So I have been working on this Arduino project that has multiple I two C sensors and devices
I always get that why my sensor is not sending me the correct readings or my I two C L CD display or O led
is not displaying correctly, especially when I am prototyping. The missing crucial step is that you forgot to check if your microphone crawler successfully detected
your devices. I have here an E S P 32 an S S D 13760 led and I two C L CD display and A
PC F 85754 expander. You start programming, make sure that your Arduino powered micro controller should detect your I two C devices
by running this Arduino I two C scanner sketch. This would print the I QC addresses of all your I T C devices
And if you see this, then it would save you a ton of headache later
This is often a very basic thing to do that gets neglected by agreeing a new piece and later cause a lot of time figuring
out the the issue later, let us discuss more about this topic
The rest of the region. Hi
welcome to Danske Tech. You are working on an epic internet of things project and you receive an I two C sensor to our devices
Then chances are you might be excited to write code to program your device
You need to find out later that it doesn't work or it's not communicating with your Arduin code
This video will show you how to use the Arduino I two C scanner sketch and why you need it before you start programming I
two C or inter integrated circuit properly. Pronounced as Iceberg C is one of the popular communication protocols used to allow multiple
sensors to communicate with your microcontrollers. I two C uses two wires which are called the S C L or the serial clap and the
S D A or the serial data piece. Well, technically speaking, it still requires four wires as you need the ground and the BC C
pins to provide power, it can support multiple controllers or masters and multiple devices or peripheral slips
The ability to connect multiple sensors on a single bus, which is the S D A S E L combination of pins makes it ideal
for any reno powered circuits, especially if you are controlling multiple sensors or components
Because of the I two CS ability to connect multiple devices along its bus or two wires
Then the controller or the adrenal powered board needs to somehow know where to send the data
This is what an I two C address is all about. And this should be a distinct address that ranges from 0 to 1 to
seven that will uniquely identify each sensor in your clear controller. Usually manufacturers of sensors and
other I two C components have a default I to C address assigned for their sensors out of the box
The problem with I two C is that you cannot connect two sensors or devices on the same S D A or S E pin
address with the same I to C address. But fortunately these sensors have the ability to change the default I two C address as ordering
some jumper components, check your sensor data sheets on how to do this
The usual question that I often receive is how they can connect multiple I two C devices or sensors on their Arduino powered micro controllers
such as the Arduino Uno E S P 8266 or E S P 32
If you are new to Arduino programming, then you might be surprised that you only just need to connect the S D A and the
S C L combination, your sensors to the same I two C pins of your micro controller in the image above the E S P
32 S D A or S E L pins, which is the D Pr 0 21 22 are connected in parallel to all my I
to C sensors and devices as I have mentioned, this would only work if each sensors
a device has a unique I two C address. So where does the Reno I two C scanner or I I two C underscore scanner
comes into the picture. During your Arduino project development, you will definitely run across these steps
You look for the appropriate sensors or devices for your projects and then you start wiring the sensors to your Arduino powered micro controllers
Next is you will look for a suitable library to drive your sensors or devices
then create your program and then retrieve the sensor readings. Upon running your programs
You have probably run into the issue when you can retrieve any sensor readings from my sensor or why can't I display properly the messages
in my I two C L CD display or S S D 13 C 60 led
The reason is that you miss one crucial step between step B and four and I would admit that I fall into this trap
Also, I often get too excited to test my sensors and see the output that I almost forgot to check if my microcontroller detected my
sensor or devices in the I two C bus. So how do we detect if our devices is properly connected to our microcontroller
Well, you should just run the Arduino I two C scanner. It's just actually a small sketch from the Rio team that will scan all
the devices connected to your I two C bus lines. This would print the addresses of the device in hacks format that you can use
when you want to start communicating with it. Using the library of your choice below is the schematic of the sample project
that I have done in the demo where if I have connected I two C enable and source of devices
which are the L CD display, the S S D 13060 led and A PC F 85 75 GP I O part expander
module. And this is the table for you to have a better understanding regarding the violin code
It's actually just a simple sketch where you just need to upload this in your devices
it just periodically scans or look all the available addresses. So right now as you can see
it starts with one and then it starts with the 127 and then checks if there are any I two C devices connected to your
micro controller. My case here I have three. So you can see that I have three devices that is being printed here
which means that my project is now ready to be programmed. So that's really how simple and easy is this very basic Arduino I
two C scanner? But as I have mentioned, this simple sketch would solve you a type of head a later
Believe me, I've been here so many times and that's it. The writer for this project
Is available in the description of this video. I hope you learned something after exploring