Category Archives: IR Sources

ESP8266 NodeMCU Backdoor uPWM Hack for IR signals

We received our ESP8266 NodeMCU several months ago it has been difficult to find a working example of Hardware PWM to generate crisp Infrared carrier signals. Most posts we have read suggest that there is no PWM readily available on any of the supported platforms. As we have already shown with Arduinos and the Particle Photon we figured it would be possible to use a spare UART pin on the ESP8266 NodeMCU to achieve our goal.  After some initial success we encountered some watchdog timeouts/resets and it seemed like the uPWM hack would not be possible on the ESP8266 Node MCU platform. For a few weeks we ‘parked’  the effort and today we decided to try again with all of the latest and updated firmware available from the ESP8266 community via the Arduino IDE. This time we were successful and the ESP8266 NodeMCU Backdoor uPWM Hack for IR signals using works!

ESP8266 NodeMCU uPWM Inverted IR Circuit
ESP8266 NodeMCU uPWM Inverted IR Circuit

Continue reading ESP8266 NodeMCU Backdoor uPWM Hack for IR signals

ESP8266 NodeMCU Infrared decoding added to AnalysIR

A few months ago a new user to AnalysIR, from Canada, asked us to assist in adding ESP8266 NodeMCU Infrared decoding over WiFi into  AnalysIR. We set about making some upgrades to AnalysIR for this and in double quick time he had AnalysIR accepting IR signals from the ESP8266 over WiFi. He stressed the ease of use of the support within the Arduino IDE for ESP8266 devices and he wasn’t kidding. This motivated us to go and order an ESP8266 for US$3.60 including shipping from Aliexpress. Just the other day the NodeMCU arrived, presumably  delayed somewhat by the extended XMAS holidays & celebrations, in this part of the world. So we set about porting our existing firmware for Arduino & Photon over to the new device.

ESP8266 NodeMCU Infrared decoding with AnalysIR
AnalysIR supports ESP8266 NodeMCU over WiFi & Serial/USB

ESP8266 NodeMCU now joins a growing list of devices supported for use with AnalysIR, including: Continue reading ESP8266 NodeMCU Infrared decoding added to AnalysIR

Preview: A.IR Shield Photon, a high-end Infrared Shield for AnalysIR

The final member of our first MakeIR series of devices & kits is the A.IR Shield Photon. This shield works out of the box with AnalysIR and is essentially plug & play, with additional prototyping options. The shield plugs into a (Particle) Photon with headers or pin-compatible clone. Although designed specifically for AnalysIR, users can also upload any sketches that run on the Photon for Infrared remote control projects by customising the included firmware. A.IR Shield Photon is built with only the highest quality IR components available and boasts dual Infrared emitters with configurable IR Power. The supplied firmware supports hardware PWM for sending IR signals.

A.IR Shield Photon block diagram RevA
A.IR Shield Photon 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 Photon shield.

MakeIR - AIR Shield Photon
MakeIR – AIR Shield Photon

Continue reading Preview: A.IR Shield Photon, a high-end Infrared Shield for AnalysIR

Backdoor uPWM Hack on Photon for Infrared signals using UART

Since we received our Photon several months ago it has been difficult to find a working example of Hardware PWM on the Photon. Initially, we ported our softPWM approach to the Photon, which is excellent. However, we figured it must be possible to use at least one of the spare UARTs on the Photon to achieve our goal. So first we started prototyping on the Arduino and quickly got a working example with some limitations – only 40 kHz and 33 kHz carrier frequencies were possible with the UART without delving into the registers a bit more. Then we moved the code over to the Photon, leveraging our previous softPWM examples, upgraded with the Arduino code – EUREKA! The Backdoor uPWM Hack on Photon for Infrared signals.

uPWM Circuit diagram for Photon
uPWM Circuit diagram for Photon using UART

Continue reading Backdoor uPWM Hack on Photon for Infrared signals using UART

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 #2 is now available for download

Dublin, Ireland – 17th April 2015. We are happy to announce the latest release of AnalysIR V1 preview #2 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 LearnIR (IR Learner). LearnIR delivers the best performance available for receiving and sending Infrared signals with excellent accuracy.

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 last months.

Some Highlights in this latest release include:

Continue reading Latest release of AnalysIR V1 preview #2 is now available for download

Infrared receiver showdown – TSOP34438 vs VS1838B winner revealed

Having helped many makers resolve problems with Infrared remote control projects over on the Arduino forum, we decided to put 2 of the more common 38kHz receivers, TSOP34438 vs VS1838B,  ‘head-to-head’ over 3 rounds in a winner takes all contest. Different people report a wide variety of problems when first attempting infrared remote control, resulting from using the wrong receiver to timer or interrupt conflicts between the various libraries available. Our commentary on the ‘face-off’ will hopefully shed some light on the ability of these 2 common Infrared receivers to deliver results, as expected.

Idle Interference on VS1838B
Idle Interference on VS1838B

Continue reading Infrared receiver showdown – TSOP34438 vs VS1838B winner revealed

AnalysIR supports PSOC 4 from Cypress

AnalysIR now provides support for the PSOC 4 Prototyping kit from Cypress. Effective immediately users of AnalysIR can use the kit to act as an Infrared source for AnalysIR. The PSOC 4 Prototyping kits are available from Cypress and via their global distributors for just US$4 plus shipping. To use the kit with AnalysIR you will also need an IR Receiver and an optional IR Learner, which can also be purchased with AnalysIR. Initially, the PSOC Firmware is available on request and will be included as part of the installation package in a future release.

PSOC4 and AnalysIR
PSOC4 and AnalysIR

Continue reading AnalysIR supports PSOC 4 from Cypress

Teensy now supported for AnalysIR

A new user of AnalysIR from the Netherlands, wanted to get the AnalysIR firmware working on Teensy 3.x . Although this has not been officially supported, we were happy to support his efforts knowing that it would most likely be a relatively easy exercise, based on past experiences. Needless to say, he was successful in decoding Infrared signals with AnalysIR within a short space of time. Prompted by his interest, we ordered our own Teensy 3.1 to add to our growing collection of 40+ MCUs and although Teensy support is in beta for now, it will be oficially supported for AnalysIR from our next release. In the meantime, users of AnalysIR can just contact us for a copy of the Teensy sketch (firmware).

Teensy 3.1 now supported for AnalysIR
Teensy 3.1 now supported for AnalysIR

Teensy 3.x now joins a long list of devices supported for use with AnalysIR, including: Continue reading Teensy now supported for AnalysIR

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