0

Adafruit IO Update: New Line Chart and Gauge Rendering @adafruitio #IoT

Adafruit IO – our Internet of Things service –  just received a behind-the-scenes upgrade. In order to reduce the amount of Javascript we send to your browser every time you visit Adafruit IO and in order to fix an annoying memory leak bug, we’ve replaced the rendering engines for the gauge and line charts you see on your Adafruit IO dashboards and feed pages. They’re low-level updates to the Adafruit IO website you all use. For the most part the changes should be invisible, but we wanted to at least mention it in case they take you by surprise.

On the Adafruit IO Blog, Adam writes:

The question you may have, then, is why fix what isn’t (obviously) broken? I’m glad you asked! We made this update for two big reasons and one small one.

First, we’ve known for a loooong time that we have a big memory leak problem with line charts. If you’ve tried to keep a dashboard open with a line chart for more than a day, you might have noticed that you eventually came back to a frozen browser tab. If you’re unlucky, you might’ve found a crashed browser. 🙁 Even after long hours of debugging in multiple browsers, tracing live code, and rewriting parts of the chart rendering pipeline, it’s still not clear where the problem was. It could’ve been the library we were using–an SVG based renderer–or code we wrote on top of it, but we were pushing some part of the system beyond what it could handle. By replacing the old SVG based system with a canvas based charting library we eliminate the type of memory leak we were encountering. The bonus with choosing a charting library with more options for chart types is that we’ll soon be able to introduce those to you on the dashboards. Look for that in the next few months.

Second, our old gauges and line charts used a lot of code behind the scenes–the immensely powerful d3 library–to do just a little bit of work. We have intentionally kept our charts simple and clean, visually, but we included ~200 extra KB of uncompressed javascript code to do it. By replacing the gauge with a much smaller, hand built canvas-based plugin and line charts with a simpler library (even though it’s still powerful), we cut that code out of the bundle we have to ship to your browser. We’re sending 800KB+ of compressed/gziped, too much in our opinion, but we’re working on it 😀

Small changes that hopefully produce benefits long into the future.

Let us know if our updates aren’t working for you or are otherwise affecting your quality of life. Join us in the forum or on Discord in the adafruit-io channel with questions, comments, or suggestions. We’d love to hear from you!


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 13,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython 2019!

Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — A list of companies owned by Amazon. It’s big.

Wearables — Raid the kitchen

Electronics — Capacitor ESR

Biohacking — Vitamin-C + Gelatin for Accelerated Recovery

Python for Microcontrollers — Python snakes its way to the STM32, Serpente, and more!

Adafruit IoT Monthly — Adafruit IO Updates, RGB Stream Deck Message Panel, and more

Microsoft MakeCode — Welcome to the MakeCode Newsletter!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.