3Runnerz

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Inspiration

We all know that being active and fit is essential to our mental and physical well-being.
During this COVID-19 pandemic, it is difficult to get motivated and get in shape outside.

What if we could address this issue by creating a system that rewards people for taking care of themselves?

3Runnerz is a running system based on Hedera Hashgraph.
It allows runners to register for competitions and rewards them with RUNz tokens and NFTs depending on their performances.

3Runnerz ecosystem contains 2 parts:

The 3Runnerz portal where runners can sign in and register their performances.
An electronic device (pedometer) that records the runners' performances.

The 3Runnerz token (RUNz) is used to reward runners.
Runners are rewarded on a one-to-one ratio with their running distance.
For instance, for a total distance of 2,000m, a runner will get 2,000 RUNz.

The top 3 runners of every competition will also get NFT rewards:

gRUNz represent a "Gold Medal" NFT
sRUNz represent a "Silver Medal" NFT
bRUNz represent a "Bronze Medal" NFT

Please have a look at here for more details about the NFTs.

How I built it

I built it using both software and hardware components.

Software:

Hedera Token Service (HTS) - used to issue fungible and non-fungible tokens.
DragonGlass API - used to access the Hedera mirror network and request historical information.
Coingecko API - used to get the HBAR (ℏ) price.
WebUSB - used to talk to the hardware device through the web.
Arduino IDE - used to flash the device firmware.

Hardware:

MacBook Pro - used as the host.
Arduino Nano 33 IoT - used as the hardware device.

Arduino's firmware can be found here in the GitHub repository.

Total hours spent on the project: 200h.

Challenges I ran into

Designing an accurate device for tracking the runner's performance.
Bidirectional communication between the app and the device.
Finishing the project on time.

Accomplishments that I'm proud of

I'm proud that I've delivered what I had in my mind.

What I learned

I learned how to issue fungible and non-fungible tokens on Hedera Hashgraph. I was really surprised to see how straightforward that was to do so with Hedera compared to blockchain technology.

I also learned how to use DragonGlass API to query information from mirror node but also the Coingecko API to get the current HBAR price.

Regarding the hardware part, I learned how to build a pedometer using a microcontroller and an accelerometer.