All Questions
Tagged with serial communication
124
questions
0
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0
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38
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Fingerprint sensor module communication (FPM383 R503)
I'm working on a fingerprint sensor that is known as FPM383. It is much like the well known R503 sensor. Their datasheet and serial communication manual are almost identical.
I was trying to control ...
- 291
1
vote
0
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43
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ESP32-C3-MINI-1-N4: can't establish Serial connection but can flash code
I've recently build my own dev board utilizing the ESP32-C3-MINI-1-N4 module. Everything works pretty well and just as expected, I can control a few onboard LEDs just fine and upload code and ...
- 11
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33
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SCI-TX doesnt work properly (Serial communication)
Part Number: TMS320F280025C,
Other Parts Discussed in Thread: LAUNCHXL-F280025C, C2000WARE,
I have a simulink model for a power electronics project and i want to see detailed data using SCI-TX port in ...
- 1
0
votes
1
answer
138
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max3232 disconnection suddenly - problem
Hi I use a Max3232 chip to connect the RS232 between the microcontroller(STM32F103) and an HMI, the problem is that sometimes this connection will be disconnected and no longer work, this may happen ...
0
votes
3
answers
470
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Understanding RS422 and choosing drivers
I want to communicate 2 MCUs using RS422. I need to have some isolation, so the driver should have 3.3V side and 5V side, isolated. All I can find in the market are half-duplex drivers, I understand ...
2
votes
0
answers
49
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Serial communication between Arduino and computer cuts out after a while and doesn't reconnect. Why?
I've just kept an experiment running the whole weekend. Arduino controlling heat and humidity and sending data over serial to my computer. I had a python program reading Serial data and populating an ...
- 339
13
votes
4
answers
2k
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How were standard serial port baud rates chosen?
How were standard serial port baud rates chosen? 1200, 9600, 115200, aren't the numbers we'd expect (powers of 2 or 10), but don't seem random either.
Wikipedia states
Many of these standard modem ...
- 1,135
1
vote
1
answer
651
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How can I find which serial port is connected to Nucleo board via ST-LINK?
I have a Nucleo board connected via USB to ST-Link running on Ubuntu Linux. ST-Link works well in that it can program the board. I would like to use the built in virtual serial port, but am not sure ...
- 1,135
0
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41
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I2C issue communicating with an analog to digital converter mux ADS1015 through TCA9548A I2C multiplexor
I am using a Raspberry Pi Zero 2 to talk through a TCA9548A to multiple ADS1015, each ADS1015 is on a separate SDA/SCL channel of the TCA9548A. I am able to scan all channels and see the active ...
user298907
1
vote
2
answers
67
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Analyzing the complexity of a number in the Arduino IDE
I'm working on a project where I'm linking a calculator (TI-84) to an Arduino (Nano) and I want some way of classifying or quantifying how complex a single number is (small whole numbers being very ...
- 321
6
votes
9
answers
6k
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Is there a way to use any communication without a CPU?
I am looking for a way to communicate without using a CPU on one side of the communication.
For more details, I have many cards that need to communicate with one main card on which there is a CPU. ...
- 93
0
votes
1
answer
112
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Unable to clear faults on Monoblock via RS232 command: Need help decoding serial messages with Arduino
I recently purchased an XRB160PN192 Monoblock with a known fault of high voltage (HV) for a low price to use in my graduation project. After reading the user manual, I found that the HV error, along ...
- 21
0
votes
2
answers
197
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Serial reading returns undefined characters
I am trying to communicate using LoRa modules with an ESP32. I can easly communicate with two LoRa modules, but if I want to learn the sender address, the Arduino returns an undefined character. I am ...
- 1,139
2
votes
1
answer
1k
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Modbus TCP illegal packet (CRC) time-out problem in gateway
I am connecting a Modbus gateway to an RTU acquisition system. I am using a MOXA Gateway MB3480 with a RS485 (2 wires) connector. The thing is that I can't read the data all the time; I receive a time-...
0
votes
4
answers
192
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Drive long cable directly with opto isolator 6N137 (open drain OP)
I would like to use serial comms between atmega328p microcontrollers over lines up to about 20 meters long, at speeds of around 9600, with the first choice of cable being cat5. Opto isolating them ...
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