Nu-Link-Me Master Chip Fw Android Connected Webapp
Nu-Link-Me Master Chip Fw Trial Velcro Lets

Im hoping that since they are used very infrequently and the IR signals are super short pulses (lower duty cycle than most dim PWM signals) I wont need to replace the LEDs for some time.

WiFi IR Blaster Project tutorial by BuddyC 118,525 views 46 comments 116 respects Project tutorial WiFi IR Blaster GPL3 A connected universal remote.

It seems like the major phone manufacturers are moving away from built in IR blasters so Im looking for a way to future-proof my dumb devices that dont currently integrate with my IoT infrastructure.

I have a mesh-networked smart home, but I need to find a physical remote to turn on my TV There has to be a better way.

Nu-Link-Me Master Chip Fw Android Connected Webapp

I recently built an IR blaster that controls stand alone air conditioners in my house and another previous project was a connected HVAC vent with an android connected webapp.

Essentially, all I need to do is combine these two things into a web-connected IR blaster with a webapp frontend so I can press buttons on my phone and have IR signals sent to my media centers.

These can be deployed in every room and controlled anywhere from a single interface, so the applications for this are extreamly broad.

Arduino Nano, logic level converter, and ESP8266 This worked just fine in that I could request a specific URL on the IP assigned to the ESP8266 and have the Arduino output a Power signal to the IR LED.

I just needed to find out where to host the webapp, have that send the URLs to the IR blaster and then have those requests parsed into specific IR codes.

This was very tedious to do using AT commands with the ESP8266, and there was something causing a 1-2 second delay between sending the request and the LED blinking.

I used another Arduino Nano to read the IR signals from all my remotes and stored their raw values NodeMCU I went ahead with the NodeMCU ESP8266 dev board because it has onboard power regulation, USB to serial interface, and plenty of IO pins in this small package (its also breadboard friendly).

It turns out there is already an ESP8266 WebServer library that accepts GET requests that I was able to adapt for sending IR codes and the regular IRremote library works out of the box.

NodeMCU testing with regular LEDs The ESP8266 on the NodeMCU isnt powerful enough to host the webapp itself, so Ill run it on an underutilized C.H.I.P.

Another limitation is that the ESP8266 is that its a 3.3v board, so the IR LEDs driven directly from an IO pin were very dim and had to be right next to the appliance it was sending a signal to.

I instead used the IO pin to drive an npn transistor to switch the 5v supply voltage onoff.

REST.ish After doing some research, I found a great tutorial for implementing a REST API for Arduino to control LEDs on adafruit.

I used their JavaScript and PHP files to submit the cURL requests and loaded that on the CHIP which is already running apache but could just as easily be hosted in the cloud.

After creating a basic HTML page for the remote control, I added the manifest.json and icon files so it can run as a native webapp on an Android phone.

Based off the URL, the Arduino would send the IR code that was mapped to the button pressed.

Universal Remonster This is just begging for googly eyes Velcro so I can mount it underneath a shelf in my AV cabinet The guts alongside the prototype Everything is working flawlessly with zero delay.

I discovered that the IR LEDs Im using have a very narrow angle, so I have to be careful that they are pointed correctly.

Nu-Link-Me Master Chip Fw Trial Velcro Lets

Some industrial velcro lets me mount it under a shelf, out of sight, and makes sure it stays pointed at the IR receivers on the other end.

I added some thick gauge wire to the LED leads so they can be fine tuned.

See it in action Having resistors for the IR LEDs caused them to be almost unusable, so the transistor is powering them with an unregulated 5v.