In my project, I need to read Output Frequency of VFD using arduino Uno through MAX485.
Manual of Delta VFD :- http://www.realimpeks.co.rs/download/delta_vfd_el.pdf
On Page 4-95(138), In 2103H address output frequency data is stored.
I'm confused which library to use and make program for desired result.
Thanks in advance if there's any help given.
Related
I have ESP23 dev kit with micropython firmware esp32-idf3-20200329-v1.12-317-g688323307.
I also have ds18b20 waterproof sensor. datasheet link
I wrote this code for it:
import time, onewire, ds18x20
import machine
from machine import Pin
ds_pin=Pin(19)
ds_sensor = ds18x20.DS18X20(onewire.OneWire(ds_pin))
roms = ds_sensor.scan()
for rom in roms:
print(rom)
It returns tis info:
[bytearray(b'(\xbcN6\x14\x19\x01\xba')]
Before reading temp data from sensor, we first need to use the scan() function to scan for DS18B20 sensors. The addresses found are saved on the roms variable (the roms variable is of type list). scan() function sends request and sensor returns its unique 64-bit serial code.
I used manual here
Today I bought two more ds18x20 waterproof sensors (I don’t know what type of sensor - ds18a20/ds18b20 or else - are they, ‘cause eager chinese manufacturers sealed sensors inside metal bullet too good, so I can’t just look inside).
I tried to run the same code with them, but it returned the following:
bytearray(b'(\xff\xff\xff\xff\xff\xff\xff')
bytearray(b'(\xfe\xff\xff\xff\xff\xff\xff')
bytearray(b'(\xfc\xff\xff\xff\xff\xff\xff')
bytearray(b'(\xf8\xff\xff\xff\xff\xff\xff')
bytearray(b'(\xf0\xff\xff\xff\xff\xff\xff')
bytearray(b'(\xd0\xff\xff\xff\xff\xff\xff')
bytearray(b'(\x90\xff\xff\xff\xff\xff\xff')
bytearray(b'(\x90\xfe\xff\xff\xff\xff\xff')
bytearray(b'(\x90\xf6\xff\xff\xff\xff\xff')
bytearray(b'(\x90\xe6\xff\xff\xff\xff\xff')
bytearray(b'(\x90\xc6\xff\xff\xff\xff\xff')
bytearray(b'(\x90\x86\xff\xff\xff\xff\xff')
bytearray(b'(\x90\x86\xfd\xff\xff\xff\xff')
bytearray(b'(\x90\x86\xf9\xff\xff\xff\xff')
bytearray(b'(\x90\x86y\xff\xff\xff\xff')
bytearray(b'(\x90\x86y\xfe\xff\xff\xff')
bytearray(b'(\x90\x86y\xfa\xff\xff\xff')
bytearray(b'(\x90\x86y\xf2\xff\xff\xff')
bytearray(b'(\x90\x86y\xe2\xff\xff\xff')
bytearray(b'(\x90\x86y\xa2\xff\xff\xff')
bytearray(b'(\x90\x86y\xa2\xfd\xff\xff')
bytearray(b'(\x90\x86y\xa2\xf9\xff\xff')
bytearray(b'(\x90\x86y\xa2\xf1\xff\xff')
bytearray(b'(\x90\x86y\xa2\xe1\xff\xff')
bytearray(b'(\x90\x86y\xa2\xc1\xff\xff')
bytearray(b'(\x90\x86y\xa2\x81\xff\xff')
bytearray(b'(\x90\x86y\xa2\x01\xff\xff')
bytearray(b'(\x90\x86y\xa2\x01\xfb\xff')
bytearray(b'(\x90\x86y\xa2\x01\xf3\xff')
bytearray(b'(\x90\x86y\xa2\x01\xe3\xff')
bytearray(b'(\x90\x86y\xa2\x01\xc3\xff')
bytearray(b'(\x90\x86y\xa2\x01\x83\xff')
bytearray(b'(\x90\x86y\xa2\x01\x03\xff')
bytearray(b'(\x90\x86y\xa2\x01\x03\xfe')
bytearray(b'(\x90\x86y\xa2\x01\x03\xfc')
bytearray(b'(\x90\x86y\xa2\x01\x03\xdc')
bytearray(b'(\x90\x86y\xa2\x01\x03\\')
When I try to read temperature using this values it returns ‘CRC error’.
What can be done? Is the problem with code, or the sensors are failed somehow?
Connect one sensor at a time when you do the scan.
You haven't shared how you're wired the DS18x20 sensor. Make sure its positive power connection is to 3.3V not 5V.
Make sure you've connected a resistor (4.7K should be good) between the data pin of the sensor and 3.3V. OneWire devices absolutely won't work reliably without this resistor - you might see the kind of problem you're seeing.
If you're sure it's wired correctly the next step would be to try it with different firmware, for instance a Dallas one-wire scanner using the Arduino Core. That would eliminate the possibility of problems with the library you're using and MicroPython.
looks like fake sensor
How to tell original from fake DS18B20 temperature sensors
Looks like i'm a fool))
Yes. One 4.7K pull up resistor and it's alive! IT'S ALIVE!!
aaaand whats'up doc?
then we use internal PULL_UP mode we pull up signal only for ESP.
BUT! DS18B20 is microchip too. And the wire for little DS18B20 is like giant radio aerial.
Maybe in my first sensor this problem was solved on hard level.
I have been unable to find any documentation regarding using python to change the GPIO outputs, and was wondering whether there was any specific code i could use to change it or if there were any third party programs that allowed me to do so.
You cannot change the current of GPIO pin, that's not how it works.
If you want to know the maximum value of current for GPIO pins, this article says it's 16mA per pin, with maximum of 51mA for all pins.
I am a newbie here, I used and have my hand on arduino, but now I got task of taking 3000 samples of waveform with 100MSPS with an adc.
As this was impossible with arduino and most of the controller I switch to FPGA,
And bought NUMATO MIMAS v2 (As it has on board 512Mb DDR RAM, which is capable of handling that much fast operation.)
And also bought AD9283 along with it as it has 100MSPS 8bit adc output.
I am using Xilinx ISE, and using Verilog(No specific reason for it).
My PROBLEM is I am unable to interface that inbuilt DDR ram and communicate with it.
Means there are no tutorial to write on that ram and read from it.
So can any one could help me on it?
I think you can read some file from Xilinx about Spartan 6.Like ug416 and ug388 .
Then you can make a Example Design (tutorial) for your board to simulation and communicate with DDR on real board.It is describe in ug416 page 67.You do not code as you creat a MIG IP.It creat a test file automatic.After you simulaion and verify on your board you will familiar with MIG IP.You shoud make sure these questions in this step.Like How many write/read path you will use?How to manage command path?How to addressing?What's the frequency do you need?And so on.
At last you can use MIG by your demand.If you just has only one stream data you will use MIG very easy.Like just use one write path and one read path.
Forgive my English.
I have a a Sparkfun Max 7456 breakout board that I am trying to rewrite the character table to an ASCII format. I have been following the Arduino + MAX7456 OSD thread but cannot seem to load the .mcm file to the breakout board. I have tried hyper terminal and tera term. Tera term allows me to "transfer" the mcm file but I do not get any type of confirmation in the terminal window. When I try simple sample code like "Hello World.ino" I get no response and the default character set is still displayed. Hyper terminal tells me there is a COM port conflict with the Arduino IDE. I know the steps are available in the above mentioned thread but the picture/ code resources have mostly been removed. I don't know if I'm missing something in the code or if I am not using the terminal program correctly. I have the following connections between the breakout board and the Uno and have been trying Arduino code provided at the start of the thread;
Breakout/ Uno;
CS-->D10
SDIN--> D11
SCK--> D12
SDOUT--> D13
+5V
GND
I have tried using wires that are <5cm and >=10cm and I am using NTSC. Can anybody determine what I am doing wrong or point me in the right direction please. Thanks in advance,
I figured out my issue. Using Google translate I was able to get code from;
http://f5mna.free.fr/Arduiexpert.htm
Previously, I was only making the connections listed in the code when the full list is;
D13--> SCLK
D12--> SDOUT
D11--> SDIN
D10--> CS
+5VDC must be applied to the +5V pin on the board as well as a 1k resistor in series with LOS and a 10k with RESET.
As for using tera term. First shutdown the Arduino IDE and open the connection in the terminal program. The code provided in the above link will indicate it is ready for file transfer and will prompt you with a transfer complete message.
All in all, simple solutions but I was a newcomer to a very old thread. Hope this helps anyone else having the same issues in the future.
At first - sorry for my english
I need to read data from serial port (from GPS reciever)
I wrote a small app using SerialPort X2. It works.
But. I read data every 1 sec (on timer fire). And the recieving data is not very well. it could be without some first bytes or last bytes. So I need to read data from the "thread" (I did it when I wrote using Delphi in Windows).
I know that it could be using ObjC, but I am quit newbie in C
If someone have a small example (with tons of comments) on how to do it - it will be very helpfull
thanks
xCode 4, MacOSX 10.6