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3 votes
0 answers
159 views

Unfortunately, I don't have any experience with async programming, so it took me quite some time to get my code running on a Raspberry Pi 5 4GB (with bookworm 2025年05月13日 OS) to communicate with one ...
1 vote
0 answers
158 views

TX works and prints info in console (I use Putty) but when I send on STM and echo I don't receive anything (and when I write symbols in console they don't appear). Baud rate and other config settings ...
0 votes
0 answers
43 views

I have been trying to transfer data via the USART2 module through the RX/TX (PA2/PA3) pins. Even though the configs are the same (9600, 8N1), and also the function returns HAL_OK, I still could not ...
0 votes
1 answer
95 views

Im trying to implement Continuous Recording for systemview over UART on an STM32F103. my application is using FreeRTOS v11. I am able to successfully get data in snapshot mode and view it in ...
0 votes
1 answer
201 views

I have been working on multiple projects of Embedded Linux from last 5 years but there is a small problem when I use UART. I am using STM32MP13F with MYIR board. The UART is connected to half duplex ...
0 votes
0 answers
81 views

I'm tinkering , and trying to get firmware out of my MIFI to study it, and I'm using UART to send fuzzy data to the MIFI, the the beginning I get: [14:32:08] RX 0d 0a 4d 4f 44 45 3a 53 50 49 20 4e 41 ...
1 vote
0 answers
77 views

I’m trying to talk to an EBYTE E32-900T30S LoRa module from a Raspberry Pi 4 using the Pi’s UART and a small Python wrapper. The module’s AUX pin goes HIGH, but I get no response to AT queries (e.g. ...
4 votes
1 answer
136 views

I’m following an excellent bare metal tutorial on the Arm Cortex-M4, and I ran into unexpected, somewhat intriguing trouble when trying to properly handle UART interrupts. Setup: Host PC: Linux x86_64,...
0 votes
0 answers
57 views

I am using SIMCOM A7672S module for Websocket communication for OCPP, whilw doing this I need to tx/rx data more than 1500 bytes for few commands but as per documentation of the module the max limit ...
3 votes
1 answer
602 views

I am using an STM32L476 dev board to buffer data that it is receiving serially through the virtual com port, in circular mode. I have decided to use the DMA of the STM32 and perform an echo with UART2,...
2 votes
1 answer
255 views

I'm trying to read out my DSMR5 electricity meter on an ESP-WROOM-32. I've connected the 3.3v from the ESP to the RTS on the meter, and connected the ground and TXD from the meter to the ground and ...
0 votes
1 answer
84 views

Microbit code like this: from microbit import * count = 0 def show_count_on_leds(c, brightness): display.clear() for i in range(min(c, 25)): x = i % 5 y = i // 5 ...
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-2 votes
1 answer
213 views

I've created this Python script to distill the problem down to its most fundamental. This works on Windows against COM3 (my Arduino programmed to return data via serial). Why doesn't this work on ...
1 vote
0 answers
104 views

I want to make a simple UART transmission / reception from the PIC to hyperterminal in proteus. I will start by showing my code, then state the problem: #include <stdbool.h> #include <...
0 votes
2 answers
89 views

I'm trying to connect a fingerprint sensor (Adafruit type) to my ESP32 (DOIT ESP32 Devkit V1), but the Serial Monitor remains completely blank, even though I'm using Serial.begin(9600) and printing ...

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