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hello everyone welcome to controllers
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in this video I will show you how to
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make a corona display meter for your
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country I am using esp8266 and OLED
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display I will also demonstrate this on
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LCD 16 cross 2 let's start by creating a
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I am using stm32f4 for six r-e but you
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can use any other controller - first
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thing first I am selecting external
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crystal for the clock
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select i2c for connecting the displays
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we need to use the fast mode for OLED
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display LCD display can work in either
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mode next select the UART in
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asynchronous mode and enable the
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interrupt next the clock setup I am
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selecting external crystal which is 8
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megahertz and I want the system to run
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at 100 megahertz also I am changing
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these pins for convenience click Save to
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generate the project this is our main
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file let's see the connections first
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this is how ESP is connected to the
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controller connect rx pin to TX + TX 2
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bar X connect VCC and CH PD to the 5
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volts and ground to ground OLED is
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connected straight forward
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now we need to copy these library files
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you can get them after you download the
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code from the link in the description
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copy the C files in the source directory
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and header files in the include
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now include the functions dot H file and
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SSD one 3:06 dot H file if you are using
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any other i2c you need to update it here
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if you are using any other let's copy
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this function and we will paste it in
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the interrupt file also change the UART
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interrupt handler these are all the
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basic setup we have used in previous
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videos two functions file only have two
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functions this is to initialize the ESP
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you need to enter your Wi-Fi credentials
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here this function is to get the data
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it requires the API key
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to get it go to things be calm and
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create an account after logging into
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your account go to apps thing HTTP new
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thing HTTP give some name to this now we
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have to get data from somewhere go to
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select your country now copy this
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address and paste it in the things speak
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leave everything as it is go back to
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world Dominic a C's click inspect right
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click here copy copy XPath and paste
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string remove the span and click Save
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now let's write the main program
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initialize the OLED display print some
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data to show the status initialize the
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ESP and enter the Wi-Fi credentials
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in the while loop print some info now we
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will get the data papi the API key from
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the things speak and paste it here we
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also need to create some arrays to save
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enter the arrays to their respective
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positions and now we will print this
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this will print the total number of
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cases deaths and recovered cases let's
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build this and flash it into the board
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you can see the data being displayed to
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show that it's working properly I will
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change the country here
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you can see the data is also updated
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let's change it again
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and data is updated again I will change
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this back to my country
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if you are using LCD we need to copy the
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LCD related files into the source and
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include the i2c LCD dot H file now we
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will initialize the LCD print some
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string to display status
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initialize the esp8266
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get data from the server and print it on
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the LCD let's build and run this code
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the data is displaying
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as expected this is it for the video
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guys you can download the code from the
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link in the description be safe and have
