DIY Wireless Quiz-Buzzer (ESP32 LOLIN / ESP-NOW)

Short description: Turn your game nights into a real TV show! This is a compact, wireless quiz buzzer based on the ESP32 Lolin 32 Lite. It reacts extremely fast and is battery-powered.
 

Why this buzzer?

• No delay: Thanks to ESP-NOW radio technology, there is no noticeable delay – whoever presses first, wins!
• Economical: Thanks to Deep Sleep Mode, the small 250 mAh battery lasts for a long game night
• Ergonomic: The housing is designed so you can comfortably hold it, with your thumb ready on the button.
• Easy assembly: The housing is securely closed with 4x M2 screws.
• Central unit: For the corresponding receiver housing, see https://makerworld.com/en/models/2193327-led-cube-number-of-people-customizable

Additionally required hardware:

• ESP32 Lolin 32 Lite
• LiPo battery (approx. 250 mAh with JST connector)
• 12mm push button
• 4x M2 self-tapping screws (10 mm length)

Software & Instructions: You can find the corresponding code for the buzzers and the central unit (the LED cube) as well as a detailed tutorial on my website ESP32 Project: Quiz Buzzer – Who presses first – Prilchen Laps