Re: Raspberry PI: Bypassing IR TX/RX

Bengt said, 
    >>Make sure that you are using  a driver that can handle unmodulated signals; I do not know the status  of the current RPi stuff
Please clarify, how do I make sure about the driver. If the Raspbian Stretch kernel does not have specific support for the feature, is there any wayto use PWM  GPIO pin (instead of any other output pin) and use FREQUENCY 0 in the lircd.conf?
I greatly appreciate any help bypassing IR TX/RX (since RPI and the target board is in same enclosure).
Best Regards,Raj
   On Sunday, March 15, 2020, 12:32:37 PM CDT, Bengt Martensson <[email protected]> wrote:  
 
 On 2020-03-15 14:25, Rajendra Panchal via LIRC-list wrote:
> Hello LIRC Group Members:
> 
> I am revisiting this group after a long time(2015 or so). So please 
> pardon me if this is not the right address for the request.
> 
> I am successfully using RPI3B+ to transmit IR code to a connected device 
> IR receiver, both inside an enclosure; so directly wire-able to bypass 
> the IR TX/RX HW with a simple wires from GPIO.

You want to send "IR signals" without modulation. In principle simple; 
you just put

frequency 0

in your lircd.conf. However, not all components can handle non-modulated 
signals though. (lircd only since 2015: 
https://sourceforge.net/p/lirc/tickets/132) Make sure that you are using 
a driver that can handle unmodulated signals; I do not know the status 
of the current RPi stuff. ("My" driver 
https://github.com/bengtmartensson/lirc_rpi definitely does, but is not 
compatible with current kernels.)

Greetz,

Bengt