pi@raspberrypi:~$ irsend SEND_ONCE Samsung_BN59-00937A KEY_POWER

irsend: command failed: SEND_ONCE Samsung_BN59-00937A KEY_POWER
irsend: hardware does not support sending

#!/usr/bin/python
import RPi.GPIO as GPIO
import time
print "Starting blink test.."
GPIO.setwarnings(True)
GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.OUT)
while True:
    GPIO.output(17, True)
    time.sleep(1)
    GPIO.output(17, False)
    time.sleep(1)

lirc_dev
lirc_rpi gpio_in_pin=18 gpio_out_pin=17

dtoverlay=lirc-rpi,gpio_in_pin=18,gpio_out_pin=17

# /etc/lirc/hardware.conf
#
# Arguments which will be used when launching lircd
LIRCD_ARGS="--uinput"

#Don't start lircmd even if there seems to be a good config file
#START_LIRCMD=false

#Don't start irexec, even if a good config file seems to exist.
#START_IREXEC=false

#Try to load appropriate kernel modules
LOAD_MODULES=true



# Run "lircd --driver=help" for a list of supported drivers.
DRIVER="default"
# usually /dev/lirc0 is the correct setting for systems using udev
DEVICE="/dev/lirc0"
MODULES="lirc_rpi"

# Default configuration files for your hardware if any
LIRCD_CONF=""
LIRCMD_CONF=""

modprobe lirc_rpi gpio_in_pin=18 gpio_out_pins=17

/etc/modprobe.d/ir-remote.conf

options lirc_rpi gpio_in_pin=18 gpio_out_pin=17

pi@raspberrypi:~$ lsmod
Module                  Size  Used by
bnep                   10340  2
hci_uart               17943  1
btbcm                   5929  1 hci_uart
bluetooth             326105  22 bnep,btbcm,hci_uart
brcmfmac              186403  0
brcmutil                5661  1 brcmfmac
cfg80211              427855  1 brcmfmac
rfkill                 16037  4 cfg80211,bluetooth
snd_bcm2835            20447  1
snd_pcm                75762  1 snd_bcm2835
snd_timer              19288  1 snd_pcm
snd                    51908  5 snd_bcm2835,snd_timer,snd_pcm
bcm2835_gpiomem         3040  0
bcm2835_wdt             3225  0
lirc_rpi                6478  0
uio_pdrv_genirq         3164  0
uio                     8000  1 uio_pdrv_genirq
lirc_dev                8310  1 lirc_rpi
rc_core                16468  1 lirc_dev
i2c_dev                 5859  0
fuse                   84037  3
ipv6                  347594  46