Tag Archives: AirCon

Sending long AC Signals from Flash with IRremote

One of the most popular projects involving Infrared remote control, is to use an Arduino to control an Air conditioner (AC) system. However, AC signals are usually very long and take up a lot of SRAM on a standard Arduino. Experienced users will go about reverse engineering the AC protocol to make the sketch fit within the 2K Bytes of SRAM. Many hobbyists will struggle, even with the help of tools like AnalysIR to guide them. In this post we cover sending long AC Signals from Flash with IRremote. IRremote (along with IRLib) is a popular open-source library for sending and receiving IR remote control signals with Arduino. The demo code covered in this sketch extends our previous sendRAW example by demonstrating how to store many long AC signals in Flash with little or no SRAM overhead.

AnalysIR screen-shot showing the signals captured from the sendRAW_Flash sketch
AnalysIR screen-shot showing the signals captured from the sendRAW_Flash sketch (click or more detail)

Continue reading Sending long AC Signals from Flash with IRremote

Preview: A.IR Shield Nano, a high-end Infrared Shield for AnalysIR, IRremote & IRLib

The fifth member of our MakeIR series of devices & kits is the A.IR Shield Nano. This shield works out of the box with AnalysIR and is essentially plug & play , with additional prototyping options. The shield comes attached to an Arduino nano compatible device (clone). Although designed specifically for AnalysIR, users can also upload IRremote, IRLib or any Arduino sketches that run on the Nano. A.IR shield is built with only the highest quality IR components available and boasts dual Infrared emitters with configurable IR Power.

A.IR block diagram
A.IR Shield Nano block diagram

We have provided a link below to the preliminary product data sheet and would welcome feedback on additional, nice to have or missing features, if any. Please read the data sheet for a more detailed description of the A.IR shield. Continue reading Preview: A.IR Shield Nano, a high-end Infrared Shield for AnalysIR, IRremote & IRLib

Latest release of AnalysIR V1 preview #3 is now available for download

Dublin, Ireland – 27th August 2015. We are happy to announce the latest release of AnalysIR V1 preview #3 is now available for download by our backers & supporters. Existing users of AnalysIR will receive an email with instructions on how to download this version. New users will receive the details as part of the registration process.

AnalysIR Screenshot
AnalysIR Screenshot

A major highlight of this release is full AnalysIR support for our soon to be released A.IR shield. A.IR was designed to function as a high-end input/otput IR device for AnalysIR and will also work with IRremote, IRLib and any other Arduino sketch. More details will be published soon.

View the AnalysIR Product Sheet(PDF)

We would like to extend a big thanks to the many users around the world who have helped with feature requests, new protocols and testing over the past 2 years.

Some Highlights in this latest release include:

Continue reading Latest release of AnalysIR V1 preview #3 is now available for download

Reverse engineering the Panasonic AC Infrared protocol

Recently, two of our users in France (Vincent & Mathieu) collaborated to reverse engineer the Panasonic AC Infrared protocol, one of the more challenging AC Infrared protocols using AnalysIR. Not only did they identify the codes & checksum but also provided some impressive documentation and full source code to help others. Detailed information is available via GitHub which is linked below. This 216 data bit Panasonic AC Infrared protocol is composed of two consecutive frames. The first frame remains constant for every command sent to the AC unit. In common with most AC units the complete configuration is sent with every IR signal (temperature, fan, swing etc…). AnalysIR was used to record and turn the signal into HEX/Binary format from which the reverse engineering of the individual fields was tackled.

AnalysIR - Panasonic AC 216 bit Infrared signal
AnalysIR – Panasonic AC 216 bit Infrared signal

Continue reading Reverse engineering the Panasonic AC Infrared protocol

Preview: DetectIR, advanced infrared receiver

The fourth member of our MakeIR series of devices & kits will be DetectIR. This infrared receiver module can be configured for Visual IR signal detection, Serial over IR or as an Infrared receiver which can handle even the longest Air conditioner signals. DetectIR is built with only the highest quality IR components available.

DetectIR block diagram
DetectIR block diagram

We have provided a link below to the preliminary product data sheet and would welcome feedback on additional, nice to have or missing features, if any. Please read the datasheet for a more detailed description of DetectIR. Continue reading Preview: DetectIR, advanced infrared receiver

Video: AnalysIR Demo Batch Infrared Decoding

Here we show a screen capture demonstration of the ‘Batch Decoding’ feature of AnalysIR. We show Infrared signals from 4 different Air Conditioners and how we can load them into AnalysIR and execute a batch decode of all of the signals in one easy step. Included are signals from Panasonic, Vestel, Fujitsu & Daikin

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AnalysIR now decodes 40 Infrared Protocols

We have been updating the AnalysIR documentation for the upcoming 1.0 release and realised that AnalysIR now decodes 40 Infrared protocols. Wow!. Along with the most common TV & media remotes controls there are 15 Air Conditioner protocols included. The full set of protocols is included with the latest ‘dev’ release, which is available to all current & new owners of AnalysIR (less the aforementioned documentation) in advance of the  pending 1.0 release. The 1.0 release will incorporate over 170 new features, updates and fixes compared to the initial release and also supports our new IR Learner which will be launched along with a range of Infrared kits in the coming months.

Over 40 Infrared ProtocRols supported by AnalysIR
Over 40 Infrared Protocols supported by AnalysIR

Here is the latest list of Infrared protocols supported by AnalysIR. Continue reading AnalysIR now decodes 40 Infrared Protocols

Controlling Chigo Air Conditioner via Infrared from smart phone

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.

Samsung IR Remote appSamsung IR Remote app

Continue reading Controlling Chigo Air Conditioner via Infrared from smart phone

Poor maker’s Infrared receiver #2

Our recent post about the silver bullet IR receiver proved very popular and we promised that we would follow-up with another variant of the poor maker’s Infrared receiver. This time we are using an IR Led (emitter), 2 resistors and any standard Arduino. You will also need to download the Arduino code provided below, compile and upload it. One of the most common problems encountered when trying to decode IR signals is that makers don’t always have the appropriate IR receiver for the job in hand or have to wait for one to be delivered by mail. Here we present an affordable method to allow you to use any IR emitter (LED) as a receiver and as a bonus we are publishing the Arduino code to make it all work.

Circuit Diagram: Poor maker's IR Receiver
Circuit Diagram: Poor maker’s IR Receiver

Continue reading Poor maker’s Infrared receiver #2

‘Silver bullet’ – the Oscilloscope Infrared Receiver

A while ago we came across a website on infrared remote controls which suggested a simple way to view IR signals using an Oscilloscope. The idea is to use a standard IR Led mounted into a BNC/RCA plug using a spare channel  making an Oscilloscope infrared receiver. So we set about ordering the connectors, which arrived in the post today. Another way of looking at this device is as a ‘poor-mans’ IR receiver, but if you have an Oscilloscope to plug it into then maybe you are not so poor after all.

 

Silver Bullet - Infrared Receiver connected to Channel 1
Silver Bullet – Infrared Receiver connected to Channel 1

Continue reading ‘Silver bullet’ – the Oscilloscope Infrared Receiver