Add device - Athom AR01 IR Controller (#990)

* Create index.md for Athom AR01 IR Controller * Added pictures * Update index.md Removed extra whitespace.
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+---
+title: Athom AR01 IR Controller
+date-published: 2025-01-18
+type: misc
+standard: global
+board: esp8266
+made-for-esphome: False
+difficulty: 2
+---
+This is an IR receiver and transmitter that is shipped with Tasmota installed by the manufacturer.
+
+**Manufacturer product page:** [Athom AR-01 Tasmota IR Controller](https://www.athom.tech/blank-1/tasmota-ir-controller)
+
+![Athom AR01 IR Controller - Front](ar01-01-enclosure_front.jpg "Athom AR01 IR Controller - Front")
+
+![Athom AR01 IR Controller - Inside](ar01-06-top_pcb_removed_from_enclosure.jpg "Athom AR01 IR Controller - Inside")
+
+## Flashing
+
+This device can be flashed by making a serial connection using the USB-C port.
+
+I did not test this, but there is what looks to be pads for a serial connection. I would also guess that this could be flashed from the default Tasmota web interface.
+
+## GPIO Pinout
+
+| Pin    | Component |
+| --- | --- |
+| GPIO0 | Button |
+| GPIO4 | IR transmitter |
+| GPIO5 | IR receiver |
+| GPIO12 | LED3 (top) |
+| GPIO13 | LED2 (middle) |
+
+## Configuration
+
+```yaml
+esp8266:
+  board: esp8285
+  restore_from_flash: true
+
+remote_receiver:
+  pin:
+    number: GPIO5
+    inverted: true
+  dump: all # Dumps received codes to logs.
+
+remote_transmitter:
+  pin:
+    number: GPIO4
+  carrier_duty_percent: 50%
+
+output:
+  - platform: gpio
+    pin: GPIO12
+    id: gpio_12
+  - platform: gpio
+    pin: GPIO13
+    id: gpio_13
+
+switch:
+  - name: "Top LED"
+    id: led_top
+    platform: output
+    output: gpio_12
+  - name: "Middle LED"
+    id: led_middle
+    platform: output
+    output: gpio_13
+
+binary_sensor:
+  - platform: gpio
+    pin:
+      number: GPIO0
+      mode:
+        input: true
+      inverted: true
+    name: Bottom Button
+    on_press:
+      then:
+        - switch.toggle:
+            id: led_middle
+        - delay: 2s
+        - switch.toggle:
+            id: led_top
+```
+
+## Using the Device
+
+[ESPHome documentation on receiving and sending codes](https://esphome.io/guides/setting_up_rmt_devices#remote-setting-up-infrared).
+
+The IR codes received may be parsed by several of the codecs. Just pick one of them to use. While testing, it may be helpful to change `dump: all` to just the protocol your IR remote uses, to make reading the codes easier.
+
+In my ESPHome configuration, I ended up with a fair amount of template buttons where each one sends out an IR code using the appropriate `remote_transmitter.transmit_xxxx` action.