#171

[@sullivanzheng9586]

Good to hear our vblogger sharing his lifetime wisdom of having a happy & long lasting marriage.

[@AndreasSpiess]

:-))

[@Ikbenjanus]

One of those rare useful (very useful) content on KZbin. Thank you sir

[@AndreasSpiess]

You are welcome!

[@grigorigahan]

less than 24 hours and I'm back on this channel again. I just discovered videos of people reversing their remote's using a logic analyzer. So first stop here is learning this and and back on my old standby channel. Andreas really is a treasure to this community.

[@AndreasSpiess]

Thank you for your kind words!

[@walterbunn280]

I enjoyed this quiet a bit. Very cool. Since we're talking light, there is a method for discriminating different light sources that you might find helpful: All light can be polarized. Most people are familiar with polarized light be blocked by orthagonal filters, but, what they forget, is that there's a third level of polarization. That third level is 'color shifting'. Color shifting allows you to take one color of light, and turn it into another. To do this, you take two polarized filters at 90 degrees (such that they block most light coming through them), and simply add a third filter. The third filter shifts the frequency of light that makes it through the first 2 filterz. You can then check for color shifting in time with the 3rd filter or check for specific color of light keyed to your receiver/emitter combo.

[@AndreasSpiess]

Interesting! Never heard of this effect!

[@paparoysworkshop]

I found your channel via a comment you left at EEVblog and I'm glad I did. You have a new subscriber.

[@AndreasSpiess]

Welcome to the channel!

[@munjee2]

I have been searching for basically this for so long , all my KZbin searches got me no where , only showing me overly simplified, uninformative videos ,the when I'm not looking a day later it recommends me the perfect video when I'm watching a laptop review

[@AndreasSpiess]

Glad you found it!

[@martin.winkelhofer]

This episode was especially funny because of your comments about your wife's reactions :) I enjoyed it a lot! .. btw: now I'm building a "longer range" laser beam detector to detect human body movement inside a house with the capability to distinguish direction (2 close beams) and frequency carrier is a great help against various ambient light disruptions. Thanks for another good episode, Andreas.

[@AndreasSpiess]

Good luck with your lasers! If I remember I saw this technology in some action films. But they had more than two lasers there.

[@kelvynroberts9506]

Martin Winkelhofer Did you use the IR TX and TSOP RX? What was the max range between them? Are you still using it? Please, send me some details of this project [e-mail]

[@Hauketal]

About the IR-mode for the serial port at 15:00 IRDA is a protocol stack for IR data transfer, similar to bluetooth, but older. This probably switches the serial port into a mode compatible with IRDA lower protocol layers. For starters, have a look at the Wikipedia article.

[@AndreasSpiess]

I think so, too, but did not have the time to explore. And I also needed the higher (protocol layers)

[@smtjets]

And winner of my first comment on youtube is ANDREAS SPIESS the guy with the swiss accent... thank you for all your great videos! A few weeks ago I bought during a flashdeal on aliexpress a cheap esp-01 with a relay and ended here on your channel... 30 Years ago when I was building my first cnc router it was really complicated to get all the knowledge together and today we just google... BTW I remember in one of your videos… problems with a 3D printer....maybe Iˋm the man... we are almost neighbours.

[@AndreasSpiess]

Maybe you send me a short note on FB or Twitter if you live close by. Concerning the 3D printer, I got the good news that my new Prusa should arrive before Christmas...

[@smtjets]

Andreas Spiess ...I have no FB or twitter, check your mail @aru....

[@jinmingtang1545]

So logically exposing the history of the IR technique development!

[@AndreasSpiess]

:-)

[@umbertomurri9478]

A very useful and wide sight for who start to explore the IR basics and the IR communications

[@AndreasSpiess]

Glad it was helpful!

[@curtisoneill9929]

I love searching YT and seeing you in the results, I know ima get all the answers to questions I did think of, and didn't know to ask.

[@AndreasSpiess]

Indeed. I also use KZbin a lot for learning.

[@timfairfieldAETestandMeasure]

Fantastic explanation and well organized.Im working on a custom remote for my mom who is very old and is getting confused with the overcomplicated remotes. Ill just have on off and a few favorite channels on big buttons. Your resources here and explanation willhelp me save time.

[@AndreasSpiess]

Cool! I am sure she will be proud of her son.

[@2doritos]

huge thanks, i searched this for a school project and this video explains every detail

[@AndreasSpiess]

Glad it was helpful!

[@meetthefloccers8112]

Sir, thank you dearly for all your tutorials. I am new to ESP32 and have gained so much watching. I was needing to move IR receive to core 0 to get the update rate I needed. Would never have made it without your dual core video and your updated IR library. Thank you so much!

[@AndreasSpiess]

You are welcome!

[@meetthefloccers8112]

​@@AndreasSpiess Sir, I hope you would provide some additional guidance. I am having trouble getting a send. I have reviewed your git hub files and responses below. I just cant identify what output pin you are using for irsend? Is this GPIO3? There are several boards as you know. I bought an Adafruit HUZZAH 32 not a dev board. My mistake. The Adafruit board does not have GPIO3 wired out. Scouring through the library I can find the command identifying output pin assignments. Thank you for any assistance.

[@meetthefloccers8112]

@@AndreasSpiess Sir, thank you again for all your wonderful vids. I am sorry I bothered you, however, I did find the command. Opening up IRremote.h in Visual Studio made it easier to locate the line is 262 - byte timerPwmPin=15. I changed the value from 3 to 15. 15 is another PWM pin on the ESP32. Once again, thank you. I really love this little chip.

[@meetthefloccers8112]

Sir, like you I like to keep a happy wife. This IRsend was the final piece in an automated TV volume level mod I have been making. My wife hates the volume changing when commercials come on. I have made a hack for her using a mic input to a PID loop with time proportional output. I use the IR remote to change the setpoint of the PID. Then I average the mic input to get a smooth sound level reference. The PID adjusts the TV volume based on the setpoint, lowering the volume when commercials come on, or when she yells at me. If you raise or lower the setpoint the volume tracks with it. She is very Happy. Couldn't have done it without your vids.

[@javierunamuno6786]

Swiss humour at its best! And the same for the videos! Being more or less in the same age bracket, I can't realize how you or Pete Scargill can: buy the things, test them, make developments, write and modify libraries, shot videos, edit them, mantain a blog, mantain a marriage, answer the comments, eat, sleep? , and you are not even retired like the other great bald in Scotland/Spain.

[@AndreasSpiess]

Here our day has 24h. And if not sufficient, we have to work during nights ;-)

[@djtoddles8750]

9:00 I'm surprised the strongest word she used was "nerds"

[@grzesiek1x]

the best video I found on the youtube!!This is exactly what I needed! And you explain everything perfectly!! It proves also my theory that chanells with moderate number of views and without stupid addverts etc. are the best ones! Like yours!

[@AndreasSpiess]

Thank you!

[@johnburgess2084]

Thanks for the educational video.

[@AndreasSpiess]

You are welcome!

[@nathanpearson4600]

I love your videos Sir. I am looking to make a simple ir blaster to turn on and off a TV and stumbled upon yet another great video from the guy with the Swiss accent. Thanks for the info.

[@AndreasSpiess]

You are welcome!

[@tonysfun]

Hope you had a great trip! But today I'm playing with IR and your video was very helpful again! Thank you Andreas!!! Have a great week!

[@AndreasSpiess]

Unfortunately, the Pamir trip was cancelled because it was right at the border to Afghanistan. So Joe Biden was a little too fast for me :-(

[@tonysfun]

@@AndreasSpiess Now that is tooooooo bad! Hope you had a plan B or even plan C! But nice to hear from you! I don't trust some of these "??? countries" where you can disappear and nobody does anything about it! It's safer here or in our country and most Europe also, but going to some parts of the world isn't for me.

[@AndreasSpiess]

My wife and me will do a bicycle trip...

[@RETRODISTORT]

Amazing! I wanted to do this for a while, but I lacked the material and/or the time to test it Great video!

[@AndreasSpiess]

Thank you!

[@raguaviva]

Yet another amazing video! Interesting project, well organized and explained.

[@AndreasSpiess]

Thank you!

[@EJEuth]

Andrea’s I saw your video again, now by Dec/2022. The contents you present are already great, and adding your Swiss sense of humor is just a bonus for us.😊 At the original time, 5 years ago, ESP32 didn’t have code library for IR. By now, it may have and ATTiny85s or ArduinoPro mini could be the smallest versions to try IR coding experiments - not only in size, but also in Power Consumption. About my current project: In doing a DIY ‘project’ to control my Carrier/Midea’s split AC using a tiny and lower cost device as Arduino Pro Mini. Those AC devices use remote coded as “RG52B/BGCE” sending the full parameter set in a longer and more complex burst of IR codes. I have some doubts and don’t know if you could provide any guidance or comment: (1) Have you done (or heard someone) doing this long/complete IR coding for AC by the parameters themselves - instead of just recording hundreds of different combinatorial/configurations? Any guidance about this matter? (2) Developing some ‘smarter’ algorithms to read & learn the T&H sensor response and adjust the AC for better ‘Herman comfort’ - not just the dumb temperature control. Any references or similar cases are greatly appreciated. Thanks and Have a Great Christmas!

[@AndreasSpiess]

I did not look into IR recently. Maybe you find a project which fulfills your needs (we have no AC here). Merry Christmas to you, too!

[@EJEuth]

@@AndreasSpiess, curious piece of information that made me do a quick search. I live in Rio de Janeiro (Brazil) where cooling AC is more than welcome for our hot days’ troubles. It is a good guess that you live in Swiss, where diagonally you all could face cold days issues for several months/year. Options as burning wood/oil/gas fireplace are non-electric, sure. But the thermal machine known as “AC in heating mode” pumps more heat (BTU/Watt) than just resistive heaters do, which would compensate its cost and other disadvantages in the long run - except when electric energy and oil prices are skyrocketing.

[@verjikovskiy]

amazing tutorial - though still a lot of IR related questions

[@AndreasSpiess]

Google search is your friend ;-)

[@goku445]

Liked for the information, subbed for the humor.

[@AndreasSpiess]

Welcome aboard the channel!

[@moisescatala9964]

Thanks for your videos Andreas. I enjoy so much watching them

[@AndreasSpiess]

You are welcome!

[@BatonyRobson]

Wow, what a nice lesson) I haven't seen such for a long time) I love how you do it)

[@AndreasSpiess]

Thank you!

[@supremeleader5516]

Amazing video Andreas, well done

[@AndreasSpiess]

Thank you!

[@experiencingtechnicaldiffi5184]

I love this tech and find it very useful and try to use it all the time. However, for a simple cabinet door I would glue a magnet to the door and mount a reed switch under the shelf. Or you could mount the sensor at an angle so it can't see the remote. Or if the white cabinet makes that impossible just use a photo resistor since a closed cabinet is dark inside.

[@AndreasSpiess]

I went through your proposals, one after the other. For the reed switch, the distance was too far (without seeing the sensor when the door is open). The LDR did not work because in spring and autumn when the sun shines flat, enough light came in to switch the TV on and if the lights were low during the TV sessions it switched off. The video was already long so I did not mention these experiments...

[@experiencingtechnicaldiffi5184]

I have used both reed switches and LDR for closet and cabinet lighting to good effect. On one closet I mounted a magnet on a post on the hinge side of the door to reach under the shelf and find the reed sw. I have used the reflective sensors for part position and control on automated assembly machinery where magnetic and micro switches could not be used. Also as timing devices where I find hall effect units can be fooled by dirt and metal chips. If your TV cabinet door is manually operated it seems you have found the best solution. Maybe if I watch enough of your videos I will be able to think outside the TV box, too.

[@AndreasSpiess]

:-) Yes, the door is moved by hand.

[@joinedupjon]

I was thinking you were going to go for a good old microswitch... but at least the story had a happy ending :)

[@AndreasSpiess]

:-)

[@JanJeronimus]

Again an interesting video from Andreas !! I also am thinking about putting ESP's with IR send and receive (and perhaps also a buzzer and some other sensors) in my house. However if you have several of this IR home automaton interfaces near each other send IR only from one! The devices will receive signals from each other and the logic can become confusing. There are also much devices who use a IR power toggle code. This requires the home automation system to maintain information about the current state. Or you need to add other sensors (e.g. the power consumption) to check if the device is on or off.

[@AndreasSpiess]

1. As I mention in the video: You have to use an addressing scheme if you want to have several senders. Then, Node-Red can send an MQTT message to each of your senders, one after the other. Or the address is the delay each sender has to wait if it gets the MQTT message till it sends the IR signal... 2. Toggle codes suck. I do not like them at all because of the problems you describe.

[@Eger7law011]

Your humor for the dear woman in your life is funny. I am certain your being a innovative electrical engineer goes over into other parts of your relationship. Curious as to how much range infrared can travel? On approaching a gateway to a secured field a tractor or truck would automatically open from a distance of fifty meters. I would not want to have gate then left open but close in a short time with an override to keep it open should it be needed. Reliable and trustworthy are key elements for the not geek squad. Thank you.

[@AndreasSpiess]

I would not use reflected IR for 50 meters. Some sort of RF might be better for that.

[@wjhoogervorst]

Great video, just what I needed to be able to switch off my TV etc via my Home Automation via MQTT

[@AndreasSpiess]

Thank you!

[@JohnoScott]

Fantastic. You totally own the "nerd" claim and I love the humour in this one.

[@AndreasSpiess]

:-)

[@umbertomurri9478]

You are right when told: - it's not easy program Arduino to have 38 KHz - But I'm been more lucky than clever and after to have read much articles about the Timers/Counters inside Arduino I have reach a good result with these few rows (on Arduino Nano): define pwmPin 11 // IR Carrier 38 KHz PWM const long IR_CLOCK_RATE = 38000L; // IR Carrier 38 KHz PWM void setup() { TCCR2A = _BV(WGM21) | _BV(COM2A0); // PWM setup TCCR2B = _BV(CS20); // PWM setup - 38kHz carrier/timer OCR2A = (F_CPU/(IR_CLOCK_RATE*2L)-1); // PWM setup pinMode (pwmPin, OUTPUT); // PWM setup } // end setup void loop() { } // end loop My acknowledgements to - Hao Jiang - Ken Shirriff - Leonard Birchall -

[@AndreasSpiess]

Thanks for sharing!

[@frogembassy]

Great information especially the info about the esp32. FYI you could have saved your marriage sooner if you used a TOF detector for distance or HC-SR04, If you did then you would not have as good a story. Keep up the good work

[@AndreasSpiess]

Thanks for the tip!

[@daskasspatzle2396]

The easiest way would have been to throw the tv out of the house. Another easy way would have been to use a mechanical switch, reed contact or something like that. But your effort taking video was great ;-)

[@AndreasSpiess]

1. Maybe with the TV my wife would also go ;-) 2. As I wrote in another comment. I tried the LDR and the reed switch but was not successful in my particular situation I also wanted to use this example to show how to deal with some issues of the IR technology.

[@daskasspatzle2396]

And you excellently demonstrated it ;-)

[@spikeydapikey1483]

Happy wife, happy life ;o)

[@AndreasSpiess]

You are so right!

[@aymanfarouk7226]

Nerd

[@random_tek]

​@@aymanfarouk7226 friendly fire

[@SagaSeaCraft]

Another excellent vid, Andreas! Why not just use the uC's registers and masks directly rather than use the burdensome and low-performance arduino ide functions for generating the proper signal frequencies and duty rates? Almost any frequency generation is possible within very little cycle difference (error), which would not be an issue. Directly accessing the registers is not dangerous nor is it complicated when compared to the much improved abilities they give the uC. I do get it.... most ATmega 328p users are stuck forever in arduino-land, and you don't mind catering to the bigger crowd. I would think that most people would rather learn a bit more and really see what is happening and be able to do much more, without the arduino-blanket blocking their vision. The arduino ide still allows the use of all the registers, fuses, masks, and proper C and C++ instructions, etc, so if a person can't find the will to learn the basics of Atmel Studio in a few hour's time, they can still use the antiquated and pain-in-the-arse Arduino-ide without using the arduino's goofy, burdensome, canned functions. I suggest anyone reading this, and still using only the arduino ide, to go and download the Atmel Studio 7 and try it out before you let others convince you that it is too cumbersome and complex for you to understand and use to great advantage... AS-7 is so powerful and easy to use! And it provides so many more features to help you work faster and smarter. You don't have to learn all of it right away... in fact you most likely can't. It's a big place. But after using it for a while you will not want to go back to the toy-like arduino ide. Yes, the arduino ide has it's place, it's super simple, etc. But it's terribly lacking. Don't be ruffled by this comment. Just try it out. I double-dog dare ya. :)

[@AndreasSpiess]

1. I did assembler programming and other low-level stuff like that when I was young and like it that the computer took over this work for me (I still do it if absolutely necessary). 2. Arduino IDE is the standard in the maker scene, also because it can be used to program other MCUs like the ESP8266 or ESP32. An I go with a proverb from here: The fish has to like the worm, not the fisherman ;-) 3. Maybe you convinced some guys to try another IDE like Atmel Studio, or also Eclipse with your comment!

[@tracyscott3261]

Thank you. Your videos are very useful and interesting.

[@AndreasSpiess]

Glad you like them!

[@grzesiek1x]

After a few months of trying! Finally Eureka! I have increased the range like 1000 % !!! Hahahah! It was so easyyy though. Just the receiver doesn't like the long pulses and I have read the datasheet again. Now it works like Philips remote control :D with my own signal pattern.

[@AndreasSpiess]

Cool. Congratulations!

[@grzesiek1x]

@@AndreasSpiess Thank you :) It is already installed on my vehicule prototype :) Time will come also for RF inventions (but as it is much more complicated a little bit later).

[@Chaminox]

great video thank you! maybe use a limit switch for the tv door

[@AndreasSpiess]

Also a good possibility.

[@niceguy5772]

great work uncle im sorry if you are not old as a uncle or grandfather

[@AndreasSpiess]

I am 64. You you decide ;-)

[@battlecoder]

Wonderful video as usual! Now, I am not entirely sure about photodiodes always being black, and IR emitters always being transparent. I recall having several IR diodes that did not follow this "convention" and I specifically remember using a CMOS camera (normally a phone or a PocketPC) to find which ones were emitters. Receivers were tested later in the same way you tested them on breadboard, to make sure they were receivers indeed, and not just bad IR LEDs.

[@AndreasSpiess]

Thanks for your addition. I only had these on hand and it made sense to add a filter to the receiver, not to the sender...

[@SierraLimaOscar]

Yes, quite a few LED diodes (emitters) are also black. e.g. I bought some of these a while back: goo.gl/s66mhX

[@AndreasSpiess]

+SierraLimaOscar Your link says "Receptor de INFRARROJOS Receptor" which I think means receiver? The pictures also show the word "receiver"

[@SierraLimaOscar]

Oooops! wrong link, sorry! These are the one I meant goo.gl/WrPSRS. They are not as black as the receivers though (although in real life they look darker as in the pic).

[@anullhandle]

Those look like the everlight ones adafruit sells described as blue transparent. The receivers I've seen look black almost totally opaque. No idea why they tint the emitters. Narrow up the pass band, vis ID..?

[@asagk]

Actually you could use the IR-diode that is used for emitting light as a light receiver. Diodes are always light sensitive, instead of just emitting light, they can also be used to detect light. Only the sensibility is not very good. But that migth work for your example already, since the distance from the tv door to the LED installation is so little. Give it a try with just some diode, it also works with other colors, like green, yellow, red, etc. LEDs. They all have some small voltage between anode and cathode, as soon as light hits them. [edit] By the way, just to amuse your wife, how about a little magnet attached to the tv door and a hall sensor to detect that in position, when the door is closed? [another edit] Got it, your wife is already amused... :)

[@AndreasSpiess]

Using the same LED for transmitting and receiving would probably not work as the speed of light is pretty fast. Using a hall sensor would also have been a possibility.

[@asagk]

@@AndreasSpiess Na, dann wünsche ich mal einen schönen Sonnatg in die ferne Schweiz und viel Spaß mit dem Hall-Sensor... :)

[@craign8ca]

Greating from N8CA to HB9BLA !!

[@AndreasSpiess]

73 from my side!

[@norberthartmann5075]

wie ein schweizer uhrwerk ..... wieder sehr informativ - ich sage mal danke.

[@AndreasSpiess]

Das Uhrwerk ist aus dem Silikon Valley, nur der Inhalt is Schweizerisch ;-)

[@andrebernardmennicken4685]

Belgium-Malmedy, 2Dec2019 -- Very clear and fine presentation. I will check your other videos on that IR or Com Subject. Tks as it will be usefull for setting up an application of mine...that i hopefully can fix in Center of our Capital. Best Regards AbM3n.

[@AndreasSpiess]

I hope you will be successful!

[@tatavenugopal3082]

Super video ....Thank you Andreas

[@AndreasSpiess]

You are welcome!

[@jonanthony7709]

You have a great way of explaining things. I have IR control for TV and camera from ESP32. However I would to move from the Arduino IDE to the ESP-IDF as I want to use FreeRTOS.Any hints on the best way to use the IR code in the Arduino framework to ESP-IDF. Thanks again.

[@AndreasSpiess]

You can use RTOS also in the Arduino framework. I did a video about that.

[@evansuits4926]

For an old software guy, who is enjoying his retirement hours fiddling with microcontrollers, these videos are a Godsend. Thank you! Quick question: I notice that you often wear fabric gloves when handling components. Is this to reduce static buildup? Keep the components clean? Keep your fingers clean? All of the above?

[@AndreasSpiess]

Thank you for your nice words. The gloves only have a private reason, non-technical.

[@northshorepx]

Thank you Andreas and Mrs Andreas! Could we please have Mrs Spiess as a regular beta tester! She will help you add the real world wife acceptance factor (WAF) in future performance and cost spreadsheets. Joking aside this was a great video in your usual great style but I have a question please. How do you or other manufacturers ensure that their codes are unique so that they don't do something bad for instance switch on the heating (company 1) AND open all the windows (company 2) from a single IR transmission?

[@AndreasSpiess]

WAF :-)) I did not dig into the IR codes itself because I still had the remote to copy the code. So I do not know if there is any standard body like in Ethernet. I do not think so, but maybe somebody else knows.

[@northshorepx]

thank you!!!

[@JohnChrysostom101]

Yup like the sega pda and the casio watch you can use IR to text or send data

[@AndreasSpiess]

Cool!

[@cellularmitosis2]

Exactly the video I was looking for!

[@AndreasSpiess]

:-)

[@waltsteinchen]

Just thumbs up for this video Andreas! .. Still trying to reverse engineer the 'my-wife' application - whenever I think I found a coincidence that could help me to predict and influence further behavior - I have to find out pretty soon that I did not use the correct codes - my theorie is that the target uses lot's of self-modifying code .. ;:-)

[@AndreasSpiess]

This is always an excuse if we did not yet find the right rules ;-) Ich sage meinen Kunden immer, dass die teuerste Regel "Es kommt drauf an" ist. Sie kann kaum automatisiert werden und die Leute, die es für deren Anwendung braucht, sind auch nicht billig...

[@cody4128]

Any videos in the works for building a bigger longer distance IR array? Maybe a water tight enclosure to be mounted on the front of a vehicle?

[@AndreasSpiess]

So far I have no plans for that. But you never know ;-)

[@sallen135]

Your videos are amazing! It seems like every idea I have for a project I first check your channel and almost always can learn what I need from you. Are you saying your ESP32 IRremote github branch IRrecord sketch works with the esp32? If so, which pin do you use for the IR LED?

[@AndreasSpiess]

I do not remember the pin. But you see it in the sketch.

[@JS-do2ye]

Very nice. Would it be also possible to send Analog values via IR over short distances (e.g. 3cm).

[@AndreasSpiess]

Yes. But you have to convert them into digital values and back.

[@jtreg]

You are the best by far. Thank you!!

[@AndreasSpiess]

You are welcome!

[@frostgreen5527]

Nice video, entertaining and informative. 😀

[@AndreasSpiess]

Thanks!

[@CronaTheAwper]

14:08 "Somebody please explain me women." XD

[@AndreasSpiess]

:-))

[@toufikib9283]

brother that's a great work ♥

[@AndreasSpiess]

Thanks ✌️

[@johnjcb4690]

Oh boy i was looking for this

[@AndreasSpiess]

Glad you found it!

[@adwait_natu]

Very well explained! Thank you so much! Have you uploaded the code for your own code what you are talking about at 13:50 made on attiny85? If yes please let me know, im working on project where im facing same issue with other remote interfarrence

[@AndreasSpiess]

I do not think so. However it was very simple. Just create a few 1 and 0 and check if the receiver gets the same sequence.

[@SebaOPL]

It was very helful. Thank you!

[@AndreasSpiess]

You are welcome!

[@loicsamson914]

Very interesting ! I was just thinking on how to add it sending capabilities to a sonoff th10 or 16 in order to power control and send ir commands to some hifi équipement:-)

[@AndreasSpiess]

:-)

[@reeseyme9613]

perhaps a ultrasonic sonic sensor like those HC-SR04 will be better for the TV door project, its awfully easy to program it to detect in a specific distance and no worries on the ambient lighting issues.

[@AndreasSpiess]

You are right, this is another possibility.

[@empty0303]

This is so cool, thank you for sharing this video :)

[@AndreasSpiess]

You are welcome!

[@publicmail2]

Photo electric smoke detectors work by the coded IR beam being reflected by smoke not broken causing alarm.

[@chuckwilcox6997]

Interesting AD, so if you were to put a piece of paper or object close in the path of the coded IR beam (similar to the smoke) this would cause the coded IR beam to be reflected back to the photo electric smoke detector? So I imagine in close proximity a coded IR beam could detect objects that would not have to have the receiver and transmitter opposite each other like Andreas TV cabinet. Do you know how far reliable IR reflective sensing works in an outdoor environment? Thank you for your earlier comment and consideration of my questions.

[@Dialbist]

Is it possible to measure the density of smoke? with ir

[@ufohunter3688]

"Is it possible to measure the density of smoke?" www.sharp-world.com/products/device-china/lineup/data/pdf/datasheet/gp2y1010au_appl_e.pdf

[@Dialbist]

UFOhunter Yes, I know this sensor, but if it is constantly in the smoke, it will not clog?

[@publicmail2]

That is correct, hands free faucets too. Distance proportional to emitter power and reflectivity of obstacles. These uses are close less then a foot. Breaking beams can go 100s of feet.

[@joeybushagour2612]

Great video!

[@AndreasSpiess]

Thank you!

[@derisis13]

The Arduino runs at 16MHz, it should be capable of creating a 38 kHz pwm... The weak points could be the poorly written libraries. You could in theory set up a timer and achieve frequencies up to 8 MHz... Thought I think you need to code in assembly for that

[@PhilipBlignaut]

Great video!!

[@AndreasSpiess]

Thank you!

[@arlineandrews7619]

can we ask questions?

[@abinavnr5997]

Isn't that a question already?

[@fazalrahim9052]

Nop

[@wrongsideof40]

Hi - I just discovered this video. Fabulous! And you touch upon EXACTLY a little project I want to attempt myself; a CW keyer with an infrared link to the radio transceiver. The Is there much more circuitry required to turn the 'hi/lo' from the IR receiver into something that will key the rig? Any pointers much appreciated. *****It's the next day, and I only just realised that if I want to put the IR link between the paddle and the keyer (or rig with built-in keyer) I need TWO IR links; one for dits and one for dahs. So as well as, say, the 'standard' 38kHz link, do I need to choose the other link's frequency as far from 38kHz as possible or can I use any other freq than 38kHz? Thanks

[@AndreasSpiess]

You could code the IR signal (one code for the left and another code for the right paddle. You get IR receivers for other frequencies. But I do not know how sharp their filters are.

[@RealEngineer]

As always a quality video :)

[@AndreasSpiess]

Thank you!

[@ytfp]

I think for definitve it would be nice if you explored how fast you can exchange real data. Explore speed vs distance of ir pair as well as different times of day. Try to see how far you can exchange a file perhaps and write this file to sd card.

[@AndreasSpiess]

You are right. I thought, most people use IR for the scenarios I mention and not to transfer real data.

[@TheGTP1995]

To transfer real data you should implement a proper protocol to manage transmission errors, and at this point the speed will also depend on the protocol. You can have a look at HDLC, a protocol used for point-to-point connections beetween computers.

[@marsim4150]

finally no noise in hearphones !!! :-) thank you

[@AndreasSpiess]

Thanks for your feedback. I did not change anything. Hopefully, it will stay like that...

[@YusufBAYLAV]

Hi @Andreas Spiess, re-watching your videos an idea came in mind, but could not be sure about a thing and wanted to contact you. You're declaring that it's possible to prevent day light from tricking IR receivers. I'm thinking about creating a robotic pan tilt mechanism, which follows only an IR emitter. I mean if not please suggest me some technology. I'm fed up with my motorcycle mirrors change their angles because of the wind. And as I go faster I need to bend my head in order to resist the wind and supply some aerodynamics. This results with the fact of losing my mirror vision. I'm now searching for a technology which will let me to 3d print a pan tilt mechanism to arrange my circle shaped mirrors angle relatively to my heads movement. I do not want to lose my vision in any case. Could IR be this technology? Could you advise me?

[@WayneTheSeine]

Brilliant. Every helpful. Thank you.

[@AndreasSpiess]

You are welcome!

[@kakopappa]

I use irdevkit to learn and send. It is lot easy

[@AndreasSpiess]

Thanks for the tip!

[@IanWilkinson-SgtWilko]

Another excellent video! Out of interest, as you seem to fix a lot of libraries, do you tend to send pull requests back to the original repository with the fix? I often want to use a thing you've fixed but don't know if the original repository (which quite often has moved forward since your video) includes your fixes.

[@AndreasSpiess]

So far I did not send it back. Maybe I will do it with this library.

[@backlash00]

In cases where propagation time is important, what's the best I can expect to see in a low to high transition at the transmitter to a low to high at the receiver output. No mechanical relay, to slow.

[@AndreasSpiess]

Propagation of light is 300'000km/sec. More important is the protocol and the transmission speed you use. I did not do measurements for that purpose. Maybe google knows?

[@avejst]

Thanks for sharing 😀👍

[@AndreasSpiess]

:-)

[@2112user]

Love the video! Came here searching for a lesson just like this, in hopes of undersanding why another program (Iaqua controller) isn't working with my lights, and got humor too :) I did have a question on the code (IRMQTT_ESP32). I'm trying to use it on an arduino but after some errors due to missing library files (or wrong ones) I'm stuck on an exit status 1 for no matching function for call to 'IRsend::IRsend(int&)' Is this another library issue, and if so, which one?

[@AndreasSpiess]

The ESP32 uses different libraries than the Arduino. You have to use the Arduino libraries for that. But you anyway will need connectivity (Internet). I do not work with Arduino in such scenarios so I do not know which libraries should be used

[@2112user]

Thank you for the info, I'll see if I can get it going. I do wonder, is it possible to have one send command transmit more than one code? For the application I'm looking at, I need to press 3 buttons to turn a light on and get it to the lighting I'd wish to use. Can a program be made to send 3 codes with a delay between them, using one time trigger or line?

[@q12x]

very nice !

[@AndreasSpiess]

Thank you!

[@middleaged-downhiller]

Did you try to use the RMT of the ESP32 for IR yet? That would be very nice to have...

[@AndreasSpiess]

No, I did not because I did not find a library yet. Implementing all the protocols is not an easy task and the reward would probably not be big. Maybe somebody will port one of the libraries to this technology.

[@patrickd.115]

Hallo Herr Spiess. Vielen Dank für die sehr gelungenen Tutorials. Wäre es denkbar ein Video über das Auslesen von 2.4 GHz Fernbedienungen zu machen?

[@AndreasSpiess]

Die sind rar und deshalb würde ein solches Video nicht geschaut :-(

[@patrickd.115]

Okay. Ich habe hier schon zwei Stück liegen :). Danke dennoch für die Antwort und mach weiter so. 👍🏼

[@PatrizioBekerle]

Great video, Andreas! I wonder if your would have made your wife happier more quickly if you had used an ultrasonic range detector. :)

[@AndreasSpiess]

I am not sure if she would hear the difference. She has about my age and we do not hear any more high frequencies ;-)

[@bfx8185]

Its very useful and funny:) Thank you!

[@AndreasSpiess]

You are welcome!

[@richard_wenner]

Of course there are also Apps that will fire IR from your mobile too - even more functionality. :)

[@AndreasSpiess]

You are right. I saw these dongles. Creative idea. I think they are not often used because they block the headphone jack. And the new iPhones even do not have one anymore...

[@richard_wenner]

No additional hardware needed - it's all already built in. www.tomsguide.com/us/pictures-story/494-android-tv-remote-apps.html

[@AndreasSpiess]

The video says: "Turns your blaster equipped smartphone..." Unfortunately, not many are equipped with this feature en.wikipedia.org/wiki/List_of_devices_with_IR_blaster . And my iPhone for sure not...

[@richard_wenner]

Come on over to the free and open world - free yourself of the Apple shackles. :) You won't have seen or used 'Tasker'. ( tasker.dinglisch.net ) This is as close to 'root-kitting' your Android phone as it is possible to get and unleash the real power of the phone.

[@AndreasSpiess]

You definitively are right with tasker. But as a citizen of Great Britain, you should also understand the value of "tradition" ;-)

[@LowtechLLC]

Dude, you rock!

[@AndreasSpiess]

:-)

[@chuckwilcox6997]

Andreas an excellent video and well researched. Incredible quick turnaround on bringing something insightful and new to video. Did you determine the range of an IR beam transmits reliably to a receiver and did you discover what the maximum reliable distance for reflective transmission was, ie like the TV cabinet setup? I'm considering external passive IR with fresnel lense as they are low power, but your video has given me a few other ideas. Again, brilliant work :)

[@AndreasSpiess]

I think this is more an optical question and I do not know a lot about lenses. In my lab, the IR detector chips were very sensitive. I do not know how they would work on the outside with bright sun. I assume, they would go into saturation quickly and would no more able to detect the small signals of an LED.

[@chuckwilcox6997]

Mmm, yes I expect the IR chips will be saturated by natural daylight IR and yes an optical issue. Thank you for your response.

Hello Andreas, thank you for this vídeo, could be share the node-red flow you use in this tutorial please. Thanks again.

[@AndreasSpiess]

Should be on Github by now

Thank you Andreas!

[@OthmanAlikhan]

Thanks for the video, very advanced =)

[@AndreasSpiess]

You're welcome!

[@Jhinsydney]

Brilliant!!!

[@AndreasSpiess]

Thank you!

[@ct3sibius]

You save my day. Thanks.

[@AndreasSpiess]

You are welcome!

[@colmaniot6331]

Dear Andres thank you for the comprehensive explanations. I am trying to use the IRSendDemo with ESP32 (WROOM-32 1313) and not sure how to interpret the comment " An IR LED must be connected to Arduino PWM pin 3", pin 3 is RX0 in this board pinout. Should it be TX0 (sadly not working), what is the proper pin to connect in order to send IR codes using your examples (or the ESP32 Compatible examples from your github) ? Thanks.

[@AndreasSpiess]

In the sketch the pins are defined as follows: int RECV_PIN = 14;int SEND_PIN = 5; No pin 3

[@ljl451]

But after you decode the IR codes of the remote controller you want to copy, you also need to choose a specific IR send method (manufactory dependent) to send out the codes. Correct?

[@AndreasSpiess]

Yes

[@thesimbon]

To detect if the TV door was open or closed I would have probably choosen a reed switch attached underneath the shelf and a magnet behind the door. Since you are using esp8266 there is very nice library for it with already all codes from many manufacturers. If you want to take a look at my simple MQTT IR remote here is the link forum.mysensors.org/topic/8018/mqtt-ir-remote

[@AndreasSpiess]

Thanks for the link. Because I also have an IR receiver I did need a list of codes. But if you lost your Remote or if it does not work anymore this is a good thing...