A new companion on my desk

I have this Pi Zero W for a while doing nothing but now it has a use case. :) I started monitoring my small GPU rig with it.

Scenario 1: Rig is up, everything is OK.

Scenario 2: Rig is down, alarm!

It was pretty cool to play with inky phat. I'll definitely try to hack more sophisticated things on it.

I use hiveon as pool, so it gathers stats from there. Based on the reported hash rate, one of the two different drawings shows up on the e-ink screen. If you want to try this, make sure you have libraries installed. (arrow, requests, etc.)

Here is the full script:

import requests
import inkyphat
import arrow
import os

wallet = os.environ['WALLET']
font_file = inkyphat.fonts.PressStart2P
font = inkyphat.ImageFont.truetype(font_file, 11)
inkyphat.set_colour('red')


def main():
    r = requests.get(f"https://hiveon.net/api/v0/miner/{wallet}?currency=ETH")
    r.raise_for_status()
    data = r.json().get("data")
    hash_rate = int(data.get("hashrate"))
    utc = arrow.utcnow()
    local = utc.shift(hours=2)
    last_update = local.format('HH:mm')

    if hash_rate > 0:
        mh = round(hash_rate / 1e6, 2)
        msg = f"MINING { mh} MH"

        inkyphat.set_border(inkyphat.WHITE)
        text_colour = inkyphat.BLACK
    else:
        msg = "Rig is DOWN!"
        inkyphat.set_border(inkyphat.RED)
        text_colour = inkyphat.RED

    print(msg)
    msg2 = last_update
    w, h = font.getsize(msg)
    msg_x = int((inkyphat.WIDTH - w) / 2)
    msg_y = int((inkyphat.HEIGHT - h) / 2)

    inkyphat.text((msg_x, msg_y - 11), msg, text_colour, font=font)
    inkyphat.text((inkyphat.WIDTH - 66, inkyphat.HEIGHT - 15), msg2, text_colour, font=font)

    inkyphat.show()

main()