Send IR signals to Spark core from Arduino

[KevinSjoberg]

Hi,

We’re on a Hackathon and are looking for a way to communicate between the Spark Core and the Arduino UNO. We want to send some textual data from the Arduino to the Spark Core for further processing.

Can the TX/RX pins be used to communicate between them?

All help is appreciated!

Cheers,
Kevin

[Moors7]

Take a look at this topic: Spark (3.3v) to Arduino (5v) Serial Communication

[ScruffR]

It’s a while, so my Core memories might be a bit rusty, but Serial2 (D0/D1) should be 5V tolerant, so you could go this way without any level shifting

But have a look at the docs to make sure

[AnalysIR]

Backdoor uPWM Hack on Photon for Infrared signals using UART

We have finally found an easy way to get Hardware PWM for Infrared signals using the Photon, using the UART hack below. It may also be of use to others looking for faster PWM and variable duty cycles at 10% intervals. The full source code and IR driver circuit are availabe via the link above or via http://www.AnalysIR.com/ PS: This should also work on Spark & other fast MCUs, if needed. (untested) .[image]