What is the best way to control a (old) Daikin AC unit with infra red ?
So far the option i found are
BroadLink RM Mini3 Black Bean (I saw some scripts on github to send command to it, but nothing for AC control)
Tasmota Firmware: I have a Sonoff RFBridge flashed with Tasmota Firmware, and there are some IRSend commands available for it. I guess I can add an IR module to an available GPIO ? Also, Daikin is not listed in the AC protocol supported (src code)
Logitech Harmony but seems to expensive …
I guess controling and IR AC unit is more complicated than sending a simple IRCode ?
(Note: the PI running openhab is not in the same room as the AC, cannot connect and IR emitter on it )
So we add up: 2 diodes and a transistor = 1.7v + 1.7v + 0.7v = 4.1V
That leaves 0.9v across the resistor
We want to limit the current to 100mA (The diodes will sustain 50mA continuous but we are just pulsing signal so it will be ok)
Ohm’s law give R = V/I so R = 0.9v/100mA = 9 ohms which we round up to 10 ohms (easier to find)
PN2222 is kind of the basic reference NPN transistor. You’ll be fine with that one.
What you are looking for is the max collector current. In this case 600mA. Our target is 100mA. Well within the tolerance of the transistor.
Hello i am trying to achieve the same result to manage a daikin IR! I had no problem to build the HW part with a NodeMCU and IR leds, with IRRemote library i can do something but i can’t understand how you tweak it to make it work with MQTT both readin/writing and which was your strategy on OH side.
Would you please share the tweaked .ino code to understand?
Thank you very much!