Questions tagged [serial]
In serial communication data is transmitted as a sequence in time. Main advantage: Fewer wires needed. Main disadvantage: Higher bandwidth required for the same throughput.
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What is the best microcontroller/SBC + stepper motor controller/driver combo to build a hexapod robot?
I would like to use a set of high power stepper motor controllers and drivers (e.g. Trinamic). Communication protocol of choice is SPI and motion precision is important. What microcontroller or SBC ...
4
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1answer
34 views
Why are serial manipulators almost always made of single dof joints?
I am currently taking my first robotics class and I found it curious that all serial manipulators have single dof joints. Why not use joints with more dof and reduce the number of components? Will ...
3
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1answer
48 views
When reading serial data between Arduino and a node, it hangs. How can I properly send and read data?
I'm using ROS2 foxy with no libraries installed. It runs on an Ubuntu 21.04 x64 machine with kernel 5.8.0-59-generic.
I created a project with the goal of controlling an Arduino using python serial in ...
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19 views
Jetson tx2 to Teensy 3.6 Serial communication issue
I am trying to establish serial communication between Nvidia Jetson Tx2 and Teensy 3.6. Using pyserial, while reading the data sent from Teensy 3.6 on Rx pin on the Jetson, I come to an error that ...
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14 views
Faulty GPS data on Serial Monitor
I am trying to interface Stonex S900A GPS with nVidia TX2 which has ROS melodic installed. The GPS data cable is a DB9 type (RS232). I connected a DB9 to USB converter with the cable and connected it ...
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2answers
60 views
How do you send multiple data bytes to Irobot Roomba via python serial
So I'm trying to send commands to my Roomba Discovery via python serial and it works fine as long as it only requires the command opcode. The commands that require additional data bytes (like specific ...
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46 views
Smart Servo Motor Type Comparison
I have been using the standard MG90/SG90 servo motors for years now and am familiar with them. Recently, I am trying to build a robot dog with them with no success. The motors keep on vibrating and ...
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32 views
solid communication methods for a docking robot
I have a simple robot which drives along a track and waters plants. After each watering mission, it should return to its dock for further instructions. The dock has a Raspberry Pi, while the robot ...
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2answers
50 views
Is this encoder error expected?
I'm working with the iRobot Create 2. When I read the encoder count and sum it for total, I'm able to do so without apparent error. I've used this to 'successfully' estimate position combining with ...
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87 views
Waking Up Roomba Over Serial
Sorry if this is a noobie question, it's my first time posting on this forum...
I've been trying to mod an old Roomba 400 series (model #4220) by adding a raspberry pi to it. (I know real original ...
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1answer
64 views
iRobot Create 2 opcodes, data bytes and Realterm
I recently purchased an iRobot Create 2.
To connect to it, I am using RealTerm
Although I can send opcode commands that do not require a Data Byte (128, 173, 133, etc), I cannot figure out the format ...
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107 views
Serial command receiving failure with Arduino and Adafruit shield from C# desktop application
For a long time I use Arduino Uno controller and Adafruit Servo Shield with 6.3V 1000 uF capacitor, powered with 6V 8Amp adapter to control 8 digital servo motors ...
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1answer
485 views
Not able to communicate with Roomba with serial port
I have an IRobot Roomba model number 565 and I am trying to control it with a Wemos D1 mini with Roomba's OI.
I connected the TX and RX pins from my FTDI adapter to the Roombas RX and TX and I can ...
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1answer
113 views
Manipulability Measures of Serial Robots?
I need to create a dataset of dexterous workspaces for a significantly large number of serial robots with varying DoFs.
My question is if there is an efficient way of measuring a robot's ...
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1answer
48 views
Why does singularity condition for a serial manipulator never involve the first joint variable
In planar 2R the singularity condition involves the second joint variable. In spatial 3R, singularities involve second and third link lengths and angles. Why does the first joint parameter never ...
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58 views
Can't get iRobot Create to respond
We have an iRobot Create connected to a Win 10 PC with the cable supplied with the unit.
We have followed the instructions here:
http://www.robotappstore.com/Knowledge-Base/How-to-Use-a-RealTerm-...
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3answers
349 views
iRobot 600 series OI wake from sleep via BRC
I have attached an Adafruit Circuit Playground Express to my Roomba OI, and after manually waking it up I am able to successfully send opcode commands based on the Roomba OI Manual. I can even start, ...
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2answers
183 views
iRobot Create 2 Wake over Serial on Rpi
So this thread is similiar to this one:
IRobot Create 2: Powering Up after Sleep
All except I am trying to do this on an RPi.
I have followed these intstruction:
https://www.irobotweb.com/-/media/...
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1answer
20 views
Does Create 2 have a built in optical interface (IR remote) using the Open Interface Spec
I was starting to work on the Arduino interface (and Raspberry Pi) using the USB serial cable for the Create 2 , as a baseline to build other outer loop controls.
My wife asked me why I would do that,...
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1answer
271 views
Get data without command anything from Roomba Create 2
I use Arduino Uno R3 connected to the Roomba Create 2 as in this picture
All the output commands for Arduino work fine but I have a problem from reading data from Create 2 sensors: I get invalid/...
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1answer
70 views
Getting error on serial monitor when using serial controlled motor
I am using this motor in a robotic arm.
I wanted to move it to a position and the position was provided via an input but I am getting errors on Serial Monitor. Initially when I tried this , name of ...
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1answer
238 views
Controlling a dc servo with serial communication
I am going to buy this motor :-
https://robokits.co.in/motors/encoder-dc-servo/faulhaber-coreless-17w-encoder-motor-120rpm-pid-dc-servo-drive?zenid=im3bp6grppt2f2ofdo2r6pq5c2
The datasheet of its ...
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1answer
3k views
MSP (Multiwii Serial Protocol) receiving data with pyMultiWii issue
I want to get telemetry data from my flight controller (Matek F405-CTR) and send control commands to it via MSP protocol.
I've already configured UART3 port on Matek in Inav configurator (look at pic)...
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1answer
30 views
RS-232/422, UART, usb sensor access code same? [closed]
Is the method to access all the sensors with RS-232/422, uart and usb sensors can be done in same way? Or by converting rs-232 to usb, uart to usb can they be programmed in same as usb from linux?
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53 views
How to access UART or serial sensors?
I want to connect ir range finder (dlem 20) with the system running Linux kernel. It looks like they don't provide any kind of SDK or drivers for their products. So ...
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3answers
2k views
Create 2 losing serial communication after toggling full to passive while charging
We are having an issue where after toggling the create 2 from passive to active, then waiting a few seconds and toggling back to passive while on the charger, all serial communication fails a certain ...
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1answer
527 views
Can I use another GPIO pin on the Pi 3 as a RX UART?
I accidently plugged 5v in to the RX UART pin 15 on my Pi, now I'm unable to receive communication on this pin from my connected device. I was wondering if it's possible to use a different GPIO pin as ...
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1answer
498 views
Build a drone with a raspberry pi 2 as receiver for the CC3D-LibrePilot
I tried to get the yaw, roll, pitch and throttel integers from the pi to the CC3D with python and c++ as PWM signal over the GPIOs but the output didn't seem to be right or it was delayed.
Could ...
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1answer
598 views
Programming Roomba other than Create 2 using RaspberryPi [duplicate]
Do other Roombas have an Open Interface like the Create2? Can I send commands to my 780 like the Create 2?
I am trying to control my Roomba 780 I made a 8pin FDTI connector to USB and my roomba beep ...
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1answer
65 views
Communication between Intel Edison and Open Mv7
I'm trying to do a simple communication between an Intel Edison and Open Mv 7 Camera through UART (Tx/Rx). I assumed this would be a simple task but both sides receive "�". Both are using python, the ...
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1answer
88 views
iRobot Create 2 -language set error type 2
I have an iRobot Create 2 and I am connected to it with the 7-pin connector to a desktop machine via USB. Serial communication is working fine under that configuration. I can tell it to restart with ...
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684 views
Irobot Create 2 Open Interface Communication
I am able to connect the create 2 robot to my laptop with a serial cable. I am using putty_beta terminal to run. I am not able to key in commands in the terminal. but I am able to receive information ...
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2answers
28k views
how to read and write data with pyserial at same time
How can i make pyserial read and write at same time or at same program? Right now i only know how to either write or to read but not both simultaneiously. So how can i do it? I tried this simple code:
...
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1answer
256 views
DX100 controller communication protocol
I have a motoman robot for use in a pick and place application. It has a DX100 controller which has an ethernet interface which could be used to control a slave device using the Modbus TCP protocol.
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1answer
149 views
How to remotely send command to a robot connected to a separate machine through serial port?
I work with a XL20 robotic tube sorter(lets say it's called X) which is connected to lets say computer(Y - IP: 10.216.1.222 - Running win7) through serial(com port 8 at 9600 baud and odd parity). If I ...
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2answers
731 views
Does iRobot 681 have a serial interface?
I've read that recent Roomba 6XX from iRobot got a serial connector, but I removed the cover on my Roomba 681, and I haven't found any. From what I've found, 681 hasn't the same cover than other 6XX ...
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1answer
1k views
Reading multiple signed digits from serial port
I'm using simulink support package for arduino to read serial data from port2 in Arduino due. My plan is to read signed integers (-415 for example) representing motor speed and feed it to the pid ...
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1answer
499 views
"Updated" Help in iRobot create serial communication in Arduino
I am programming an iRobot Create to follow serial commands using Arduino Uno. I have written the library, and found the serial commands to move the robot forward in the iRobot manual, but I couldn't ...
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1answer
147 views
Cleanflight : 4 first channels not working and "Failed to open serial port"
I just finished assembling my new 250 quad which is equipped with an SP F3 Flight controller.
I think that I kinda bricked my FC in the first 10 minutes of configuring it:
I first plugged it in, ...
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3answers
2k views
Do I need the 5V to 3.3V level shifter?
I would like to follow the instructions here, to allow myself to control the Create2 with a Raspberry Pi 3.
However, this source, says that I need a level shifter to protect my Pi's circuitry from ...
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0answers
321 views
Irobot Create 2 drawing power from Pi [closed]
I am controlling an IRobot Create 2 with a raspberry pi, which I am powering with one of these:
https://www.adafruit.com/product/1566
(I know, I know, I should have just gotten power from the ...
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1answer
482 views
What software to use to send (OI) commands to Create 2. Using windows laptop and supplied Create 2 cable? [duplicate]
I read most of the iRobot Create 2 Open Interface (OI). It says send these serial commands to the Create 2 to get it to do the described action, but no suggestion of what software to use to send these ...
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1answer
104 views
create2 commands with an app called SERIAL
there is an app called SERIAL, available in the app store.
I've downloaded it on my mac and am experimenting with it, any ideas on how to send create2 OI commands using "Serial"?
so far it seems a ...
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1answer
2k views
Connecting a CC3D board with Raspberry Pi to get telemetry data
I want to get telemetry data in my Raspberry Pi that will be connected to a CC3D board either via USB cable or Serial communication. How can I get the data? I plan to have wifi communication between ...
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1answer
425 views
How do I get the Create 2 to communicate with a laptop via the serial to USB cable?
My computer will not recognize the Serial to USB cable. I have tried it on a Mac and an HP.
Is there a driver that I need to install? If it is supposed to install automatically, it is not.
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125 views
increase current draw from serial port of icreate 2
This is from the icreate 2's document:
"Pins 1 and 2 (Vpwr) are connected to the Roomba battery through a 200 mA PTC resettable fuse. The continuous draw from these two pins together should not exceed ...
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1answer
668 views
iRobot Create 2 serial battery power
I don's seem to be able to get any battery power from Create 2. I spliced the original cable it came with, and tried to use the power from red/purple(+) and yellow/orange(-) to power a Raspberry Pi2, ...
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2answers
1k views
iRobot Create Serial Cable for Turtlebot I
I need an iRobot Create Serial Cable (one end 7-pin Mini-DIN Connector and the other end is USB) for Turtlebot I. How can I connect my bot to my PC?
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1answer
488 views
Using 2x UARTs on STM32F072RB
I am trying to use 2x UARTs with ChibiOS on the STM32F072RB Nucleo Board.
I initialized UART2 but I am still getting output on UART1 pins, which is totally weird.
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1answer
83 views
Is it possible to have A/V feed and serial communication on an RF transceiver at the same time on an Arduino?
Is it possible to transmit live audio/video feed and at the same time, receive commands through UART using only 1 RF transceiver connected to the Arduino board?
I want to control the Arduino through ...