# GUITION rotary encoder upgrades to ESP32-S31 with RISC-V, WiFi 6 and Bluetooth 5.4

> **Key takeaway:** The GUITION JC3636F118C-I-YR1 rotary encoder with 1.8-inch touchscreen has been updated from ESP32-S3 to the newer ESP32-S31 RISC-V SoC, adding WiFi 6, Bluetooth 5.4, and 802.15.4 for Zigbee/Thread/Matter.

**Published:** 2026-10-22T00:00:24+00:00 
**Source:** CNX Software 
**Category:** open-hardware 
**Canonical URL:** https://fosswire.org/news/guition-rotary-encoder-upgrades-to-esp32-s31-with-risc-v-wif.html 

## Summary
GUITION has refreshed its smart rotary encoder knob with the ESP32-S31NRV16 SoC, replacing the previous ESP32-S3 model. The device keeps its 1.8-inch 360×360 round touchscreen and CNC knob with haptic feedback, while gaining faster RISC-V cores at 320 MHz, 16MB PSRAM, and expanded wireless support including WiFi 6 and Bluetooth 5.4 with LE Audio. It ships with demo firmware including a music player, video player, and spectrum analyzer, and supports development in Arduino IDE, ESP-IDF, and MicroPython.

## What's new in the ESP32-S31 upgrade
- **SoC**: ESP32-S31NRV16 with dual RISC-V cores (HP RV32IMAFCP @ 320 MHz with FPU/SIMD, plus LP core), replacing Xtensa-based ESP32-S3
- **Memory**: 512 KB SRAM, 32 KB low-power SRAM, 16MB PSRAM — unchanged from prior model
- **Wireless additions**: WiFi 6 (802.11ax), Bluetooth 5.4 with LE Audio and direction finding, 802.15.4 for Zigbee/Thread/Matter support
- **Display**: 1.8-inch round TFT, 360×360 resolution, ST77916 SPI driver, CST816 capacitive touch controller
- **Audio**: PCM5100APWR speaker, MSM261D4030H1CPM MEMS microphone
- **Storage**: 16MB SPI flash, MicroSD slot for WiFi config, music, or MJPEG playback
- **USB**: Type-C with orientation-sensitive dual mode — reverse for file transfer, normal for firmware programming
- **Power**: ~1.3W consumption, optional rechargeable battery (capacity unspecified)
- **Development**: Preloaded demos include LVGL-based players and Xiaozhi voice assistant; ESP-IDF 6.1.0 samples provided, Arduino folder currently empty

## Why it matters
The ESP32-S31's RISC-V architecture and expanded wireless stack make this knob more suitable for Matter-compatible smart home controllers, though the immature firmware ecosystem may slow adoption for production projects.