Anyone who has tried  controlling an Air Conditioner unit using an Arduino, USB IR Toy, RPi or any MCU will know how difficult it can be to record the longer infrared signals they use. Typical TV systems use IR signals circa 32 bits long, while this Chigo AC unit uses a signal with 197 marks & spaces (or 97 data bits). One of our users, Sertunc – from Istanbul in Turkey, reported his success using AnalysIR to easily record the signal timings for his AC unit and sent us the details along with some nice photos. After testing the validity of the recorded signals using an Arduino, he then set about loading the signals onto his Samsung smart phone (models S4, s4 mini, S5 and more supported). This was helped by installing the free ‘Samsung IR – Universal Remote‘ app onto his phone via Google Play. The image on the left above shows the main user interface on the smart phone. The image on the right shows the configuration screen, with the IR signal exported from AnalysIR in Global Caché format.

The first step was to record the signals into AnalysIR using an Arduino equipped with an IR receiver. AnalysIR comes supplied with the firmware sketch for most Arduinos which are then connected to AnalysIR via USB on the Windows PC. AnalysIR also has a feature to automatically generate the ‘C’ required for the IRLib or IRremote libraries. Sertunc first decided to test his newly acquired AC signals using the IRLib library on his Arduino using the automatically generated ‘C’ code (see code below). Similarly, any recorded or imported signal can be exported in several common formats, including:To get the signals on to his smart phone, he opted to use the Global Caché format, which is easily exported by AnalysIR. Another option with this app would be to use PRONTO format which is also supported by AnalysIR. For his next project, Sertunc plans to delve deeper into the bit patterns of the AC IR signal to reverse engineer the bit patterns of the individual fields & checksum. Stay tuned….The ‘Samsung IR – Universal Remote‘ app is supported on extensive range of smart devices, including:  Galaxy S4 , S4 mini , Active , Zoom, S5 , S5 mini , MEGA, Note 3, Note 8.0 , 10.1, Galaxy Tab 7.0 , 7.7 plus, Tab 2 7.0 I705, 10.1, Tab 3 8.0 , 10.1 P5220 , P5200 Tab Pro 8.4 , 10.1 , 12.2 and others with IR transmitter.

It looks like the Author will add more devices on request, provided it has an IR transmitter.water cooled air conditioner unitsSo what does the signal look like? ac heating package unitsBelow is a screenshot showing 2 of the captured images.air conditioning outside unit not coming onChigo Air Conditioner Infrared Signals AnalysIR Screenshot (click for larger image)Finally, here are some links to the Chigo AC Infrared signals in various formats:IRLib format – automatically generated ‘C’ code AnalysIR Session History file – for import into AnalysIR (AnlaysIR users only)You can get your own copy of AnalysIR – here.For referency the Chigo Aircon unit is a  wall type 9000 btu unit id CS-25H3A-V118AY1The IR codes are reported to be the same for following Chigo models: CS-35H3A-M118AH4, CS-51H3A-P118AH4A, CS-61H3A-P118AE2, CS-70H3A-W118ASA Although this article relates to the signals of the Chigo AC unit, Sertunc points out that the same process can be applied to any brand of Airconditioner (Samsung, Daikin, Mitsubishi

, Protec, Ilia, Panasonic, Sharp, Sanyo, Toshiba, Carrier, LG etc) which can be controlled by Infrared.You might also like.... Smart 14,000 BTU Portable Air Conditioner and Dehumidifier Function w/ Wi-Fi and Remote Control in White (81.6 pt./Day) Estimated Cooling Area Up to 500 sq. ft. Smart Phone full feature control The LG Electronics Smart 14,000 BTU Portable Air Conditioner can be controlled from anywhere using a smart phone. The product features a dehumidifier that removes up to 3.4 pt. of moisture from the air per hour. This convenient air conditioner and heater also features a remote control for easy temperature adjustment from across the room. This white air conditioner also features casters that allow for easy movement to the room that needs heating or cooling. Unit must stay upright for 24 hours before use. Unit must be vented to the outside (use included window installation kit and follow detailed installation instructions in the owner manual). Do not use extension cord(s).

Using the LG Smart AC application this portable air conditioner can be controlled from anywhere Designed to cool 500 sq. ft. (20 ft. x 25 ft.) for temperature control in a large room 14,000 BTU cooling for powerful temperature control Portable unit comes with one (1) hose installation kit. Get comfortable with the greatest of ease with casters to allow easy movement to the room that needs cooling so you can comfortably enjoy your room 3-speed fan adjusts to your heating or cooling needs 2-way air direction spreads the air evenly Digital controls allow precise temperature adjustment 24 hour On/Off Timer lets you create a cooling schedule without wasting electricity; an energy efficient programmable timer that can turn on your air conditioner before you arrive home or turn off after you leave Remote control for easy temperature adjustment from across the room Washable and Reusable air filter saves money on replacements Automatically restarts after a power failure;

there are storms, high winds and extreme heat that can lead to power outages; keep yourself covered with AutoRestart, which automatically turns the unit back on when power is restored Removes up to 3.4 pt. of moisture from the air per hour Product (W x H x D) 18.50 in. x 33.257 in. x 13 in. Unit must stay upright for 24 hours before use and must be vented to the outside (use included window installation kit) and do not use extension cords Unit must be vented to the outside (use included window installation kit and follow detailed installation instructions in the Owner's Manual) A/C Cooling Rate (BTU/hr): A/C Coverage Area (sq. ft.): This question is from Smart 14,000 BTU Portable Air Conditioner and Dehumidifier Function w/ Wi-Fi and Remote Control in White (81.6 pt./Day)3 How long is the exhaust hose? Is an extension available? This question is from Smart 14,000 BTU Portable Air Conditioner and Dehumidifier Function w/ Wi-Fi and Remote Control in White (81.6 pt./Day)3 does this unit contain auto evaporation system.