Can't find TSO4838 device

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dynamicdave
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Can't find TSO4838 device

#1 Post by dynamicdave » 24 Sep 2018, 14:11

Hi,
I'm trying to find the "Device" dropdown to interface with the IR receiver TSOP4838.

I'm currently using mega-20180924 Normal and Test version.

Does anyone know which version of ESP Easy the IR receiver can be found???

Kind regards from David

Shardan
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Re: Can't find TSO4838 device

#2 Post by Shardan » 24 Sep 2018, 14:15

Try the IR version.

There's a separate version for IR now as the IR-Library gets too big.
Regards
Shardan

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dynamicdave
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Re: Can't find TSO4838 device

#3 Post by dynamicdave » 24 Sep 2018, 14:38

Thanks for your swift response.

Now why couldn't I see that version/entry in the release I downloaded today??

Might be time for an eyesight test !!!!

Thanks again.

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Re: Can't find TSO4838 device

#4 Post by dynamicdave » 24 Sep 2018, 19:34

Hi Shardan,
Do you know if the TSO4838 should respond to a TV remote??

When I used to use the old TSO1838 devices (many years ago with PIC microcontrollers) I had to fire an IR beam that was modulated with a 38KHz carrier.

Does the TSO4838 work in the same way??

Kind regards from David.

Shardan
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Re: Can't find TSO4838 device

#5 Post by Shardan » 24 Sep 2018, 19:54

Hi David,
atm i have to pass out on this.
The TSOP4838 uses 38KHz... TSOP48 is the type and "38" the frequency.

With the old R148 ESPEasy I used an arduino with a TSOP 4838
to read the IR remote and (hopefulls..) get back a usable code.
A description of the settings and commands is in the wiki: https://www.letscontrolit.com/wiki/inde ... /IR-Remote

Due to lack of time I didn't do anything with the new IR-binary yet so
I can't say how it works and which values are returned.
Regards
Shardan

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dynamicdave
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Re: Can't find TSO4838 device

#6 Post by dynamicdave » 14 Jan 2019, 10:24

I've just been trying to get a TSOP4838 IR receiver working with ESP Easy.

I'm using the IR version of mega-20190109.

Has anyone managed to get the IR receiver working and if so, with which firmware version?

Kind regards, David

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Re: Can't find TSO4838 device

#7 Post by dynamicdave » 14 Jan 2019, 18:59

Responding to my own post - that's strange.

Well I have made some progress - I made a small test circuit (without using a Wemos, just an LED and a resistor) and discovered the TSOP-4838 doesn't seem to work off +3.3V supply only 5V.
The datasheet says it should work on +2.7v to 5.5V.
I then made up a breadboard with a Wemos and powered the TSOP-4838 from the +5V connection.
I made up a down level shifter using a couple of resistors and finally got number-strings coming out of the device.

If I allow a short delay or break between pressing a button on the remote IR controller, the number strings seem fairly repeatable.
If I press the button quickly then I get a different number-string each time.

Well at least I've made progress.

Shardan
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Re: Can't find TSO4838 device

#8 Post by Shardan » 15 Jan 2019, 18:42

Hi Dave,

take a look at

https://letscontrolit.com/wiki/index.ph ... /IR-Remote

That's the IR transceiver i've designed some time ago... still working on an old R148 Version
as I didn't find the time to change to new version including adaption of my FHEM config.
Regards
Shardan

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