https://github.com/davidramiro/e2e-latency

⌛ measure e2e system latency with an arduino and a photo diode
https://github.com/davidramiro/e2e-latency

arduino atmega latency-tester

Last synced: over 1 year ago
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⌛ measure e2e system latency with an arduino and a photo diode

• Host: GitHub
• URL: https://github.com/davidramiro/e2e-latency
• Owner: davidramiro
• Created: 2024-03-09T18:25:50.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2024-03-18T11:59:46.000Z (over 2 years ago)
• Last Synced: 2025-03-24T06:56:41.681Z (over 1 year ago)
• Topics: arduino, atmega, latency-tester
• Language: C++
• Homepage:
• Size: 138 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# e2e-latency

Get a rough estimate on end-to-end (mouse-to-screen) system latency by attaching a photo resistor to your screen and measuring response time with an Arduino.

## BoM

- Arduino Pro Micro (ATmega32U4)

- SSD1306 I2C OLED screen

- Photoresistor module with analog output, e.g. KY-018 or G5516/LM393

## Wiring

![Wiring](doc/schema.png?raw=true)

## Usage

- Set up a repeatable test scenario where a mouse movement would cause a screen change (e.g. FPS game)

- Tape the photo resistor to the screen

- Connect USB

- Open a serial monitor with 115200 baud, e.g. `screen /dev/ttyACM0 115200`

Test starts 5 seconds after connecting USB. It will do 10 cycles, print the average latency and repeat until disconnected.