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I am trying to set up and send IR-Signals with my Pi using LIRC I was already able to receive signals and to configure them as a remote device. I followed this tutorial : https://gist.github.com/prasanthj/c15a5298eb682bde34961c322c95378b and added the following lines to my /boot/config.txt

dtoverlay=gpio-ir,gpio_pin=22
dtoverlay=gpio-ir-tx,gpio_pin=23

but when I try

irsend SEND_ONCE nameOfRemoteConf KEY_POWER

I get this error

transmission failed
Error running command: Input/output error

I tried some troubleshooting but nothing worked for me could it be that there is something wrong with the IR transmitter or its pinning?

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