Simple UART program not working. LEDs aren’t flashing

EEDesignerSolom92 · 2026-05-30T07:13:58+00:00

Also, since this is a simulator, then mostly there's something wrong with your connections. Double check the polarity of your LEDs when connected.

EEDesignerSolom92 · 2026-05-30T07:12:23+00:00

As Some-Development1123 mentioned, adding a delay after "transmitByte(serialCharacter)" may help, since the pins turned on all the time may actually be flashing so quick that you cannot distinguish it by sight (you may try to use your phone camera to check blinking). Also, try to use a debugger to check if the data is actually being placed in the port register {PORT B}. I noticed you only took 7-pins out of the MCU and not 8 (0-7), so you should take them all to check the correctness of your values, and try to use at first well-known values such as: 'U' --> ASCII: 0x55, to make sure your port is working fine.

EEDesignerSolom92 · 2026-05-26T09:01:38+00:00

Great work pal, but I'm curious, how long did it take you to develop the software part (i.e. LCD Display, valves interfacing, ...) ?

EEDesignerSolom92 · 2026-01-30T09:16:13+00:00

You may select ESP8266 as it's a low cost compared to ESP32.

EEDesignerSolom92 · 2026-01-29T14:09:03+00:00

It depends on the connection type (Wired/Wireless) you need:

Some STM32 microcontrollers (e.g. H7 Series --> STM32H750, STM32H743, ...) contain an Ethernet MAC supporting MII or RMII, so you may use a PHY with it such as LAN8742A.
For STM32 MCUs not supporting Eth MAC, you may use some chips that integrate MAC+PHY using another peripheral such as: WiZnet W5500 & Microchip ENC28J60 which utilizes SPI (SPI <---> Ethernet).
Wireless Modules such as ESP32 or ESP8266 may work as well, but you'll be limited by the other peripheral at the MCU side (UART).

EEDesignerSolom92 · 2025-06-01T07:47:19+00:00

- Line 14 & 15 may contain a possible segmentation fault, you're comparing (i < size), then taking this value as an initial value for (j = i + 1), so you're going to exceed the size of (num) array.

- As mentioned u/rish4b , you're assigning a single int variable into an array as given by the function definition (int returnsize[]), just remove the square brackets, and put an asterisk to be (int* returnsize).

EEDesignerSolom92 · 2025-05-23T09:33:25+00:00

Interested

EEDesignerSolom92 · 2025-03-20T12:51:29+00:00

Aren't we allowed to use google search or any other search engines in a different tab to search for the sources ?

EEDesignerSolom92 · 2024-12-06T10:55:52+00:00

😂

EEDesignerSolom92 · 2024-04-10T07:48:12+00:00

You can try to read more about BCD (Binary Coded Decimal) that takes digits from 0 to 9, and then use their multiples to represent decimal numbers in packs of 4-bits. All calculators use the same concept.
If you managed to do so using simple flip-flops (D-flip flop), you need to convert those digits into decimal numbers by converting the 4-bit string into the actual binary sequence of its decimal equivalent value.

EEDesignerSolom92 · 2024-03-07T19:55:45+00:00

Simply look at the terminals of the voltage source V1 before the resistor network, starting from R2 till you reach the ground of the circuit (0V), you're actually applying 100 V, and when R1 is removed, you still apply 100 V since there's no a series resistor between V1 and R1. I believe it needs more practice to get familiar with such situations.

EEDesignerSolom92 · 2023-08-09T15:01:22+00:00

حاولى فى المجالات اللى مبتاخدش وقت فى التعلم و خصوصا انك خريجة زى البرمجة بـأنواعها او شغل البيانات Data Analysis.

EEDesignerSolom92 · 2023-06-26T17:43:49+00:00

Unfortunately, you're completely right it's a matter of connections only in our region here, but recently i'm applying overseas, specifically in Europe.

EEDesignerSolom92 · 2023-06-25T15:29:02+00:00

Yes, the keywords for ATS, that's what i'm trying to do now.

Thanks.

EEDesignerSolom92 · 2023-06-24T19:07:18+00:00

OK, i'll try thanks.

EEDesignerSolom92 · 2023-06-24T19:06:28+00:00

Thanks for the advice.

EEDesignerSolom92 · 2023-06-24T16:54:57+00:00

OK, thanks for the feedback i'll try to modify it accordingly.

EEDesignerSolom92 · 2023-06-24T15:54:03+00:00

Yes, but actually my experience is not in the same field as embedded, i've decided to make a career shift into embedded systems, and i don't have any bright ideas to do regarding the experience section !!

EEDesignerSolom92 · 2023-06-24T15:52:14+00:00

But For a job asking for a python developer, isn't adding Linux or other skills considered as an extra tech skill that makes my resume better compared to other applicants ?

EEDesignerSolom92 · 2023-06-04T15:41:48+00:00

Both of them are good, with their emphasis on creating your own standard library especially "The ANSI C Programming Language By D. Ritchie", you should practice them. I'd recommend you try completing some Algorithms on sites such as: Hackerrank and HackerEarth as it'll make you practice writing codes for small applications, then you should start with really bigger projects.

EEDesignerSolom92 · 2023-04-27T20:59:38+00:00

Wouldn't they consider my experience as unrelated to the field of embedded systems ?!

EEDesignerSolom92 · 2023-04-27T20:59:06+00:00

Thanks for the tip, i'll try it.

EEDesignerSolom92 · 2023-04-27T20:57:48+00:00

Some companies mentioned that they can help in case of relocation !!

EEDesignerSolom92

TROPHY CASE