---
product_id: 125299917
title: "KeeYees ESP32S ESP32 Development Board 2.4 GHz Dual Core WLAN WiFi + Bluetooth 2-in-1 Microcontroller ESP-WROOM-32 Chip for Arduino (38PIN Narrow Version, 2PCS)"
brand: "keeyees"
price: "RM105"
currency: MYR
in_stock: true
reviews_count: 9
category: "Kee Yees"
url: https://www.desertcart.com.my/products/125299917-keeyees-esp32s-esp32-development-board-2-4-ghz-dual-core
store_origin: MY
region: Malaysia
---

# Low-Power 40nm ESP-WROOM-32 Chip 2.4 GHz Dual-Core WiFi + Bluetooth 30-pin Narrow Form Factor w/ 4 Mounting Holes KeeYees ESP32S ESP32 Development Board 2.4 GHz Dual Core WLAN WiFi + Bluetooth 2-in-1 Microcontroller ESP-WROOM-32 Chip for Arduino (38PIN Narrow Version, 2PCS)

**Brand:** keeyees
**Price:** RM105
**Availability:** ✅ In Stock

## Summary

> 🚀 Power Your Next-Gen IoT Innovation with KeeYees ESP32S!

## Quick Answers

- **What is this?** KeeYees ESP32S ESP32 Development Board 2.4 GHz Dual Core WLAN WiFi + Bluetooth 2-in-1 Microcontroller ESP-WROOM-32 Chip for Arduino (38PIN Narrow Version, 2PCS) by keeyees
- **How much does it cost?** RM105 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/125299917-keeyees-esp32s-esp32-development-board-2-4-ghz-dual-core)

## Best For

- keeyees enthusiasts

## Why This Product

- Trusted keeyees brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Breadboard-Friendly:** Slim 30-pin design fits perfectly on standard 400-point breadboards with extra wiring space.
- • **Robust & Reliable Performance:** Proven track record with flawless operation across multiple batches and extensive user testing.
- • **Secure & Scalable Architecture:** Built on ESP-WROOM-32 with FreeRTOS for safe, scalable, and power-efficient embedded solutions.
- • **Seamless Dual-Mode Connectivity:** Effortlessly switch between WiFi and Bluetooth for versatile IoT projects.
- • **Developer-Ready with Lua & Arduino:** Supports Lua programming and Arduino IDE for rapid prototyping and easy development.

## Overview

The KeeYees ESP32S Development Board features a dual-core 2.4 GHz WiFi and Bluetooth microcontroller based on the ESP-WROOM-32 chip. Its compact 30-pin layout with 4 mounting holes ensures easy integration and secure installation. Designed for low power consumption with 40nm technology, it supports Lua and Arduino IDE programming, making it ideal for professional developers and makers seeking reliable, scalable, and versatile connectivity solutions for IoT and embedded projects.

## Description

desertcart.com: KeeYees ESP32S ESP32 Development Board 2.4 GHz Dual Core WLAN WiFi + Bluetooth 2-in-1 Microcontroller ESP-WROOM-32 Chip for Arduino (30PIN, 2PCS) : Electronics

Review: Both boards passed my simple initial tests - I had to install the CP210x USB-to-serial driver to get Windows 10 to see the device on a COM port. Also, when the Arduino IDE started trying to upload my program to the board, when the IDE output said "Connecting...", I had to press the right pushbutton on the board, for a couple of seconds, in order to allow uploading to occur. Other than those two not-serious gotchas, the board seems to work as expected. (I tested getting chip info, doing an http get via WiFi, and deep sleep with timer wakeup.) The chip is reported as model ESP32-D0WDQ6 Rev 1. Both boards work fine. Update 2022-11-23: I bought two more boards for a total of four. All 4 have functioned well without any known reliability problems. (I'm using WiFi, digital GPIO usage, internal LED, flash updates, NVS changes.) THESE THINGS ARE GREAT! Update 2022-12-08: I bought two more boards. 6 out of 6 have worked flawlessly. I wrote custom motion sensor software using PlatformIO...flashing from PlatformIO works flawlessly OTA or wired. Every pinout has behaved as expected. Update 2024-10-13: I've purchased five batches of 2 boards (10 boards in total) over the past two years, and all of them have worked flawlessly. They are 38-pin narrow boards (25.4mm/1in wide), unlike many of the other boards that are 2.54mm/.1in wider than this one. So these fit nicely on a 400 point breadboard, leaving a usable wire point adjacent to each pin on both sides of the board after it's been seated into the breadboard. They have 4MB of flash storage. Excellent quality/value.
Review: Works, reliable, flashes with no button pressing (on linux) - I got these to replace some nearly identical ones from a different seller which had super flaky wifi (it turned out due to counterfeit USB chip leaking high voltage to the ESP32). I'm happy to report that, despite having a no-name USB chip (CP2102 clone, I think) all the voltages measure as they should (unlike the other brand) and the units work so far flawlessly. I bought these from KeeYees this time because I had purchased some ESP8266s from them a long time ago which have worked great for years, and so far it looks like their ESP32s are similarly well-enough made. So, if you are scratching your head over which brand of this board to buy when there seem to be so many that are exactly the same: Beware they may be the same design but the components matter, and so far for me at least KeeYees has sent me good, working boards, spanning multiple years, which I can't say for some other random brands/sellers.

## Features

- This 30-pin version of the ESP32 board has 4 mounting holes, which will be very convenient for you to fix it when some projects need it.
- This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips ESP-WROOM-32, as well as the 40nm low-power technology.
- Support Lua program, easy to develop. Support of three modes: AP, STA and AP + STA.
- This module is safe, reliable, and scalable to a variety of applications.
- Technical Support: Our PDF tutorial is available on this page. Please pull down this page to find the tutorial: User Guide (PDF)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B9G74NNM |
| Best Sellers Rank | #988 in Single Board Computers (Computers & Accessories) |
| Brand | KeeYees |
| Customer Reviews | 4.4 4.4 out of 5 stars (893) |
| Date First Available | August 12, 2022 |
| Item Weight | 1.13 ounces |
| Manufacturer | KeeYees |
| Number of Processors | 2 |
| Operating System | FreeRTOS |
| Package Dimensions | 4.45 x 4.13 x 0.75 inches |
| Processor Brand | Espressif |
| RAM | SRAM |
| Series | ESP32S ESP32 Development Board |
| Wireless Type | 802.11bgn, Bluetooth |

## Product Details

- **Brand:** KeeYees
- **CPU Speed:** 0.24 GHz
- **Memory Storage Capacity:** 512 KB
- **Model Name:** ESP32S ESP32 Development Board
- **Ram Memory Installed Size:** 512 GB

## Images

![KeeYees ESP32S ESP32 Development Board 2.4 GHz Dual Core WLAN WiFi + Bluetooth 2-in-1 Microcontroller ESP-WROOM-32 Chip for Arduino (38PIN Narrow Version, 2PCS) - Image 1](https://m.media-amazon.com/images/I/71YcLPnoa3L.jpg)

## Questions & Answers

**Q: Is this 2 of the ESP32 chips?**
A: The products you will get are 2 x ESP32 Development Board, just like the first picture shows.

**Q: Does anyone use this with wled sound reactive firmware and max4466? could really use your help with the pins setup. thx!**
A: Get a board with better support. The pinout is wrong on this board so finding support for projects is nearly impossible.

**Q: Where is a schematic? need to understand why some gpio pins don't work as expected. p0 and p19 don't work, p2 works but has an on-board blue led.**
A: The PCB's silkscreen gpio is labeled different from the physical on-board gpio of the chip.

**Q: Has anyone had any luck getting micropython onto this board?**
A: Yes. Search for "Firmware for Generic ESP32 module"  (URLs not allowed here).  Download esp32-20210418-v1.15.bin from list under "Firmware with ESP-IDF v4.x"

## Customer Reviews

### ⭐⭐⭐⭐⭐ Both boards passed my simple initial tests
*by A***M on September 21, 2022*

I had to install the CP210x USB-to-serial driver to get Windows 10 to see the device on a COM port. Also, when the Arduino IDE started trying to upload my program to the board, when the IDE output said "Connecting...", I had to press the right pushbutton on the board, for a couple of seconds, in order to allow uploading to occur. Other than those two not-serious gotchas, the board seems to work as expected. (I tested getting chip info, doing an http get via WiFi, and deep sleep with timer wakeup.) The chip is reported as model ESP32-D0WDQ6 Rev 1. Both boards work fine. Update 2022-11-23: I bought two more boards for a total of four. All 4 have functioned well without any known reliability problems. (I'm using WiFi, digital GPIO usage, internal LED, flash updates, NVS changes.) THESE THINGS ARE GREAT! Update 2022-12-08: I bought two more boards. 6 out of 6 have worked flawlessly. I wrote custom motion sensor software using PlatformIO...flashing from PlatformIO works flawlessly OTA or wired. Every pinout has behaved as expected. Update 2024-10-13: I've purchased five batches of 2 boards (10 boards in total) over the past two years, and all of them have worked flawlessly. They are 38-pin narrow boards (25.4mm/1in wide), unlike many of the other boards that are 2.54mm/.1in wider than this one. So these fit nicely on a 400 point breadboard, leaving a usable wire point adjacent to each pin on both sides of the board after it's been seated into the breadboard. They have 4MB of flash storage. Excellent quality/value.

### ⭐⭐⭐⭐⭐ Works, reliable, flashes with no button pressing (on linux)
*by S***K on November 15, 2023*

I got these to replace some nearly identical ones from a different seller which had super flaky wifi (it turned out due to counterfeit USB chip leaking high voltage to the ESP32). I'm happy to report that, despite having a no-name USB chip (CP2102 clone, I think) all the voltages measure as they should (unlike the other brand) and the units work so far flawlessly. I bought these from KeeYees this time because I had purchased some ESP8266s from them a long time ago which have worked great for years, and so far it looks like their ESP32s are similarly well-enough made. So, if you are scratching your head over which brand of this board to buy when there seem to be so many that are exactly the same: Beware they may be the same design but the components matter, and so far for me at least KeeYees has sent me good, working boards, spanning multiple years, which I can't say for some other random brands/sellers.

### ⭐⭐⭐⭐⭐ Just received my first 2 units and both work great
*by W***T on June 23, 2023*

I just received my first two this afternoon, and uploaded several sketches to both. They work just fine. I like the little sticky tapes with the pin names on them. A few tips: 1) For those that complain about pressing the right-hand button to start an upload in the Arduino UI, this is very common, not a quirk in these particular boards. Not a big deal, really. Watch your sketch compile, then when it starts to upload, press the right-hand "boot" button for a few seconds. In my case, I hold the button until I see upload progress start, then let go. Nothing to it. 2) The on-board blue LED is connected to D2, by the way. Try the "blink" sketch first, and just change the default pin name or number to 2 instead of whatever the sketch default is. 3) When deciding what flavor of ESP32 board to select in the Arduino UI, I just use the generic "ESP32 Dev Module" and everything works fine for me. I have several other ESP32 modules, like the WROOM, and they all work with the Dev Module selection for me. Easy. 4) I also tried the very simple Wi-Fi server that can flash the on-board LED (no external connections needed) by going to Examples/WiFi/SimpleWiFiServer. Change the default pin 5 to pin 2 in several places, and then put in your home Wi-Fi SSID and your password. Enable the serial monitor for 115200 bps, and upload it. Once it connects, the ESP32 will tell you what its IP address is. Enter that IP address (like 192.168.1.123) in your phone or computer web browser, and you'll get a simple page coming from your ESP32 (which is now an HTTP server). The page tells you something like "click here to turn LED D2 on" (assuming you edited your sketch so that it says "D2" instead of D5) and a similar line to turn the LED off. Nothing to it, and you did this with zero hardware! 5) My modules did not have any labeling or silkscreen on them, but the included sticky labels are just fine. I stuck one set on the bottom of one module, and on the connector edge of the other. They are sticky enough that I'm not worried about them falling off. I really like these units, and will definitely buy more! I also bought a pair of the KeeYees breakout boards with screw terminals, and they perfectly match the pinout of these 38pin modules.

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*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-03-10*