Is it possible to get a program that uses symmetrical 1200 baud to communicate over serial to a device running at 1200/75? I've tried putting socet in between to create a virtual serial device running at 1200 and set the USB serial to 1200/75 but the far end still gets garbled text:
socat -d -d pty,link=/dev/ttyvirt,raw,nonblock,echo=0,perm=0777,b1200 open:/dev/ttyUSB0,raw,nonblock,echo=0,ospeed=b1200,ispeed=b75
The ispeed and ospeed options take integer numbers as argument, so try without the 'b' prefixes!
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It was successful to train from jet son-XAVIER and recognize it as cam. But I don't know how to send the information that jet son-XAVIER recognized in real time to Arduino. The objects we recognize are elk and wild boar. I know that I can only send 1 letter through communication, so elk will send e and wild boar to w. Is there a way to send it as soon as it recognizes it through real-time web cam?
There's not a lot of information here on your setup, but here's a possible solution:
I see the NVIDIA Jetson AGX Xavier module has USB-C ports.
Buy a USB-A to USB-C cable, and plug the Arduino directly in.
I'm not sure what program/language you're using with your trained model, but I'll guess that it's python for now.
You'll want to open a Serial connection to the arduino, and you can do this with pyserial:
https://pypi.org/project/pyserial/
You can send more than just one letter, you can send entire data streams. But, if you want to just send one letter, it will do that as well.
Here's the official documentation for how to communicate with an Arduino using Python:
https://create.arduino.cc/projecthub/ansh2919/serial-communication-between-python-and-arduino-e7cce0
If you're not using python, specify your language of choice, and we can look up and see if it has a serial library.
I have never used darknet but may be this can point you in the right direction.
I have used the library sugested by Bucky and I believe you could add the serial comunication to darknet.py. This is what I would do:
#Add this import at begining of the file darknet.py
import serial
#########################################################
#this is a mocked version of detect in darknet.py, assuming that the labels you used are "elk" and "wildboard". You should not add this lines to the file.
def detect():
res = []
res.append(("elk",0.98,(2,2,50,50)))
res.append(("wildboard",0.98,(2,2,50,50)))
return res
r = detect()
##########################################################
#Add this after the 'print r' at the end of the file darknet.py
ser = serial.Serial('/dev/ttyUSB0') # open serial port. You should check what serial port is assigned to your arduino.
for obj in r:
if obj[0]=="elk" and obj[1]>=0.9: #assuming 0.9 as the minimum confident for a detection
print "found elk"
ser.write('e') # you can send a string with just one letter
elif obj[0]=="wildboard" and obj[1]>=0.9:
print "found wildboard";
ser.write('w') # you can send a string with just one letter
ser.close() # close port
I have a Dell PowerEdge r630 blade which has a LED in chassis panel. I can turn it off or let it blink by running the following command:
ipmiutil -alarms -iN (N =0 for turning off, N = 255 for blinking)
I wonder if there's some commands to keep LED turned on instead of blinking. I tried some commands of ipmiutil but didn't get it work.
When reading http://ipmiutil.sourceforge.net/man.htm#ialarms, we see :
-iN Sets the Chassis Identify feature, which can be an LED or some
other alarm. If N=0, turn off the Chassis ID, otherwise turn
the ID on for N seconds. N=255 will turn on the ID indefi-
nitely, if it is IPMI 2.0.
I use two FIBOCOM G510 GSM modems but one of them returns ERROR in some commands like:
AT+CMGF=1\r, AT+CPIN=? returns ERROR.
But some like ATE0\r, AT+CLIP=1\r, AT+CBAUD?\r returns OK.
I use baudrate 115200.
Q1:ATE0\r
R1:\r\nOK\r\n
Q2:AT+CBAUD?\r
R2:\r\n+CBAUD: 115200\r\n\r\nOK\r\n
Q3:AT+CPIN=?
R3:\r\nERROR\r\n
Q4:AT+CMGF=1
R4:\r\nERROR\r\n
Is there something I should set first or is it simcard issue or modem fault?
My other unit works good but I tested it 3 months ago and I think I would use some additional commands to prepare.
I am confuse what's its wrong?
I checked sim card wiring for 3rd time and I found cardinal mistake. Socket was upside down and even wires was connected to the "right place" it did not comunicate.
After rewiring modem starts to work well.
Q5:AT+CPIN?\r
R5:\r\n+CPIN: READY\r\n\r\nOK\r\n
MDrive 23 motor takes commands from a terminal, and I got it to work with screen program:
screen /dev/ttyUSB0
Is this is called a serial terminal? I'm unfamiliar with the details of the connection, but feel like I should be able to use PySerial to send the commands.
I tried:
import serial
ser = serial.Serial('/dev/ttyUSB0', 19200)
ser.isOpen() # Returns True
ser.write('ma 100000\r\n') # Does nothing...
ser.inWaiting() # Returns 0
ser.close()
I didn't know how to set the other init variables, like:
parity = serial.PARITY_ODD,
stopbits = serial.STOPBITS_TWO
bytesize = serial.SEVENBITS
I'm going to try guessing some values next... The documentation is lame, but it mentions MODBUS TCP and Mcode.
How do I set these and are there any syntax errors in my snippet?
I know how to send arguments to the Serial object, but I do not know what values are typical.
The other parameters to the Serial constructor are set in a similar way as port and baudrate:
ser = serial.Serial(port = '/dev/ttyUSB0', baudrate=19200, bytesize=serial.SEVENBITS, parity=serial.PARITY_ODD, stopbits=serial.STOPBITS_TWO)
ser.write('whatever')
ser.flush() # wait for data to be written
ser.close()
Edit: It seems the default settings are 9600 baud, 8 bits, no parity and 1 stop bit. In addition no flow-control is used. That would be equivalent to:
ser = serial.Serial(port = '/dev/ttyUSB0', baudrate=9600, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, xonxoff=False, rtscts=False, dsrdtr=False)
As all values, except port, are set to their defaults, you may use:
ser = serial.Serial(port = '/dev/ttyUSB0')
The last thing to worry about is which (read) timeout to set. This is measured/set in seconds (float allowed) and sets how long a read() command will block before returning what has been read.
I'm trying to get the SIM number (ICCID, not IMSI) of my 3G Huawei E5830 modem using AT commands (also called Hayes command set).
Unfortunately, it's not specified in the modem formal documentation.
for sim900 AT+CCID
gives CCID.
e.g.89912200000280775659
The first two digits (89 in the example) refers to the Telecom Id.
The next two digits (91 in the example) refers to the country code (91-India).
The next two digits (22 in the example(MNC of IDEA)) refers to the network code.
Try "AT^ICCID?". tested on Huawei E173.
It works with AT+CRSM and also AT+CSIM.
AT+ICCID on galaxy S4 in modem mode.
AT+CICCID on an Iridium satellite modem.