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SSD1306 display drivers and font rendering

(subalpinecircuits.com)
76 points todsacerdoti | 1 comments | 14 Apr 25 17:08 UTC | HN request time: 0.201s | source
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arghwhat ◴[14 Apr 25 17:54 UTC] No.43684165[source]▶
Go for the SPI version, which is the same chip but just s different breakout board.

Many ESP32's can only do 400kHz I2C, whereas their SPI peripheral can often do 80 MHz or more (although you wouldn't want to go that fast here). 400kHz sort of works, but if you also want to handle other I2C devices it can easily become a problem.

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generj ◴[14 Apr 25 18:04 UTC] No.43684297[source]▶
I2C is nice because it is (with Adafruit and Sparkfun’s Stemma QT/Qwiik) literally plug and play for beginners, with a wide variety of sensors available.

Plus not needing to dedicate a control pin per device added to the bus. Though of course if data throughout is an issue SPI is better than I2C.

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1. hadlock ◴[14 Apr 25 20:28 UTC] No.43685955[source]▶
If you're going to do I2C just get an LCD display. This OLED can be driven at 150fps by simple devices like an ardunio which is where it really shines - super crisp, high contrast, smoove as buttah graphics for realtime readouts etc. OLED over SPI is really visually impressive stuff and effectively 0 latency. Using the SSD1306 for static displays over I2C is almost a crime.