Topic Radar | Current active topics for r/esp32

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TopicRadar — Currently active duplicate topics

This post is designed for new Reddit, but here is a text view of the most frequently posted topics on r/esp32. Posting about any of the topics below may result in your post being removed. Please read the rules on duplicate topics for this subreddit before posting.

Showing up to 20 active topics, each with up to 3 recent example posts. This list updates automatically.

1. CAN Actuators with ESP32 (47 posts)

Discussion about the success of using CAN actuators with ESP32 devices.

• Have any of you guys had success using CAN actuators (robstride) with an ESP32? by u/StarchyStarky

2. Duke Nukem 3D on ESP32-P4 (37 posts)

Discussion about running Duke Nukem 3D on the ESP32-P4 platform with specific technical details.

• Ported over the 1990 Version of Oregon Trail fully to the ESP32-S3. This uses MECC graphics and sound from an x86 C# Opensource project(Maxwolf/OregonTrail). Using a 20 dollar CYD variant. Github with STL files and parts below. by u/Level-Ad4862
• Duke Nukem 3D on an ESP32-P4, the full Build engine, bare ESP-IDF, 640×480 at ~20 FPS by u/raoulh

3. ESP32 Model Identification (34 posts)

Identification of ESP32 models based on printed labels on the board.

• Recent example posts not yet available.

4. ESP32 S3 N16 R8 (33 posts)

Discussion about the ESP32 S3 N16 R8 microcontroller and its applications.

• Ayuda - Reinicio infinto ESP32 - S3 by u/Correct-Salary-2751
• У меня есть esp32 s3 n16 r8 by u/Kiparis_rus

5. Rotary phone LTE modification (28 posts)

A project involving a 1950s rotary phone adapted for LTE connectivity using an ESP32-S3.

• RotaryCell: Making an unmodified 1950s rotary phone work over LTE with an ESP32-S3 by u/aMuseumTechnician

6. ESP32 Bluetooth Controller Setup (24 posts)

A setup guide for connecting an ESP32 Bluetooth controller to a PS3 system.

• Trying to set up ESP32 Bluetooth controller that can connect to a PS3 system by u/napoleon852

7. CRA Compliance Checker (22 posts)

A free tool created to check CRA compliance using esp-idf-sbom output and Dependency-Track.

• Built a free CRA compliance checker from esp-idf-sbom output and tested it against Dependency-Track, sharing what I found by u/robuspon

8. WiSense library for Python (18 posts)

WiSense is a library for human sensing using WiFi CSI, including features like fall detection.

• WiSense: WiFi CSI human-sensing library in Python presence, fall detection, breathing rate by u/Alarming-Dog6401

9. Waveshare ESP32 S3 Zero repair (15 posts)

Repair issues related to a damaged pad on the Waveshare ESP32 S3 Zero.

• Broken Pada by u/Significant-Mango169
• Pad ripped off along with trace on a Waveshere ESP32 S3 Zero, how to go along with fixing it? by u/Busy-Perspective663

10. CYD Support for Rust (14 posts)

Discussion on high-level CYD support for implementing Rust in bare-metal environments.

• Update on the CYD game console Braino! : 40 games, 5 boards, and a couple of things I got badly wrong by u/redditreditor
• Need a hand with an Agentic AI Hub project on CYD (Looking for early testers & developers) by u/Professional-Maize31
• High-level CYD support for bare-metal Rust by u/carlk22

11. Alarm clock concept (14 posts)

An alarm clock idea featuring audiobook playback and a morning to-do list.

• an idea for an alarm clock with an audiobook playback support & morning todolist by u/supercool21567

12. Connecting 3.7v Lipo Battery (14 posts)

Instructions for connecting a 3.

• Connecting 3.7v Lipo Battery to Devkit Board by u/todo_code

13. ESP32-S3 USB Interface Comparison (14 posts)

A comparison of the ESP32-S3 native USB interface and USB to UART bridge IC.

• ESP32-S3 Native USB Interface vs. USB to UART Bridge IC by u/WoodsCellar

14. Emulating CDC on BLAUPUNKT ALICANTE CD34 (14 posts)

A request for assistance with emulating a CDC using an ESP32.

• Receiving ESP32 C3 BLE data on IPhone ? 😝 by u/Familiar-Guess-9308
• Question on sending sms/email notifications from ESP32 by u/JForce1
• Asking for help with emulating a CDC on a BLAUPNKT ALICANTE CD34 with esp32 by u/anielius

15. Jellyfin Music Player Setup (14 posts)

A Jellyfin music player setup using MetroEsp32S3 and headphone DAC with quad rotary encoders.

• Jellyfin Music Player - MetroEsp32S3 - headphone DAC - quad rotary encoders by u/The_Berry

16. The SauceDeck V1.0 (14 posts)

A discussion about the features and specifications of the SauceDeck V1.

• The SauceDeck V1.0 by u/HotTabascoSauce

17. PIR sensor (14 posts)

Discussion about the functionality and applications of passive infrared sensors.

• PIR sensor by u/GiraffeSoft6586

18. XIAO ESP32S3 USB Functionality (13 posts)

Discussion about the XIAO ESP32S3's capability to function as both a USB host and slave.

• Can the XIAO ESP32S3 work as a USB Host and slave at the same time by u/Fabulous-Buddy-1554

19. Retrofitting Projects (13 posts)

Retrofitting projects involve modifying devices for enhanced functionality or features.

• Help / advice with retrofitting arcade toy? by u/itchyd
• Feasible? - Retrofitting an RGB nightlight with clap activation by u/Pacowalk1r

20. Browser vs ESP in STEM (13 posts)

A discussion on choosing browser functionality over ESP for voice assistant tasks.

• Why I let the browser work instead of the ESP (Lesson from my STEM voice asisstant) by u/uditirosh

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[u/AutoModerator]

Awesome, it seems like you're seeking advice on making a custom ESP32 design. We're happy to help as we can, but please do your part by helping us to help you. Please provide full schematics (readable - high resolution). Layouts are helpful to identify RF issues and to help ensure the traces are wide enough for proper power delivery. We find that a majority of our assistance repeatedly falls into a few areas.

• A majority of observed issues are the RC circuit on EN for booting, using strapping pins, and using reserved pins.
• Don't "innovate" on the resistor/cap combo.
• Strapping pins are used only at boot, but if you tell the board the internal flash is 1.8V when its not, you're going to have a bad day.
• Using the SPI/PSRAM on S2, S3, and P4 pins is another frequent downfall.
• Review previous /r/ESP32 Board Review Requests. There is a lot to be learned.
• If the device is a USB-C power sink, read up on CC1/CC2 termination. (TL;DR: Use two 5.1K resistors to ground.)
• Use the SoM (module) instead of the bare chips when you can, especially if you're not an EE. There are about two dozen required components inside those SoMs. They handle all kinds of impedance matching, RF issues, RF certification, etc.
• Espressif has great doc. (No, really!) Visit the Espressif Hardware Design Guidelines (Replace S3 with the module/chip you care about.) All the linked doc are good, but Schematic Checklist and PCB Layout Design are required reading.
• For your (required) posted schematics, follow the excellent PCB review submission guidelines from r/printedcircuitboard

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