ESP32-S3-RLCD-4.2

Board
by Wavesharewaveshare-esp32-s3-rlcd-42

Also known as: waveshare_rlcd42

Verify my boardCompareEdit on GitHub
Flash this board — 5 firmware options · Unverified
ESP32-S3-RLCD-4.2 pinout
Pinout

Specifications

Radiosinherited from ESP32-S3

Wi-Fi
Wi-Fi 4 · 2.4 GHz
Bluetooth LE
BLE 5
Bluetooth Classic
no
802.15.4
no

USB

Native USB
yes

Board

Battery connector
yes
Charging
yes

Display & extras

Display
4.2in 300x400 RLCD ST7305 (reflective, black/white)
Extras
sd-cardmicspeaker
Built onESP32-S3-RLCD-4.2 BoardESP32-S3 SoC

A 4.2-inch reflective-LCD board on an ESP32-S3 (16 MB flash, 8 MB PSRAM) with dual microphones, a speaker, an 18650 holder and a TF-card slot.

Firmware for this board

Unverified

  • draftlingUnverifiedmultirelease .bin
    Flash draftlingrelease .bin

    Unverified esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

other

  • ESP-Claw For StickS3declaredmulti
    Flash ESP-Claw For StickS3guided

    declared esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

  • NucleoOsdeclaredmulti
    Flash NucleoOsguided

    declared esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

  • Stackchan-MCP 4 Any LLMdeclaredmulti
    Flash Stackchan-MCP 4 Any LLMguided

    declared esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

  • XiaoZhi ESP32declaredmulti
    Flash XiaoZhi ESP32guided

    declared esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

Notes

  • Product page: "RLCD AIoT development board based on ESP32-S3"; "Built-in 512KB Static RAM, 384KB ROM, with integrated 16MB Flash and 8MB PSRAM"; the page does not name the ESP32-S3 sub-variant (soc only)
  • Display: "4.2inch RLCD, 300 x 400 resolution, features reflective imaging and no backlight required"; Driver IC "ST7305"; display color "black, white"
  • Onboard "dual-microphone array", speaker, "PCF85063 RTC chip and SHTC3 temperature & humidity sensor", "18650 Lithium Batt holder", "Lithium Batt charging and discharging management circuit", "TF card slot", "programmable KEY and BOOT side buttons"
  • USB connector type is not stated in the product text captured (omitted); the wiki page for this board was still a placeholder on the verified date
  • aka "waveshare_rlcd42" is the device token draftling uses for its release binaries

Verify my board

Reads the connected chip over USB and checks it against what esp-atlas cites for ESP32-S3-RLCD-4.2 — over Web Serial, no backend, nothing leaves your browser.

In-browser verify needs Web Serial: Chrome or Edge on a desktop. Safari, Firefox and phones cannot do it.

Serial monitor

Not connected.