Questions tagged [serial]
In serial communication data is transmitted as a sequence in time. Main advantage: much less wires needed. Main disadvantage: Higher bandwidth for the same throughput.
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Does this digital line-encoding/keying scheme have a name?
"1" is a single low pulse of length T, followed by a single high pulse of length T
"0" is a single low pulse of length 2T, followed by a single high pulse of length 2T
This is similar to BFSK, ...
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How to figure out the correct serial port parameters?
I am trying to listen to a device which communicates via a serial port. I've built a monitoring adapter and set up a python script, which works really well. I just don't know the exact length and ...
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clocking MSP430 UART from DCO
I'm designing a simple remote-controlled sensor.
It's going to be connected with others and a master device using RS485.
All it's going to be doing is transmitting the status of a few digital lines ...
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Signal identification: What serial protocol does my desk use?
Can anybody identify what kind of signalling protocol this is?
I'm sampling at 2 MHz. Here's the first falling edge of the signal, with a default UART protocol decoder for reference (8 bits, no parity,...
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Mid-bandwidth data and power over coax
I am interested in transmitting both digital data and power over a single coaxial cable between two FPGAs. Communication should be at least half-duplex. Communication speed should be on the order of ...
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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 ...
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Determining a serial protocol of an industrial crane
I'm currently trying to read packets sent between a small truck-mounted crane's controller (handheld device with joysticks/buttons/etc) and its control box. The communication occurs over a single data ...
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Reason to have MSB in a serial communication always high
I'm working on a code (written by other people) that uses a custom protocol to transmit data over RS485 in 8-bit packets.
For some reason, the protocol is built so that every 8 bits transmitted are ...
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Reverse engineering hardware serial interface, unexpected output in PuTTY
I have a Chinese laser controller with a touch screen interface. I've worked out that the touch screen is a standard off the shelf product communicating via RS422 with a custom control board. I'm ...
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Capacitance/length limitations when daisy-chaining microcontrollers
I'm doing a daisy-chain of microcontrollers, with a half-duplex bidirectional line going from DOUT/DIN ports.
I was thinking of doing tristate for the ports, and have a pull-up resistor connected to ...
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ESP-WROOM-02 is not responding to AT commands as expected
I using the ESP-WROOM-02 (esp8266 core) as WIFI module and the Arduino nano IOT 33 (samd21g18) as main processing unit. I flashed the ESP-WROOM-02 via the ESP flash download tool with the AT Firmware ...
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What is the correct speed for serial communication?
I am working with an STM32, more specifically a Nucleo-L476RG development board. I used the I2C ports to build a small virtual com port to broadcast some messages back to my computer.
The code on the ...
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Detect LOW signal in a two-way IO line that's HIGH when idle
I am trying to implement the ISO 7816-3 protocol as can be found in the EMV Co. Book 1 using an ESP32 and MicroPython. However, I noticed that the default state of the I/O line is HIGH, and there's ...
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ESP32 Arduino Bluetooth Serial does not reconnect after disconnecting
The basic ESP32 Arduino Bluetooth Serial example pairs and connects as expected, BUT once I disconnect the Bluetooth terminal it stops responding to new events at all. Once I reset the ESP32, it ...
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CAN Frame Malforming on Oscilloscope
I have a working 500kbps CAN bus between an Arduino Uno and a RaspberryPi. Both are connected to MCP2515/TJA1050 boards from Amazon and communicating over SPI. The RaspberryPi dumps the CAN data via ...
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