Arduino UART communication quandary

I'm trying to hook up a 5v Arduino to a 3.3v datalogger. I just realized that in all the time I have been messing around with micro controllers, I have never communicated serially to a device that wasn't 5V. I was about to just wire the two devices together when I thought better of it and figured I should look into the matter a little further. Can I just directly connect the RX pin on the 3.3V device to the TX pin on the Arduino? Or do I need to add a resistor in-between? Or a voltage divider? Actually, that wasn't all that many questions. Basically, I'm just wondering what is good form in communicating between devices of varying voltages?

Posted by randofo 10 years ago


CP2101 USB to serial IC

Sparkfun makes an excellent breakout board for Silicon Laboratories' CP2101 IC. It looks like this board could be used to connect a PC to your microprocessor through a USB port without having to use a MAX232 IC to convert the TTL voltage levels to the serial port voltage levels and then a USB to serial converter. Drivers are available so the PC sees the CP2101 as a COM port so hyper-terminal could be used to communicate with the microP. The 'S' in USB stands for serial, it should would be nice to connect a PC to a microP using only one piece of hardware. Am I right about the CP2101 providing this ability?Any opinions would be appreciated.

Posted by nolte919 9 years ago


Wi-fi print server question

I've seen these USB to Wi-Fi adaptors and I'm wondering if they act like wireless USB ports. The gist... I'm going to use a USB interface board and I want to know if I can use a wi-fi print server to make my control a robot via wireless. Any suggestions are welcomed.

Posted by ry25920 9 years ago


Intercom radio network with tree or more old landline phones?

Hi, me and my friends who live at a bording school, wold think it was a lot of fun, if we could make an intercom network so we could speak with each other, we have thought of making the network with tree or more old landline phones. anyone got some suggests?

Posted by sunes13 7 years ago


how magnetic induction data transfer from sensor happens ?

Hi, i want to know how data from sensor is transfered by coil through magnetic induction to another coil ? i know its range can be increased by relay coils but how to append data to the magnetic flux.. its really confusing . pls some one help me thanks in advance

Posted by rockindud 4 years ago


Implementation of two way communication

Hi, I'm working on a project where we're working on a tele-operated robot and we are looking to include the ability to have a conversation. We would be looking to use earbuds and a microphone on the operator side and a speaker and microphone on the robot side. Does anyone know how to go about implementing this? It needs to be hands free on both ends as the operators arms are being mapped to the robots arms. Thank you.

Posted by ArnoldM27 11 months ago


Search and communication software for multiple deep sea drones

Why, for clearly group drone work, like clearing mine fields and searching for an airplane lost at sea, don't we have software that can coordinate a group of drones to systematically work together to thoroughly search a programmed area and either blow up the mines or notify "command" of a "hit"?   I can also imagine aerial drones being used to search for lost hikers or for military purposes.                                                                                                                                                                                                                     Somebody can do this. 

Posted by Chrmngblly 4 years ago


Powerline communication

Hello I'm intrested in plc (powerline communiction) but I can't find specific schematics and / or "to the point" information. If someone can help me with information ect... or anything use full??  Thnx

Posted by geo bruce 6 years ago


Mobile pc communications

I'm not sure if this is the right place to post this so i'm sorry if its not. I am looking to control a set of switches using an old mobile phone connected to my PC. Sending a text message to the phone would let you do various things depending on the text message content. I don't even know if this would be possible but it is something I am looking to do and this seems to be one of the solutions (if possible) to what I need to do. If anyone else can help me with a way to control anything remotely without a wireless Internet connection, possibly even if its only 3G/EDGE/HSDPA Thanks

Posted by kaotix 9 years ago


can i talk to multiple arduinos at the same time with another arduino, in a serial format?

Hello all, I am trying to talk to multiple (say 4) microcontrollers (Arduinos) at the same time. I was wondering if i can setup a serial connection, with a selection line that can detect the neighbor Arduino and enable the corresponding pin to start the serial communication between the two. something like this:

Posted by karimskarim 3 years ago


soft serial communication on Arduino Micro.

Hello all, I have a few Arduino Micro units, and need to connect them together (in a mesh network) so that every unit in it is interchangeable, meaning that any unit may be in connection with more than one unit. As the Master/Slave form is out of question at this stage (because any given unit cannot be both Master and Slave at the same time, of course) I decided to go for a simple serial communication. However the Arduino Micro units (and frankly none of the Arduinos) do not have sufficient serial pins and I was advised to use Soft Serial instead. I was looking into the pin out of the Arduino Micro but cannot quite figure out which pins I can use for the serial comm.; I need 4 to 6 serial communications. Any help is much appreciated, as the nature of the problem may not be changed. So I need to solve it as it is. Karim.

Posted by karimskarim 3 years ago


peer to peer communication between Arduino Micros, serial? half-duplex?

Hello all, I have a few Arduino Micro units, and need to connect them together (in a mesh network) so that every unit in it is interchangeable, meaning that any unit may be in connection with more than one unit. As the Master/Slave form is out of question at this stage (because any given unit cannot be both Master and Slave at the same time, of course) I decided to go for a simple serial communication. However the Arduino Micro units (and frankly none of the Arduinos) do not have sufficient serial pins and I was advised to use Soft Serial instead. I was looking into the pin out of the Arduino Micro but cannot quite figure out which pins I can use for the serial comm.; I need 4 to 6 serial communications. If not Micro, what other Arduino (or any other solution) would you suggest? Each unit needs to have the following information ready at its serial ports: - its ID - its MAD - sensor value (analog or digital) Any help is much appreciated, as the nature of the problem may not be changed. So I need to solve it as it is. Karim.

Posted by karimskarim 3 years ago


Using Arduino For Communication Device?

Hi there, I'm currently working on a University project for my Final Year and currently have some proposed ideas for a social device which can be worn or attached to clothing. My plan is to create a device which sends messages or other information using a sender/receiver which then stores the information, ready to be read later either through USB or simply viewing it on the device itself. It may even work in a similar way to another, similar project I have found on Instructables (see below). The user would simply wear this item of clothing in a specific environment (such as a nightclub - speaking hyperthetically) which would allow communication between people just by walking past another person with the same device. Think of this as a close-proximity, P2P-type device for communication. https://www.instructables.com/id/Arduino-Lilypad-Interactive-Passion-Sensing-Scarf/ I have talked the project over with my peers and found that there are two main options to creating such a device, which are: - Use several Arduinos (one for each user) which send and receive information via RFID Readers/Writers (again, a set of each for each user) attached to the board. One problem with this is that it will be incredibly bulky and unlikely to survive being washed or put through the punishment that clothing often takes on a daily basis. - Use a central Arduino board which receives information from Arduino XBees which receive information from the central Arduino and are sent information back from it. One problem with this is when several devices come into contact with each other, the central Arduino will be unable to tell which message has come from and should go to another device. However, one plus point with this is that I've heard XBees (Series 2 only) will be able to send and receive information on their own and are incredibly small. If you have any ideas on how this device could be produced or if you have any comments on the above, please let me know. I would greatly appreciate any feedback you may have. Cheers, KugarWeb.

Posted by kugarweb 7 years ago


Mounting Science Museum Walkie Talkies to bikes

Hello, I have two Science Museum Walkie Talkies and I was wondering if anyone had any ideas for mounting them to bikes?

Posted by ShaunHill 10 years ago


cb

This is for all of you who still use cbs or are looking to install one for fun or work.  come on in and share ideas for mounting get ideas or just laugh at funny mounts.  i will put up more picks as i track down cars i have put them in.

Posted by abadfart 8 years ago


Serial communication between PC and picaxe 28X2

Hi, I am having problem in communicating with PC with Picaxe 28x2. Please help me in solving this problem as it is a very important project My aim is to send the values of w1 and w2 variables ( values of the ultrasonic range sensors 1 and 2 ) to the PC and display them with the help of VB my picaxe code is ..., #picaxe 28x2 main: pulsout C.1,2 pulsin C.1,1,w1 pause 10 pulsout C.2,2 pulsin C.2,1,w2 pause 10 sertxd(#w1,#w2) pause 100 goto main and my VB code is , Imports System.IO Imports Strings = Microsoft.VisualBasic Public Class Form1 Public Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Integer) Dim WithEvents serialPort As New IO.Ports.SerialPort Dim PicaxeRegisters(0 To 1) As Byte Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Timer1.Enabled = True Timer1.Interval = 5000 End Sub Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick Call SerialTxRx() End Sub Sub SerialTxRx() Dim labelstring As String = "" Label1.Text = "" If serialPort.IsOpen Then serialPort.Close() End If Try With serialPort .PortName = "COM1" .BaudRate = 9600 .Parity = IO.Ports.Parity.None .DataBits = 8 ' 8 bits .StopBits = IO.Ports.StopBits.One .ReadTimeout = 1000 .Open() .Read(PicaxeRegisters, 0, 2) .Close() End With For i = 0 To 1 labelstring = labelstring + " " + Str(PicaxeRegisters(i)) Next Label1.Text = labelstring Catch ex As Exception MsgBox(ex.ToString) Label1.Text = "Timeout" End Try End Sub End Class I have not included the write command, since I have not included qualifiers in the picaxe code. The Picaxe chip is sending the values ( I used the terminal in picaxe programming editor to realise this) but the visual basic is not displaying me the actual values sent by the picaxe chip. It is showing random values instead ... So i think that there is an error in the VB code. PLEASE HELP AS SOON AS POSSIBLE .. Thank You 

Posted by santhoshR 7 years ago


Will a 49MHz transmission work underwater?

I'm building a small device that needs to go to a depth of only a few feet in swimming pool water (I'd say three feet at the most) working on an arduino. I wanted to make it radio controlled and was planning on using a standard 49Mhz RC car circuit connected to the arduino. I don't want to keep the antenna above the water line and was wondering if a 49 MHz would work underwater.  I know higher frequencies like those in Bluetooth don't work underwater.Preview Topic

Posted by sidgupta 3 years ago


Full Duplex Wireless Audio

Hi, I'm in need of some help with a project I'm working on. I'm looking to build a handsfree two way audio communication circuit but I've been getting very confused when looking at material online and don't know where to look or how to even start. I've been looking into full duplex communication but I have no idea how to implement this in a circuit I could build. I'm confused as to if I would need a microcontroller (probably an arduino) or not and what transceivers and antennas to use. If anyone could show me where to look or help me get a starting point your help would be much appreciated. Thank you.

Posted by ArnoldM27 9 months ago


Café Twin Arts and Science Community Advisory

Http://cafetwinctv.blogspot.com/ Cafe Twin Community TV Show__ A Bridge to Music and Science with conversation and project development on a community level and via community twining as demonstrated post World War II in Europe with leadership from France and Germany Twitter ID: waldenthreenet

Posted by cafetwin 5 years ago


Annual Instructables Community Review

Hello, everyone, I would like to share with you my experience in this community for about 7 years of being a member here. Instructables members are very talented and very reliable also they are supportive. The community helps me to grow as an enthusiast in technology. This community is very educational. I really recommended this community for any makers around the world. I love being a member here and show what I made. I believe sharing is caring, so if we share each other's idea our world will be better for the next generations. I am lucky of being part of Instructables Community since 2009! (Wareneutron) P.S. Review this community by leaving a simple reply to this post! I hope everyone will share their thoughts and opinions or even feedback about this growing community of makers.

Posted by WarenGonzaga 1 year ago


Class assignment on the MAKE/Instructables community

I need the Instructables/MAKE community help with a class project. "To develop a persuasive argument in response to this question: "Are virtual communities, real communities?"" I decided to pick Instructables community, being that it is mostly online, making it a plausible virtual community. This community is also very open minded and sophisticated, and have no doubt that I will get plenty of input and good arguments. I hope can accomplish this and not sidetracked by all of the cool stuff the is always on the front page. So let the posting begin! Funny note, someone in my group picked myspace under the same prompt, that is going to be funny ass to see how that pans out.

Posted by sypher 9 years ago


Are there any community shops in the Vancouver bc area?

Hi. I am wondering if there any community shops in the Vancouver bc area? I have a couple projects that require large and expensive tools / machines that I cannot buy and store myself. I think that finding a community shop would be the best option.  Any help would be appreciated Professorred

Posted by professorred 6 years ago


OH MY GOODNESS I LOVE THIS NEW COMMUNITY SECTION!

I love this community section! ilove instructables, and i love craigslist, and this new for sale spot.... well, it combines the best of both worlds! yee baby. I love this site

Posted by alvincredible 10 years ago


Community Website design? Could Drupal be used and what would be the minimum modules to make it happen?

Community Website design? Could Drupal be used and what would be the minimum modules to make it happen? Could it be done with the basic installation? Could a step by step be done?

Posted by josheeg 6 years ago


Trying to join the community

Cannot successfully upload a jpg file so I can't participate in the community! I keep getting error messages from instructables. Any ideas what is going on folks?

Posted by Kspraydad 11 years ago


Community Built Ball Machine.

Hey guys and girls. I'm planning to build a community built ball machine. IE, YOU suggest the elements. I'll build the lift, but either show a picture of the element, or a link to where it is used, and I'll hopefully have it finished soon.So, any suggestions?

Posted by ajleece 9 years ago


Raspberry pi3 and drone communication with MultiWii Serial Protocol (MSP) API

I want to make line tracking with drone but i have some problem. the drone's control cart sent to data raspberry but raspberry can not sent to data. i tried communication with msp api but i didn't it. Please help me!!

Posted by isay1 5 months ago


Community Project Website

Hello All,  Recently, I came across this website for people to collaborate and create things for the community. I thought this would be a good place to share it. Many of us make things that benefit community, and we all have different backgrounds. This is a free website that we can post projects on, and can get crowdfunding. It seems legitimate, and is for sure worth a try. A friend of mine started the idea behind this website, if any of you guys have any ideas to work on in the community, you guys should give it a shot.    The website is: www.innovatebuild.org -rlingineni

Posted by rlingineni 4 years ago


Tesla's "magnetic wave" communications idea proposed for mine safety

A report in Science Magazine describes a proposal to use Nikola Tesla's magnetic amplitude modulation as a way for trapped miners to communicate with the surface.

Posted by kelseymh 8 years ago


Why did you join Instructables?

Just wondering what aspect of this particular DIY community everyone finds appealing. For me it is the non-curatorial structure, allowing the community to invent and publish the content and participate on our own terms.

Posted by pdip_stiffi 11 years ago


Community sections not displaying accurate info

I noticed that several community sections and topic lists are not displaying correct data. I don't want to sound like I'm nit-picking (because I really do like this site), so I hope staff takes this as an effort to improve things and not just as criticism. :) The following sections display incorrect data: (https://www.instructables.com/community) Community > Forums > Newsletter Archive (shows last post= 1 year ago, but last post was yesterday). Community > Help > Contests (shows 0) Community > Marketplace > Jobs & Internships (shows last post= 6 months ago, but last post was 4 days ago) The following sections do not display topics in the correct order based on most recent; Community > Marketplace > For Sale, Free Stuff, Jobs & Internships, Services and Wanted (only "Kits" is displaying correctly). Community > Help > Bugs and FAQ's Finally, if I may make a suggestion... I have noticed that when a new topic is posted, it does not show up as the "last post" as indicated on the root "community" page. Instead the "last post" is always based on comments. Too often, I think members are missing new topics because they are unaware that they exist if they are basing the activity of a section on the "last post". I think its worth considering that a change be made to reflect the "last post" by activity instead of by comment alone. Thank you for your efforts to make this community a great place to be. As I said, I hope my comments are taken as constructive and not just as criticism. 

Posted by canucksgirl 6 years ago


KNEX Community Contest

So, I thought it may be nice to have some community contest? We'd need some ideas and stuff, though, so what do you think? More discussion about this over here: http://knexflux.net/t57

Posted by Sorunome 2 years ago


Can you piggyback RF communications on cellular transmit/receive frequency bands ?

My question is purely hypothetical and there is no immediate plans for any such application. But I was just curious is it possible to make use of the cellular frequency bands (as set out by a country's regulations and by the cellular providers) for some sort of covert type communication other than for voice, data or text types of cellular communications ? Would it be too difficult and complex to develop such an application that uses cellular radio frequencies or could it be done without too much concern for potential interference or the sharing of channels of nearby normal cellular transmissions ? Could such an application be developed without having to cross over many hurdles ? If this covert communications is possible would the cell frequencies used not reach the base stations of the wireless carriers as noise or can a peer to peer communications be possible by passing the base stations ?

Posted by victor43 2 years ago


Just stopping in...

Hey everyone! I haven't really been active here on instructables for a while (I still do check it daily though!). I have been using a bunch of other forums lately (AndroidCentral, XDA Developers, etc...) and I have to say that instructables, BY FAR, still has always been the best forum experience for me. The community, the forum layout, the community, the "Public Profile" page, the community, and, oh, did I mention how awesome the community here was? I would like to commend everyone here for making instructables one of the best websites around. Great job! -Kcls

Posted by kcls 7 years ago


Where is your home?

Where are people in this community from? I am from the cultural wasteland known as Mississauga which is a yawn bedroom community outside of Toronto, Ontario.

Posted by Naomi2969 10 years ago


Halloween Bash – A Community Arcade

A mashup of Halloween and makers, celebrating community-made arcade games, with free trick-or-treating and a food drive. Part of the Bay Area Science Festival – it’s the perfect mix of technology, creativity and Halloween celebration. Community Maker Groups with large arcade games throughout the Center. Cardboard Challenge + Community Arcade game -making Station: You make the games, we provide the prizes! Saturday, October 25, 2014 noon – 4pm Bon Air Center Just off Hwy 101 on Sir Francis Drake Blvd in Greenbrae, CA

Posted by vkbonair 4 years ago


Building a communication device

Hey guys - I was wondering if anyone could point me to any instructables or other how-to's that teach you how to build a device that can communicate over the air over a given frequency? I've searched around a bunch but I can't really find anything. (I'm also completely stupid when it comes to this kind of stuff.)

Posted by holyjaw 11 years ago


Survey on the Workflow and Collaboration of Makers and Their Community

Im currently conducting research for my final year thesis which the aim is to identify insights gathered from this survey to understand the workflow and collaboration of the online and local maker communityMy aim at the end of this is to identify what could be beneficial for the maker community, whether it be in the form of a physical or online tool or even a set of guidelines to act as stepping stones during conceptualisation and prototyping for a user. You can answer the survey herehttps://goo.gl/forms/f2zjFwxyefxrKRpO2 This will be great help to get some participants and I hope my research and resources gathered will be a benefit to the online and local maker community.

Posted by Renegade Designer 2 months ago


The Instructables Community

Recently I was watching an episode of futurama (I dated a robot) where the characters enter the internet to download a celebrity. The point is, the internet there is like a mall. People actually come inside the internet.I was wondering, how would Instructables be presented here? And how about youtube?Any ideas how it would be?Looked like this:

Posted by Keith-Kid 10 years ago


Short Introduction:

Hello Community, I want to be a part of this community as I am new to this site. I am very happy to find this kind of discussion board. Thanks and Regards, Derren Brown

Posted by DELETED_DerrenBrown 5 years ago


Stuff won't show up in "tech"

Whenever I post something to the category "tech" in the community section, my topic doesn't show up! It shows up in other places, though.

Posted by mdj817 10 years ago


Knex Community: Twitter

Does anyone else in the community have twitter? Well, i do. I'll be giving updates on my knex projects. But PLEASE keep in mind that i also have a life. So i may be communicating with my friends, or things you don't understand, so PLEASE don't ask what on earth i'm talking about if you don't understand. I hate explaining inside jokes. Anyways! http://twitter.com/ajleece Why don't you post yours? Also, if you have facebook, add me! https://www.facebook.com/ajleece

Posted by ajleece 8 years ago


Researching DIY Projects, Cultures and Communities

We want to hear from you about Do It Yourself projects, cultures, and communities. Let your opinion matter! As researchers at Carnegie Mellon University, we are conducting a brief 10 min survey to further our understanding of DIY projects and communities. In the name of science (and for fun) please complete the survey located at the website below:http://tinyurl.com/DIYCommunitiesWe hope to share the collected data at the end of the study. We thank you for your time and effort.Stacey Kuznetsovstace@cs.cmu.eduEric Paulospaulos@cs.cmu.edu

Posted by staceyk 9 years ago


Instructables.com in the Classroom

Hello All, I have been in the Instructables community for the past 9 months on a personal account.  I currently teach computer technology to grades 5 and 6.  I had a thought that this community could be a great resource for my students to look for information and also share. My question to the community is this.  Is there a designated area of the site or community that is solely education based or are there groups of teachers that share how they use this site and contents in the classroom?  More specifically computer tech type classes. Hoping to hear back from some fellow educators. Regards, MyDemonsTech 

Posted by MyWlakeTech 2 years ago


arduino ultrasonic communication

I was thinking about using the ultrasonic  module (hc-sr04) for communication for two or more arduino.the way i was thinking of do to turn a 8 bit number into single bits(i have no idea on how to do that) and send them one at time(with delay) to a another arduino which turn it back into a number also  has a master arduino  and slave arduinos 

Posted by act casual 6 years ago


Community Project Idea

I had an idea that once a month, I (or anyone else) could post a list of materials. Then the community (you) could come up with ideas using some or all of the matierials. The person(s) who posted the original list of materials would pick the best or most reasonable project/idea, make it, and put up an instructable on it. Let me know whether it would be something anyone would like to do.

Posted by Ora 11 years ago


r/c and arduino communications

How do I check to see if my values for my reciever match the values in the r/c lawnmower code. It says if they don't to change them. But, I don't know how to check them.

Posted by mfm5024 8 years ago


welcome to me

Hi, i'm bigenner and you are a great community

Posted by Pikaubanitro 8 years ago


Some links are right-justified

.  Some, but not all, links in comments are right-justified and on a line of their own. I think this is happening when someone pastes a URL but does not make it into a link, but that's just a guess. Just a cosmetic bug; doesn't seem to affect anything but formatting. .  Here is a URL (not linked): https://www.instructables.com/community?categoryGroup=all&category;=all .  Here's one on a line by itself: https://www.instructables.com/community?categoryGroup=all&category;=all .  Here's a link: https://www.instructables.com/community?categoryGroup=all&category;=all .  On single line: https://www.instructables.com/community?categoryGroup=all&category;=all .  Hmmm. None of those do it in the preview. .  Win XP Pro SP3, FF 3.6.3

Posted by NachoMahma 8 years ago


Crowdfunding campaign MAKER @MIT | #FromMakerToEntrepreneur

Dear MAKERs community!My name is Dmitrii, I am also known for the Grow It Yourself (GIY) projectToday I launch the crowdfunding campaign #FromMakerToEntrepreneurThe campaign is aimed to raise funds for EDUCATION @MIT I strongly believe that this huge community that we have built together can have an impact! The support & share is truly appreciatedhttps://www.gofundme.com/FromMakerToEntrepreneur/Thank YOU in advance!

Posted by dymonxd 5 months ago