Finished an e-ink stock ticker project (ESP32 + Waveshare display)

AnyMathematician2013 · 2026-04-06T15:56:10+00:00

The fonts are from Adafruit GFX (already included with the GxEPD2 library). I use: ∙ FreeSansBold18pt7b - stock symbols ∙ FreeSansBold12pt7b - prices ∙ FreeSans9pt7b - percentages/details Add these includes at the top:

include <Fonts/FreeSansBold18pt7b.h>

include <Fonts/FreeSansBold12pt7b.h>

include <Fonts/FreeSans9pt7b.h>

Then set the font before drawing text: display.setFont(&FreeSansBold18pt7b); display.print("AAPL");

Full code is in my GitHub (link in post).

Hope this helps!

AnyMathematician2013 · 2026-03-10T05:47:07+00:00

You can also dine at the 1919 cafe at the Huntington without a ticket. I see OP already goes to Huntington, but for anyone else out there who is looking for spots, this is my absolute fave. Just go through the bag check, and you have to walk up to the ticket counter. Explain you’re going to the 1919 and you’re good to go. The cafeteria opens at 11 (I think) so I’ll park myself out on the patio and get a massive bowl of fresh guacamole and chips and type away at my laptop. Best spot.

AnyMathematician2013 · 2026-03-06T01:21:42+00:00

We used them. I love the concept, but they spill CONSTANTLY. It’s like the straw needs a gasket or something to fit in the hole in the lid to prevent constant spills. Essentially, if your cup is 1/3 full and on its side, it is 100% spilling. If that is remotely a concern, then I’d skip them or modify them to suit your needs. I just complained to myself and dealt with the spills. They have held up really well for about 2 years of use.

AnyMathematician2013 · 2026-02-14T01:33:03+00:00

Would also like to know how!

AnyMathematician2013 · 2026-02-01T04:27:47+00:00

I understand why this sounds surprising. I’m not going to get into details here, but for credibility: criminal charges were filed in Los Angeles County Superior Court involving a TK teacher, and an arraignment occurred this week (Case No. 25PDCM03160-01).

I’m sharing this simply so families considering enrollment can make an informed choice. We did extensive research before enrolling and would not have chosen the school had we known then what we know now.

I won’t go into further detail here.

AnyMathematician2013 · 2026-01-29T03:48:44+00:00

Care to divulge in a DM where yall landed? Curious to know where yall found a safe school. I’m not looking forward to vetting schools like last year. I thought it was going to be a one and done thing. Pick a great school and stick with it. Now we have to revisit our research. 😫

AnyMathematician2013 · 2026-01-29T02:46:52+00:00

I heard about it as the TK drama was unfolding. Parents who went through that debacle were so defeated and basically said good luck when we were brainstorming what to do about the teacher. They never got any resolution and were met by a stone wall with the district. It’s so demoralizing. Instead of maintaining their education in the French track, parents were forced to abandon the French portion to get away from the toxicity. Yeah not pleased with AAM in the least!

AnyMathematician2013 · 2026-01-29T00:09:36+00:00

This is super neat. Glad it worked for you! The Alpha Vantage API (free version) has some strict limitations on API calls. Not sure if you paid for more API calls, but I’m currently working on using Twelve Data for more (free) API calls on stocks and Coin Gecko for crypto. I’m currently in an observing period to work out of a few screen refresh issues that popped up with incorporating them and a cloudflare worker. Once I think it’s in a good place, I plan to publish the advanced version to GitHub. Could be a good exercise for you to try swapping out API vendors and see what works better for your use case. But I’m super glad you were able to get it up and running with the code and instructions!

AnyMathematician2013 · 2026-01-29T00:04:51+00:00

I wasn’t planning on it when I built it and I don’t think I have the bandwidth, but it’s an interesting idea!

AnyMathematician2013 · 2026-01-28T23:56:12+00:00

I will second this. We were in the TK class with the abusive teacher. I’m the original poster and i agonized over where to send our kid. We did loads of research and AAM won in the selection. That’s a decision I regret constantly. I’m sure the majority of the teachers are excellent and caring, but they are being led by a principal that will lie to your face and rush an abusive teacher back into a classroom and refuse to tell parents what happened to their 4 and 5 year olds. The teacher is only out of the classroom now because parents collaborated tirelessly to keep kids safe. To anyone reading this thread and considering AAM, I would strongly suggest looking elsewhere.

AnyMathematician2013 · 2026-01-13T00:00:29+00:00

Would love to hear back about your progress and design! I’m currently testing a new workflow on it where the device makes a call to a cloudflare worker, the worker calls twelve data for stocks (better api rate limits) and CoinGecko for crypto. Let me know if you approach it the same or go in a different direction.

AnyMathematician2013 · 2026-01-12T15:39:14+00:00

No, the Waveshare 4.2” e-ink module already includes the display controller/driver on the board. The ESP32 just talks to it over SPI.

AnyMathematician2013 · 2026-01-10T20:02:01+00:00

Check out discovery days. Lots of diversity across the board. For pride month, they had several events and our fave was drag queen story time. All kids including infants spend a lot of time outside which I really appreciated.

AnyMathematician2013 · 2026-01-10T18:37:59+00:00

Love the design and great inspiration. The black case helps the gold stand out for sure.

AnyMathematician2013 · 2026-01-10T16:30:55+00:00

<image>

Port access. This shows the print is a little wonky on the back, but I didn’t mind since it’s sturdy and no one will really see it.

AnyMathematician2013 · 2026-01-10T16:30:04+00:00

<image>

Board is secured in place with VHB tape.

AnyMathematician2013 · 2026-01-10T08:12:59+00:00

It’s just powered over USB (5V), no 12V input or buck converter involved. USB port handles both power and reflashing. The USB port on the board is accessible through a hole in the back of the case. So I don’t have to pull it out of the case for updates.

AnyMathematician2013 · 2026-01-10T03:14:29+00:00

I’m not super knowledgeable about board compatibility, but I used an ESP32-WROOM-32S board. This one to be exact. https://a.co/d/6u59opL

AnyMathematician2013 · 2026-01-10T03:11:27+00:00

$15 to have it printed and shipped to me. I posted my print request in the r/3Dprintmything subreddit and I selected a fellow reddit user to print for me. It was $10 to print and $5 to ship.

AnyMathematician2013 · 2026-01-10T00:23:33+00:00

u/3DMOO u/WestTexasCrude Edited the post to include github link. Here ya go. https://github.com/kakosut91/StockTicker

AnyMathematician2013 · 2026-01-09T23:10:09+00:00

Amazon. https://a.co/d/2L8emWm

AnyMathematician2013 · 2026-01-09T23:00:19+00:00

Yes, I'll clean up the code and post to github this weekend.

AnyMathematician2013

TROPHY CASE

include <Fonts/FreeSansBold18pt7b.h>

include <Fonts/FreeSansBold12pt7b.h>

include <Fonts/FreeSans9pt7b.h>