Basics of UART Communication | UART Frame Structure | RS 232 Basics | Part1

[@hemanth_loky]

People get enough information in a short span of time, after watching your videos. Really useful. Thanx a lot. You're really great! Love from chennai. :) ♥

[@FoolishEngineer]

Thank you so much for watching!! Please don't forget to subscribe to our channel

[@shantanunigam8094]

Really a nice video about the basics of UART protocol, i would like to highlight few points regarding this: 1. Communication b/w two devices can happen with just 1 wire/line also. So no mandatory need of two lines always i.e. Rx/Tx. 2. UART data/char/word bits can range from 2 to 11 also 12 sometimes, this is configurable entity in modern uPs and uCs. 3. There are several encoding schemes supported by UART peripherals like NRZ, NRZ I, RZ and meny more, again configurable in HW, so not always 0/5V logic pairs(at UART level). 4. Handshaking mechanisms are also supported by UART peripherals in built sometimes like HW Flow Control and if not can be taken care in driver SW using software flow control mechanisms(using XON/XOFF chars). Thnaks :) Happy Learning :)

[@FoolishEngineer]

Thank you so much for the information!! It is very helpful

[@EdwardGrubb3rd]

What hardware do you rcommend to be used as a universal reader to decode firmware?

[@Shiden67]

I understood one chapter of Computer architecture in 10 min thanks bro!

[@FoolishEngineer]

Thank you so much for your support!!! I will.

[@lousaileong3922]

Thank you . I was searching several videos and your video explain definitely much clear!

[@FoolishEngineer]

Thank you so much for watching!! Please don't forget to subscribe to our channel

[@rammuga1341]

Very nice Video, Understood many things. Thank you very much

[@Marc_Wolfe]

"I hope you got something from this." Barely got what I needed. UART = Serial at TTL voltage levels and without extra pins. All I needed to know.

[@RilwanullahMN]

Really a nice video. One point is that in the computer and printer example...yes it is low to high voltage at computer side and high to low voltage at the printer side during data transmission from computer. But when the printer sends any response/ acknowledgement/handshake data to the computer, it is vice versa, which is not explained in this video.

[@FoolishEngineer]

Thank you so much for watching!!

[@rakeshgiri6750]

You are best than college professor easy and understandable, ❤🙏🙏

[@FoolishEngineer]

Thank you so much for watching!! Please don't forget to subscribe to our channel

[@mrmilan2012]

No any word.. Only Fantastic.. Fantastic.. 👍👍👍🙏

[@FoolishEngineer]

Thank you so much! Please show support to my video with Super thanks and don't forget to subscribe to our channel

[@debsarkar4893]

Amazing!! Super helpful video and helped me grasp the concept of easily! Thank You!! BTW that sound at 0:24 sounds nostalgic idk why :)

[@piethelderop8085]

you explain this very well

[@FoolishEngineer]

Thank you so much!

[@ferb1rahert]

Okay that was a good solution idea :D (to watch it again) yeah I liked this tutorial btw thank you

[@mforrest85]

Wow you are really good at explaining stuff like this.

[@FoolishEngineer]

Glad you think so!

[@amitmakani9000]

Very nice video

[@FoolishEngineer]

Thanks!! Keep watching

[@andrewsotnikov5680]

Good video. Actually I could not umagine rs232 transmit data at high voltage range

[@StreuB1]

This was so well explained!!! Thank you!

[@FoolishEngineer]

Thank you so much! Please show support to my video with Super thanks and don't forget to subscribe to our channel

[@bavithra7587]

Uart is asynchronous protocol -data will be tx from sender to rx without clk signal then where the clk signal is produced and given to transmitter?

[@clapandslap]

Baud rate?

[@teaguehall17]

Overall good video. Maybe some areas to expand on: What does asynchronous mean in UART? (i.e. no dedicated clock signal is used, thus each client needs to agree on the baud rate ahead of time). How does the parity bit get used in practice? If a corrupt data frame is received, is it just up to the receiving client to ignore the data?

[@keerthibhushanm6693]

You solved my doubt that i had even at the end of the video. Thank you

[@surenbono6063]

.. remember if tx can send 9600 bits/sec...the rx side can only store 640(64bytes) bit per receive...so it need ~ 15 tx msg / second to receive 9600 bits..for Arduino..not sure about other hardwares..

[@ea9334]

Do you have one about the X and Y capacitor in switch modesz?

[@avin6602]

Thanks! Very useful video! Little question. Is the stop bit must be longer then one clock pulse? I dont fully understand how the receiver knows the difference between the data to the stop/start bits

[@FoolishEngineer]

No stop bit is not longer than 1 clock pulse. Start bit is Transition from high to low And stop bit is transition from low to high. How it is differentiated from data bits? As we have discussed in earlier videos, When there is no data on the line that is when data lines are idle, Lines are set to high level. to indicate the data transfer will be initiated on next clock pulse

[@_ndot]

@Avi N The way it distinguishes from the data and the stop bit is by the size of the frame. Remember that because there is no clock some things must be agreed between the transmitter and the receiver before the communication starts, like bit speed, character length and parity. Let's see an example of sending 5 bits of data with parity. Transmitter (sends 8 pulses): - 1st pulse high-to-low for the start bit - 5 pulses of data - 1 pulse for the parity bit - 1 pulse stay/change-to-high for the stop bit Receiver: - Detects the high-to-low to start reading - Reads the next 6 pulses (data plus parity (this was agree beforehand)) - Expects the next pulse to be high to indicate the stop of transmission - Since it read the number of bits it was expecting it starts listening for that high-to-low signal again that indicates a new packet.

[@VarunPrasaathKS]

I have a doubt...what if the the sample signal has two 1s adjacent in it( eg. 101101); will it be considered as a message to stop data transmission? If so, the rest of my data will not be transmitted..

[@shakthianistonshakthi6918]

Yes really nice video thankyou for ur effort

[@FoolishEngineer]

Thank you so much for watching!! Please don't forget to subscribe to our channel

[@RafyoMusic]

great video! So easy explained, thx a lot!

[@FoolishEngineer]

Thank you so much! Please show support to my video with Super thanks and don't forget to subscribe to our channel

[@EdwardGrubb3rd]

I am looking to purchase a universal UART hardware to reverse engineer firmware used in an array of main boards used to control ASIC Crypto Mining Hashboards... What hardware do you recommend?

[@mohammedjawadforelectronic9190]

Hi dude i have a drone dji phantom and it has a uart on the reciever baord , the question is can I get more control from it such as lights or bezer or moving servo motor by communication it with Arduino . thanks

[@FoolishEngineer]

You can try! if it has UART ports

[@basuhosur-nh4di]

how to interfae uart with microcontroller and also tell the hardware connection 0f uart

[@arpithanair1524]

Can u explain what will be inside transmitter and receiver and how we can design this

[@FoolishEngineer]

Please check 2nd part of the UART communication! you will understand. Transmission & reception

[@MrDhananjayjadhav]

Good work bro.

[@FoolishEngineer]

Many many thanks

[@kartiksingh-ko2lz]

Can you actually implement this UART in a circuit? That would be helpful

[@FoolishEngineer]

I'll do it

[@richierich3135]

sahi baat hai

[@ShivamKumar-ky6vm]

Hello , can u explain how data is traversing , i mean , when the transmitter starts , the reciever gets signal its starting , then after that all the 8 bits so left are sent at once or like bit by bit , is it FIFO ??? suppose my data is 101011 just suppose ignore start and stop and ignore parity so the reciever will recieve 1 first then 0 , then 1 then 0 , then 1 and then 1 or it will go at a blink -- 101011 ??? lastly , what i feel shouldnt it be recieving 110101 like just opposite or mirror image of it ??

[@Henry-sv3wv]

bit send order uart is least significant bit to most significant bit. there is no clock wire connection (asynchronous serial interface), so both (sender/receiver) must have been set to same baudrate so they can regenerate a common clock timing to send/read the bits with correct timing ...

[@shirleyachara3809]

Good work, thanks.

[@FoolishEngineer]

Thank you so much for watching!

[@ironic4love]

As far as i known, RS232 is Not a protocol, it is electrical standard

[@Ankit.max.]

how to write the code for UART communication

[@georgeh1352]

Has USB replaced UARTS? confused

[@xrafter]

Usb has replaced most serial connectors. However because UART is cheaper, you would find it in cheap microcontrollers

[@nakulchauhan6713]

Why is it said that UART is hardware or in built circuitry whereas this thing is not used with I2C and SPI. They just say i2c, spi are protocols?

[@nakulchauhan6713]

But I can see circuitry in case of SPI, i2c also, like they have Shift register, data register, control registers, status register and clock circuitry also.

[@FoolishEngineer]

i have never seen anybody denying that the UART is a Communication protocol

[@nakulchauhan6713]

@@FoolishEngineer yes but they say UART is a hardware but do not use Hardware word with i2c, spi

[@nakulchauhan6713]

why is it so?

[@FoolishEngineer]

please show us such a references and we will get back to you with our understanding!

[@sameer-gm3zy]

Are u from india? I am sameer, would u like to work on one project! we are planning to launch at the end of this year! I am having trouble to get flair electronic engineer!

[@FoolishEngineer]

Hi Sameer, I am from India, please drop me a mail on [e-mail] and we will discuss on this further.

[@copyrightmaster238]

Why it has start bit and end bit?

[@FoolishEngineer]

To ensure the communication has started or it has been endded

[@An_art_appreciator]

we don't use clock signals. So start bit and end bit is required to ensure that the data is transmitted.

[@ZimmermanBennett-s9s]

Tony Shores

[@nanibujji7269]

Sry bro taken screenshots for college presentations

[@FoolishEngineer]

No Issues!! All the Best!!!

[@JohnJohn-gy2st]

Hello

[@searchofsuccess9693]

Kannada

[@userr3x]

hello on my channel i connect uart usb rs232 converter to openbox gold mx7 satellite receiver based on gx6505s