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Arduino•2mo ago

Help with IRremote library | sending:

Hello. Firstly I apologise I am extremely new to arduino IDE. I am not sure if this is the right place to post my support request hopefully its okay. My intention: I wish to send just a single command over my IR diode, the sample code I find that comes with the library seems to just send on repeat which I am not sure how to stop firstly, I have managed to stop the sample code from interating by commenting that code out. I have the remote codes using the IRremote library for receiving okay. My issue: I am not entirely sure where to put my send code, I have tried various places. Code: Due to limitations of thread character limit I've had to upload to github - https://raw.githubusercontent.com/HybridZach/HybridZach/refs/heads/main/SimpleSender_IR_C6.ino The readme on the github which links to documentation here - https://dronebotworkshop.com/ir-remotes/#SimpleSender_Example_Code With regards to where to change the command I am a bit lost. The receiver gave me this for example for a UP button

 Send with: IrSender.sendNEC(0xE710, 0x15, <numberOfRepeats>);

 Send with: IrSender.sendNEC(0xE710, 0x15, <numberOfRepeats>);

So I assumed you change that line but it didn't work. I see the IR working (looking at it via a camera) so I've defined the pin correctly with the compile options, I'm just stuck on where to place the send code. Thanks.

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71 Replies

AnonEngineering•2mo ago

there are many, many IR protocols in the world, you must use the one your receiving device expects. you "see" the IR with your cell phone, so likely the code being sent isn't what your receiver expects

HybridZachOP•2mo ago

No I know its NEC protocol I have the code from using the receiving demo code. I now want to apply that to the send demo code but I don't know where to replace it. The receiving demo says this:

23:01:29.513 -> EA15E710
23:01:29.513 -> Protocol=NEC Address=0xE710 Command=0x15 Raw-Data=0xEA15E710 32 bits LSB first Gap=3276750us Duration=67450us
23:01:29.513 -> Send with: IrSender.sendNEC(0xE710, 0x15, <numberOfRepeats>);

23:01:29.513 -> EA15E710
23:01:29.513 -> Protocol=NEC Address=0xE710 Command=0x15 Raw-Data=0xEA15E710 32 bits LSB first Gap=3276750us Duration=67450us
23:01:29.513 -> Send with: IrSender.sendNEC(0xE710, 0x15, <numberOfRepeats>);

So where do I place the send with code in the send demo code? What I meant by I see it in my phone camera is I must have the correct pin defined for the send pin as I see its sending IR signals fine I just need to send the right command

AnonEngineering•2mo ago

currently you are sending

c++
IrSender.sendNEC(0x00, sCommand, sRepeats);

c++
IrSender.sendNEC(0x00, sCommand, sRepeats);

once a second and you defined those variables up top

c++
uint8_t sCommand = 0x34;
uint8_t sRepeats = 0;

c++
uint8_t sCommand = 0x34;
uint8_t sRepeats = 0;

0x00 is the address, which doesn't match NEC Address=0xE710

HybridZachOP•2mo ago

Yeah so I replaced that with

 IrSender.sendNEC(0xE710, 0x15, <numberOfRepeats>);

 IrSender.sendNEC(0xE710, 0x15, <numberOfRepeats>);

And the github says if unsure what number of repeats set to 3 as a start My problem is the console shows that its not sending the correct command (I think?) My output:

01:46:24.861 -> Send now: address=0x00, command=0x34, repeats=0
01:46:24.861 -> Send standard NEC with 8 bit address

01:46:24.861 -> Send now: address=0x00, command=0x34, repeats=0
01:46:24.861 -> Send standard NEC with 8 bit address

Am I replacing line 72 in my code linked above? Sorry I send that before reading your other reply So to change the command I change these?

AnonEngineering•2mo ago

try

c++
IrSender.sendNEC(0xE710, 0x15, 3);

c++
IrSender.sendNEC(0xE710, 0x15, 3);

that is "hard coded", not using the variables

HybridZachOP•2mo ago

Oh I see Also how do I only send it once?

AnonEngineering•2mo ago

most IR codes want a repeat for reliability

HybridZachOP•2mo ago

Its just while I test the output so I don't spam the console every second

AnonEngineering•2mo ago

that's two different things, how many times the code is repeated, and how often you send results to the serial monitor

HybridZachOP•2mo ago

This is what I tried before I asked for help and my output says its sending the wrong command?

AnonEngineering•2mo ago

🤷‍♂️ wrong command for what?

HybridZachOP•2mo ago

Sorry for noobie let me try start again I changed line 72 to what you put here

AnonEngineering•2mo ago

the github isn't showing line numbers, you could try pastebin.com

HybridZachOP•2mo ago

When I run the code the console says this

01:46:24.861 -> Send now: address=0x00, command=0x34, repeats=0
01:46:24.861 -> Send standard NEC with 8 bit address

01:46:24.861 -> Send now: address=0x00, command=0x34, repeats=0
01:46:24.861 -> Send standard NEC with 8 bit address

Sorry replying using my phone

AnonEngineering•2mo ago

if you use variable name those values would be used

c++
IrSender.sendNEC(address, command, repeats);

c++
IrSender.sendNEC(address, command, repeats);

(whatever names are defined)

HybridZachOP•2mo ago

Lemme give you the correct link one sec

AnonEngineering•2mo ago

ok, brb

HybridZachOP•2mo ago

https://github.com/HybridZach/HybridZach/blob/main/SimpleSender_IR_C6.ino

GitHub

HybridZach/SimpleSender_IR_C6.ino at main · HybridZach/HybridZach

Config files for my GitHub profile. Contribute to HybridZach/HybridZach development by creating an account on GitHub.

HybridZachOP•2mo ago

I suck at CPP only good with python. Struggling to find where I change the sample code to run the command here

AnonEngineering•2mo ago

so as written it executes

c++
IrSender.sendNEC(0x00, 0x34, 0);

c++
IrSender.sendNEC(0x00, 0x34, 0);

c++
uint8_t sCommand = 0x34;
uint8_t sRepeats = 0;

c++
uint8_t sCommand = 0x34;
uint8_t sRepeats = 0;

yes, line 72 so you could hardcode address, command, repeats there

HybridZachOP•2mo ago

Sorry for the confusion that code I linked I replaced line 72 with

IrSender.sendNEC(0xE710, 0x15, 3);

IrSender.sendNEC(0xE710, 0x15, 3);

AnonEngineering•2mo ago

not what I see at https://github.com/HybridZach/HybridZach/blob/main/SimpleSender_IR_C6.ino 🙂

HybridZachOP•2mo ago

Sorry I know I'm trying to explain that what I linked you I changed that line with the above

AnonEngineering•2mo ago

ok, and what is complaining about that editied line?

HybridZachOP•2mo ago

So I change line 72 what about line 54 & 55

AnonEngineering•2mo ago

those lines set up the variables

HybridZachOP•2mo ago

The console output it saying (I think) that the wrong command is being sent Address 0x00 command 0x34

AnonEngineering•2mo ago

what console? an ino script, a python script? how would the console know it's the wrong command?

HybridZachOP•2mo ago

The serial monitor in the ide The code in the loop is meant to display the command it sent

AnonEngineering•2mo ago

i don't see any receive code or any lines that would send an error message

HybridZachOP•2mo ago

I suck at explaining 😅

AnonEngineering•2mo ago

all i can go by is the link you sent 😉

HybridZachOP•2mo ago

So in the loop it says in a comment Print current send values

AnonEngineering•2mo ago

// comments are not compiled let alone executed

HybridZachOP•2mo ago

No lmao that's not what I meant Ermm

AnonEngineering•2mo ago

this block?

c++
    /*
     * Print current send values
     */
    Serial.println();
    Serial.print(F("Send now: address=0x00, command=0x"));
    Serial.print(sCommand, HEX);
    Serial.print(F(", repeats="));
    Serial.print(sRepeats);
    Serial.println();

c++
    /*
     * Print current send values
     */
    Serial.println();
    Serial.print(F("Send now: address=0x00, command=0x"));
    Serial.print(sCommand, HEX);
    Serial.print(F(", repeats="));
    Serial.print(sRepeats);
    Serial.println();

HybridZachOP•2mo ago

Yeah

AnonEngineering•2mo ago

it's hardcoded, it'll always print that

HybridZachOP•2mo ago

I think I'm being dumb I thought it had variables to display but the first line is hard coded text Ditto

AnonEngineering•2mo ago

yes you could use variables...

HybridZachOP•2mo ago

How do I get it to display that its sent the correct code Are variables in a text string defined with $? I just want the console to show what command was sent

AnonEngineering•2mo ago

looking again

c++
    Serial.print(F("Send now: address=0x00, command=0x"));
    Serial.print(sCommand, HEX);

c++
    Serial.print(F("Send now: address=0x00, command=0x"));
    Serial.print(sCommand, HEX);

will print sCommand (in hexadecimal) in C++ you should avoid "text strings", they are char arrays, an array of characters

HybridZachOP•2mo ago

Okay lemme test some things and get back to you to see if I get the desired outcome. Thanks for helping such a noob lol

AnonEngineering•2mo ago

though in this case they are 16 bit unsigned integers (uint16_t) C++ is very picky about data types 🙂 oh. potentially a problem, they are created as 8 bit integers... (uint8_t) 0xE710 is 16 bits the original repository and examples are here https://github.com/Arduino-IRremote/Arduino-IRremote

HybridZachOP•2mo ago

Yah I struggled to understand the examples/readme So on line 54 it is setting up sCommand as the correct data type? The example is 0x34 are you saying I need it to be 16? Also running the code and holding the ir near what I want affected it doesn't work sadly

AnonEngineering•2mo ago

0x34 is only 8 bits, which might be ok for address, but data is 16 bits iirc

HybridZachOP•2mo ago

So what do I need to change that to

AnonEngineering•2mo ago

uint16_t is an unsigned 16 bit integer, uint8_t is an unsigned 8 bit integer each character in a hex value is 4 bits (a nybble), 2 nybbles is a byte 16 bit is 2 bytes 0xE710 is 4 nybbles, 2 bytes, 16 bits

HybridZachOP•2mo ago

So I need to change uinit8_t to 16? Would you be able to edit my ino to send the command the receiver gave me so I can use that as an example to try understand it better perhaps?

AnonEngineering•2mo ago

do you have a device to control? I'd need to study the NEC (or whatever protocol) to know what you should be sending

HybridZachOP•2mo ago

Yeah my AC It came with a remote and I sent the codes with the receive demo file which worked fine I just can't figure out how to send what it gave me lol I thought ir send and receiving would be simple 😅😭

HybridZachOP•2mo ago

This is a file I made with the various buttons I sent to the ir receiver with the IRremote ReceiveDemo

AIRCON.txt

AnonEngineering•2mo ago

ac's use a different protocol, not NEC https://github.com/Arduino-IRremote/Arduino-IRremote/blob/master/examples/SendLGAirConditionerDemo/SendLGAirConditionerDemo.ino as an example Raw-Data=0xEA15E710 32 bits LSB first

HybridZachOP•2mo ago

Well the receive demo said it should spit out and decode what protocol it uses Which gave me NEC

AnonEngineering•2mo ago

and it reports a 32 bit protocol there is no "standard" way to send and receive IR

HybridZachOP•2mo ago

It says protocol=NEC

AnonEngineering•2mo ago

i'd read through https://github.com/Arduino-IRremote/Arduino-IRremote?tab=readme-ov-file there may be better tools to read your ACs remote

HybridZachOP•2mo ago

Haven't I already read the commands though I just need to send now?

AnonEngineering•2mo ago

the tool you're using may not truly understand what it's seeing so it makes its best guess might be simpler to start with a TV, they use more "standard" protocols

HybridZachOP•2mo ago

My whole goal is to control the AC though haha. I bought a IR send and receiver with an esp dev platform eventually I want to hook that up to home assistant to control my ac. I'm just using audino to decode the commands first because I thought I'd be simple. I guess I was mistaken lol Can you help me try test the commands I got though?

AnonEngineering•2mo ago

"We love standards, that's why we have so many of them" 😉 https://github.com/Arduino-IRremote/Arduino-IRremote?tab=readme-ov-file#how-to-deal-with-protocols-not-supported-by-irremote your goal is fine, but when setting out to design a Boeing 747, it's best to start with a Cessna 172, in other words, try to control a more standard thing first

HybridZachOP•2mo ago

I used this https://dronebotworkshop.com/ir-remotes/#SimpleReceiver_Example_Code to decode the commands and it spit out that it uses NEC

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IR Remotes Revisited - 2023 | DroneBot Workshop

Learn to interface infrared remote controls with microcontrollers like Arduino and ESP32. Includes those tricky remotes as well!

HybridZachOP•2mo ago

This links to that Why is it so complicated lmao oof

AnonEngineering•2mo ago

yes but ACs don't use NEC. think of protocols as languages, if i try to decode French but I only know German, the results may not be good

HybridZachOP•2mo ago

But the irremote readme says If you have a device at hand which can generate the IR codes you want to work with (aka IR remote), it is recommended to receive the codes with the ReceiveDemo example, which will tell you on the serial output how to send them.

AnonEngineering•2mo ago

this concentrates on TV remotes https://dronebotworkshop.com/ir-remotes/

HybridZachOP•2mo ago

Doesn't that tell me what its using so are you saying its guessing its nec

AnonEngineering•2mo ago

it is listening for a more standard protocol, it hears Swahili so it takes its best guess i'd google up "Decode AC remote", I myself have never used IRremote with an AC

HybridZachOP•2mo ago

The ac isn't a big named brand I'd doubt it to use something special

AnonEngineering•2mo ago

LOL that makes it more likely it has a custom protocol there are examples in the links above for LG air conditioners https://github.com/Arduino-IRremote/Arduino-IRremote/tree/master/examples/SendLGAirConditionerDemo

HybridZachOP•2mo ago

Hmm this is way over my head then it seems Thanks for the help anyways

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