measure. The video compares the DHT11 and DHT22, noting that the DHT22 has a broader humidity range (0 to 100%) compared to the DHT11 (20 to 90%), making the DHT22 more suitable for a wider range of applications.

Highlights

Introduction to Home Automator South Africa tutorial covering the basics of a room sensor setup.

Explanation of Bluetooth temperature and humidity sensors, specifically the DHT22.

Outline of additional sensors to be covered in future videos: illumination, eco2, TVOC, and movement detection using a PIR sensor.

Plans to add a screen and touch functionality to switch on lights or open doors.

Customization of sensors for specific rooms, like gas sensors for the kitchen and distance sensors for the garage.

Detailed list of materials needed: ESP development board, suitable USB cable, 10 microfarad capacitor, breadboard, jumper wires, and DHT22 sensor.

Explanation of the differences between DHT11 and DHT22 sensors in terms of temperature range, humidity range, and resolution.

Importance of correct pin assignments for different ESP boards and how to find manufacturer pinout diagrams.

Steps to prepare the breadboard and wiring for the DHT22 sensor.

Introduction to YAML coding in ESPHome for setting up the DHT22 sensor.

Explanation of Bluetooth proxy and Bluetooth low energy tracker hub functionalities in Home Assistant.

Compilation and installation process of the ESP32 with the new YAML code.

Verification of the DHT22 sensor data in Home Assistant dashboard, showing temperature and humidity readings.

Plan to add a light sensor in the next tutorial and details about future quick tutorial videos.

Reminder to like, subscribe, and hit the notification bell for more tutorials.

Transcripts

[Music]

hello hello hello and welcome to a home

automator South Africa tutorial today

will be covering the basics of a room

sensor to be able to successfully

complete this tutorial you will need the

basic setup for all devices my ESP

Foundation tutorial today we will start

with the Bluetooth temperature and

humidity sensors now the temperature and

humidity sensor is the same device uh

it's going to be in my case a

dht22 I will talk about it a little bit

more a little later on in this video

after that we'll be adding some more

sensors

elimination

eco2

tvoc movement DET detection using using

a p sensor presence

detection with a millimet wave

sensor we might add a screen

and if I have time touch to the screen

to be able to switch on lights or uh

open doors something like that I will

add all of these sensors over the coming

videos I don't know when these videos

are going to come out but I am going to

try to make them as regular as I can at

the end of the project I intend to have

a full room sensor that works for all of

us you can subtract from it you can add

from it but also what I will be doing is

at the very end of this is add some

specific for example in the kitchen you

may need a gas sensor for either natural

gas or

LPG and we will work on building such a

sensor for the kitchen in the garage you

might want to have a distance sensor for

when you park we will then build one of

those as well so all of this is in the

planning and there will be others I'm

sure if you have any ideas of what we

could do for room sensor please don't

hesitate put it in the comments below I

read all of my comments I reply to all

of my comments

a little self- serving reminder don't

forget to like subscribe and hit that

notification Bell also all of my

tutorials have time codes or chapters

attached to them

below before we start building I'd like

to give you the bill of

material we we're going to start with

the ESP development board mine is an ESP

32s board but any ESP

8266 or 32 will work you might have to

readjust some of the pins a suitable USB

cable in my case my USB cable is a micro

USB a 10 microfarad capacitor now this

is not required but it makes it easier

to dump the firmware using the USB port

and I'll explain to you later why a

brakeboard some bre brakeboard jumper

wires you shap breadboard jumper wires

this is an

option this is optional but it will make

your life much easier easier I

promise and obviously either a DHT 11 or

22 temperature and humidity sensor

module you can use a

dhd1 I will be using a dht22 and I will

explain to you why later in the coming

videos we will also

add a

bh1750 light

sensor and we will talk about the

advantages of using i squ c or

i2c

then we'll add a gp3 a

quality s sensor

module uh this sensor module is the only

one that I could find in South Africa at

the time of recording there are IDs they

all work pretty much the same so if I do

this one you'll know how to do the

rest a p sensor for movement

detection then we will talk talk a bit

about universal asynchronous receiver

transmitter or

art and the protocol behind it and then

we'll add an LD

2410 C presence radar sensor that is a

tricky one so it might be longer than

the

rest um and at the end I will replace a

DHT 11 or 22 with a BME

280 and an sht 40 just to show you what

we can do with

i2c um i2c allows us quite a lot of

flexibility and chaining of

sensors software wise the requirements

are very simple we need home assistant

and we need espo that is it nothing

else so instead of carrying on and

talking about things how about we start

building before we carry on I'd like to

talk quickly about something that's

relatively

important for each device that we are

going to use be it an ESP 32 32s 32 S2

C3 or an

esp8266 there are pin assignments to

them and these are usually done for

manufacturer for example an ESP 32 cam

will not have exactly the same pin

assignments as a ESP 32 D1 mini and the

D1 mini would not have the same pin

locations as another esp32 to to find

which pins you have for the given ESP or

any other microcontroller you will have

to find the manufacturer pin out diagram

and this is what we have in front of us

the binard

diagram this is the one that I use which

is the espb

32s from from AI thinker this is the uh

the the board uh that we are going to be

using right through and that we have

already been using in previous tutorials

I will leave a link below with the

address of where you can get this

diagram and a little bit more about this

specific node

MCU today we will be using GP

io26 which the arrow is pointing out

right now okay I think this was uh

something that was very important you do

need to get the documentation for your

MCU and not all mcus have the same pin

diagrams I got CAU out thinking that uh

the node MCU and another MCU had the

same pin assignment at the same place

this is a good way to blow up one of

your

microcontrollers before we continue I'd

like to speak about the differences in

between the DHT l and the

dht22 although you can use either of

them there are major differences to them

not in the wiring but in their

sensitivity and in their range so to

give you a fair idea of what the

differences are the temperature range of

the DHT 11 is from 0 to 50°

C whereas the DHD 22 is from - 40 to 80°

C the humidity range for the DHD 11 is

in between 20 and 90% whereas the TW DHD

22 ranges from 0 to

100% additionally there are some

resolution changes between the

two for the humidity and temperature the

DHT 11 has a 1% one degree

step whereas the

dht22 has a 0.1% step on

both lastly and possibly not as

important but worth

remembering is the sampling

period the dht11 can sample at one time

a second whereas the

dht22 two seconds to refresh so you

cannot request the data from the

dht22 faster than that now the ESP home

libraries takes care of all of this so

you don't have to worry too much about

it I just wanted to make sure that you

understood the differences between the

two now in this project you can use

either and the pin outs are exactly the

same so let's move on to that

the first pinout I'm going to talk about

is the VCC or power

pinout for the

dht22 the power can be in between 3.5

volts and 5.5

volts the second one is going to be the

data now we are getting serial data out

of this it is a digital

output so we do not need an analog pin

and the is reason why I chose

gp26 the last pin is ground obviously

it's going to go back to the ground now

you're going to see all of this in more

details shortly when I show you how to

wire

it as you can see I have prepared the

brakeboard with uh all we need uh you

can see the dht22 this white little uh

block over there so let me just explain

to you what I've

done I have hooked up the

VCC to the positive

rail the ground to the negative rail

these rails run this

way uh whereas these rails run this way

okay so the next one that I need to talk

to you about is the 10 microfarad

uh capacitor which is only there so that

we can actually use the serial

in without having to push any of the

button particularly this button over

here the data the serial data from the

dht22 as you can see comes into GPO

26 let's go and do some code and see if

all of this

works

here we are we are ready to do some yaml

code in ESP home but before we do some

things that I wanted to point out the

first thing is that our version

of Home assistant is now 20

24.

3.0 and the second one is that our ESP

home version is currently 20 24.2 do2

both of them have changed during the

time that I Was preparing for this

recording and uh I thought I would tell

you where I am now so that we are on the

same

footing okay so we can go straight to

spom and I would like to show you a

little something I'm going to go into

our last tutorial regarding SP home and

I am going to scroll all the way down

and you will see here we have 202 lines

why have I done that well I want to show

you this one now this is a brand new

device I primed it like I primed the

original one that I did in my first

tutorial where I show you how I prepare

my ESP home

devices and you will see that this

device

also has

202 lines and that's because both of

them are using exactly the same code at

the exception of what is in the

substitution variables I have just

change the name and put a new IP address

we can move on and start doing some

code the first thing that I'm going to

do is I'm going to go just under the

Wi-Fi and this is because I like to have

some order Wi-Fi is a communication

system and so it's Bluetooth so I am

going to put bluetooth under Wi-Fi I

have this prepared and it is in in

another the screen so I'm going to copy

the code here and I am going to paste it

right for

you

um I know that caching will give us some

problems and I also know that

um

my code is not quite correct so I'm

going to go and fetch this device

internal

name and I am going to change the device

name to device internal name why does

the cach service doesn't work well the

cach service is a ESP IDF function just

so that I explain to you there are two

ways of compiling

there is the Arduino framework or the

ESP IDF framework oddly enough as I

think I explained in the previous one

the Arduino FR framework for

esp32 actually leverages entirely from

the ESP IDF framework now let's go

through Bluetooth I am going to just

scroll it a bit up so that we can all

see it here we are uh the Bluetooth

proxy as you know very well know extends

the home assistant machine's Bluetooth

abilities Beyond its range so wherever

you're proxy it plays the game of

switching from the BL whatever the

Bluetooth signal is on the one side and

outside of the range of the home

assistant machine and it forwards that

to the home assistant machine

or the other way around so it's

basically like having a long cable with

a Bluetooth dongle at the end to extend

the range of Bluetooth that is all well

and fine and it's not a problem the next

one is the Bluetooth low energy tracker

Hub the Bluetooth low energy tracker Hub

is very intensive on the

processor so we need to use this

sparingly in fact I would even

discourage you from using it unless you

know exactly that you're going to need

it in that

position and that's because you lose the

ability to do other things uh web server

being one of

them the uh tracker and the web server

at the same time do not work I have

tried on many occasions and I end up

with a microprocessor that just reboots

and reboots and boots or boots randomly

for no reason whatsoever if you are

going to have a Bluetooth device or many

Bluetooth device in a room sure use it

if you're not going to have any

Bluetooth device in that room comment it

out rather have the web server it's far

more useful and I think I explained why

it is useful it allows us to debug but

beyond all of that it also allows

further things

which I will talk about in one of my

quickies it is related to the way that

we can connect an ESP 32 ESP home device

to a new network so the Bluetooth proxy

is active equals true means exactly what

it says here it is I'm a proxy I'm

active use me the Bluetooth low energy

tracker Hub at

okay fine I'm going to scan for stuff

that I can track that announces itself

and uh I'm going to do that at every

1,100 milliseconds or 1.1 second why

would that be useful I have a mo M Pro

Bluetooth device which allows me to

monitor my guas bottle fill so I know

when I get too low

about 10% it actually sends out an alert

to me through home assistant it is a

Bluetooth device and it is outside of

the range of my home assistant server I

use it there I also use the same uh

esp32 to monitor any gas leak around the

bottle there is a good case for that I

am going to stop about Bluetooth at this

point in time we will treat Bluetooth

device is in more details especially I

think the the mopa pro and I'm hoping

I've got the name right because it is an

interesting device I am going to compile

and install this so let's go to install

and because it's been primed with my

code already I know that it has Wireless

ability a few moments

later we are waiting for the esp32 to

respond and there we are

it is responding I would like to show

you that the blle is indeed installed

and you can see it right

there and

uh there we are we are now reading data

from our

ESP now let's talk about adding the

dht22 I think that we I've covered the

dht22 in uh enough details previously so

all I'm going to do is add the code and

explain to you what the code does I am

going to go down and uh go all the way

down to my sensors uh area there it is

sensors sensors area I am going to do

some space for

us and uh go back a little bit and just

paste my code so so here is the code I

like meat code so I will do this okay so

the platform is

DHT

the gpio that we opted for is a GPO

26 and I chose that one for a good

reason and I will be honest with you I

can't remember why then after that it's

simply temperature and as you see name

temperature

ID and humidity name humidity and an ID

now I have a tendency to put IDs to

everything and that's because in home

assistant if you've got an ID you can

actually do some manipulation and

changes inside of Home assistant uh that

you can't do if you're not if you do not

have a unique

ID okay the model is a

dht22 yes if you use a DHT 11 it would

be dht11

and

lastly update interval is the update

interval that I set at the top of the

file now just to show you what that

update interval is set at right now it

is 30 seconds okay let's go back over

there and this is everything we need to

do just to get a dht22 to work I will be

honest with you I'm going to cross

fingers and touch wood and hope that it

works as I said the esp32 is primed and

we can do an

OT and ply and here we go it's going to

be much faster than the last one now the

last one took a little bit of

time uh it had to download certain

things and it had to do a few other

things like compile everything this time

we only compiling two

so it should be pretty

fast there we are and it is uploading it

a few moments

later now we are waiting for the device

to respond back after

reboot and here we

are okay I am going to scroll down a

little bit so that you can see where the

DH T is being

initialized and we're going to go down

and we are starting to get data so I

must of pray to the right computer

guards and we are getting actually 20

28.1 Dees and

40.3% humidity which is highly likely we

have a storm outside and uh it is

raining and uh the temperatures right

now are very high okay and yes it is 1

p.m. that covers everything I wanted to

show you inside of ESP home so I am just

going to go stop I am going to CL

close and our device is indeed online

and I get a notification a new device

has been

discovered I am going to dismiss it

because I do these things I'm going to

go to settings device and

services and you you are going to see oh

I was talking about the mo mopa check

and it is available to me right here

right now and through that uh Bluetooth

proxy uh it is a Bluetooth one it is

sitting on the other side of the room of

the wall so obviously it will pick it up

the one that it did not pick up is the

ESP home device that I want us to use I

see why I Prime the ESP Home Room sensor

device previously so we're going to go

into it and as you can see the humidity

is appearing the temperature is

appearing and all of the other things

that we have set up is appearing so how

do we go about putting that into the

dashbo I'm not going to go into funny

things today um I will have a separate

video regarding how to build a dashboard

with yl I know there are new function

ities drag and drop that was introduced

in this version of Home assistant I'm

still a bit old style I like the control

that I have when I do things by code but

just to demonstrate how well all of this

works we are going to just go add to

dashboard and this is what it will look

like and we are going to just add it to

the

dashboard if we come back to overview

here we are the this is the data that we

have right now we do not have any fancy

I don't think we've got anything fancy

that we can do with it a little longer

than a few minutes

later here we've got a we've got one um

and uh right now that's a signal sensor

but what we want is let's use the temp

oops let let's use the

temperature the the temperature the room

temperature sensor and and the units and

everything else is good we are going to

put a

Time ah if I could spell

temp right

here and I guess we should say GR in

front uh the unit is um degrees

Centigrade we're not going to change

there the minimum um I'm not going to

change the maximum uh let's let's put

the minimum at zero because it's a room

temperature and the maximum we are going

to put at 40 what do you think so we can

display it as a

needle go as a needle gauge I don't like

that severity no that's fine okay so we

are going to save that and we are now

with a room temperature of

22. oh

28.2 uh to I wonder if no it's not there

yet okay and we can add another card

same one if I can find it again here he

is and we are going to take this and we

are going to say humidity and humidity

obviously

humity and as I was about to say

humidity starts at zero and the maximum

is 100 and we're going to save that and

now we have both room temperature and

room humidity available to us on the

dashboard I am going to wrap off for

today and the next one I will be adding

a light sensor and it is going to be a

quicker in fact the next few are

probably going to be all quickies until

I do presentence and U movement which I

will possibly do at in in one single

tutorial anyway I think we've covered

this very well if you liked the video

obviously please do not hesitate to

click the like button if you want more

of these hit that subscribe button and

if you want to be notified hit that Bell

icon this is Pascal signing off until

the next tutorial have a great

[Music]

one