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, Kev…

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 :wink: But have a look at the docs to make sure :sunglasses:

[image] Backdoor uPWM Hack on Photon for Infrared signals using UART Project Share 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…

Send IR signals to Spark core from Arduino

Troubleshooting

Moors7 December 12, 2015, 4:58pm 2

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

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Send IR signals to Spark core from Arduino

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