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HiLetgo ESP-WROOM-32 ESP32 ESP-32D Development Board 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller Processor Integrated with Antenna RF AMP Filter AP STA for Arduino IDE

4.5 4.5 out of 5 stars 1,376 ratings
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Amazon's Choice in Single Board Computers by HiLetgo

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Purchase options and add-ons

Brand HiLetgo
CPU Model Tegra
CPU Speed 2.4 GHz
Connectivity Technology Wi-Fi
Wireless Communication Standard Bluetooth

About this item

  • 2.4GHz Dual Mode WiFi + Bluetooth Development Board
  • Ultra-Low power consumption, works perfectly with the Arduino IDE
  • Support LWIP protocol, Freertos
  • SupportThree Modes: AP, STA, and AP+STA
  • ESP32 is a safe, reliable, and scalable to a variety of applications

Additional Details

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 3.78 x 2.36 x 0.71 inches; 0.71 ounces
  • Item model number ‏ : ‎ 3-01-1287
  • Date First Available ‏ : ‎ April 22, 2017
  • Manufacturer ‏ : ‎ HiLetgo
  • ASIN ‏ : ‎ B0718T232Z
  • Customer Reviews:
    4.5 4.5 out of 5 stars 1,376 ratings

Product Description

1

The ESP32 integrated with Antenna switches, RF Balun, power amplifiers, low-noise amplifiers, filters, and management modules, and the entire solution occupies the least area of PCB. 2.4 GHz Wi-Fi plus Bluetooth dual-mode chip, with TSMC Ultra-low power consumption 40nm technology, power dissipation performance and RF performance is the best, safe and reliable, easy to extend to a variety of applications.

Package included:

1 * HiLetgo ESP-WROOM-32D Development Board

If it cann't get bluetooth working. Using Node32 as the Board selection. To reference GPIO pins in code use just the number, for example "digitalWrite(13, HIGH)" sets GPIO13 high. The built-in LED to GPIO2.

HiLetgo ESP-WROOM-32

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
1,376 global ratings

Customers say

Customers like the value, description and compatibility of the single board computer. For example, they mention it's a great product, it has a dual core CPU and is quite powerful for the price point. Some appreciate the diagrams and schematics provided. That said, some complain about the connectivity issues and the pins. Opinions are mixed on performance and ease of use.

AI-generated from the text of customer reviews

97 customers mention74 positive23 negative

Customers like the quality of the single board computer. They mention that it is well built, reliable, and a solid platform for development. Customers also say that the MCU is impressive and has good fundamentals. They also say the build and size are nice. Overall, customers are happy with the quality and functionality of the product.

"...Got a great project box for this and it looks so cool sitting on the desk! There are so many fun projects for ESP32...." Read more

"...The board works great and it looks well built. I liked the readable schematics too...." Read more

"...about a dozen of these now from HiLetgo and they all have been well made and reliable...." Read more

"...This is completely unacceptable - no busy developer is going to do that. If I build stuff like that, I lose my job...." Read more

32 customers mention29 positive3 negative

Customers appreciate the value of the single board computer. They say it's well made, cheap, and powerful for the price point. Customers also mention that it has a dual core CPU and a boatload of IO.

"...SBC boards during this time of chip shortages, the ESP32 remains reasonably priced...." Read more

"Good price, and will upload a sketch if you hold down the "IO0" button for a second or so when it first begins to upload...." Read more

"This is a great board for ESP-32 prototyping/building at a very good price. Good parts: Seems well made and worked great...." Read more

"...The speed is impressive. I found it amazing to have a low-cost microcontroller with multiple cores that supports multitasking in the Arduino..." Read more

23 customers mention19 positive4 negative

Customers like the compatibility of the single board computer. They mention that it fits nicely on a small breadboard, has the right spec size, and is narrow enough to fit into a standard breadboard. The compact design has nothing sticking out over the board and does allow for easy breadboarding. It's compatible with normal ESP frameworks such as Arduino and NodeMCU ESP-32s. Customers also say that it's small but powerful and can be found in a tiny and cheap package.

"...ESP32 offers a lot in a small package...." Read more

"...several HiLetgo modules in the past, (2) These are smaller than many of the other boards; as a result they can be used on a single breadboard and..." Read more

"Good esp32 but it’s a little different from other and i recommend to check the image for guidance on the pins" Read more

"...Apart from that, this board is awesome. It's narrow enough to fit into a standard breadboard with open holes on each side..." Read more

16 customers mention12 positive4 negative

Customers like the description of the single board computer. They say it includes a much better pinout diagram and schematic than they have seen for these boards. They appreciate the detailed datasheet and large pin out diagram on the back. Customers also mention that the schematic is readable and the relevant circuit diagrams and board pinouts are included. Overall, customers are happy with the documentation and the accurate description.

"...It is also impressive that an acutal READABLE schematic is included, along with a large photo of the board pinout...." Read more

"...Compatible with NodeMCU ESP-32s, which means easy to find diagrams and compatible with Arduino IDE...." Read more

"...You will be spending a lot of time fighting with incorrect docs, buggy board installation issues, API differences and overall headaches...." Read more

"...Fortunately it came with a printed pin out diagram so you can 'count' to the pin you want!" Read more

125 customers mention83 positive42 negative

Customers are mixed about the performance of the single board computer. Some mention that it works well, while others say that it wouldn't program correctly, the code wouldn' t run, and the sketch doesn't always start running when the board is powered-up.

"Chip worked great after installing correct drivers ...." Read more

"...this as a Bluetooth module for Home Assistant and it has been working great and took about five minutes to set up with ESP prebuilt bluetooth program." Read more

"...when I use an external 3.3V power supply to power the board, my code won't run. The 5V red led turns on and the IO2 blue led keeps blinking...." Read more

"Worked well for my project...." Read more

44 customers mention21 positive23 negative

Customers are mixed about the ease of use of the single board computer. Some mention it's super easy to set-up and work with, with no struggles or mysteries. However, others say that the lack of instructions and complicated to use make programming it a pain. The initial setup required some research and the documentation is a challenge.

"...Using it with an LD2410 for presence detection. Quick and easy setup in Home Assistant & ESPHome...." Read more

"I don't understand. If you are selling a product that requires SPECIAL INSTRUCTIONS, like, to make it work somehow you need to push the button that..." Read more

"...No struggles, mysteries, or obscure instructions, and no peculiarities or non-standard features...." Read more

"...In all the are a pain to work with, but they are so much more versatile than Most Arduino products, and not even as pricey as a PI.." Read more

38 customers mention10 positive28 negative

Customers have connectivity issues with the single board computer. They mention that they get connection error messages, link errors, and compile errors while uploading. They also say that the board loses WiFi connection and the Arduino IDE is unable to connect automatically. Some customers also report that the USB connection and serial connector failed after a month.

"...using different ESP32 that worked , but the new ESP32 would not connect to the Arduino IDE ." Read more

"1. The serial connector failed after a month...." Read more

"...I get good connectivity throughout my entire house (I tested it as some reviews for other ESP32 boards complained about bad WiFi reception)...." Read more

"...that seem to work then hours later I would get oodles of connection error messages/link errors/compile errors for what seemed like the same..." Read more

36 customers mention9 positive27 negative

Customers are dissatisfied with the pins on the single board computer. They mention that the pin labels are not visible from the top of the board, and the pinouts are silkscreen printed only on the bottom of the module. They also say that there are no pin numbers or product identification on the board. Overall, customers find the pin out to be different compared to similar boards.

"...The only slight inconvenience is that there are no pin labels on the top of the board..." Read more

"...Cons:* The pinout is only printed on the bottom of the board, which makes it totally useless once inserted into a breadboard.*..." Read more

"...The board works great and includes a printout with a pinout for the board itself and schematics of the important chips that were used, which was..." Read more

"...I really wish the pins were labeled like I see on other esp32 boards...." Read more

Must do "dance of the buttons" to download code
4 Stars
Must do "dance of the buttons" to download code
This board appears to be very well made. It is also impressive that an acutal READABLE schematic is included, along with a large photo of the board pinout. However, there are problems.Like many of these boards by various vendors, it does not go into program mode without the irritating requirement of pressing the EN and IO0 (S1/S2) buttons--the infamous "button dance". The problem is that there is a race between the EN and IO0 signals generated by the USBtoTTL DTR/RTS signals. SOLUTION: add a 15-22uf cap around S1 switch (see photo). That provides enough delay between signals for the chip to go into download mode, but gives rise to problem #2: The RTS line can not reset the chip (start the program) after downloading is complete because the short reset pulse does not discharge that big cap we just added. SOLUTION: Place a 200 ohm resistor from the EN pin to the top of S1 (photo). The bottom lead may be soldered to the leg of the added cap. If you don't want to do this step, then simply pressing S1 will reset the device and start the downloaded program.After applying the described mods to the board, I am able to consistently download at 921600 baud followed by an auto reset to begin the program--all completed in a hands-off mode. This was tested with the Espressif development environment as well as Arduino.
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Reviewed in the United States on July 18, 2020
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5.0 out of 5 stars No Problems-And They Fit on a Standard Breadboard
Reviewed in the United States on July 18, 2020
There are a number of ESP-32 dev boards, and I was completely new to these (last board I used was an Arduino AT-Mega 2650). I had tried to use an ESP8266 for my current project, but discovered there were not enough usable GPIO pins on the 8266 boards. I chose these HiLetgo boards for three reasons: (1) I had good experience with several HiLetgo modules in the past, (2) These are smaller than many of the other boards; as a result they can be used on a single breadboard and still expose a socket on each side, and (3) They have more Gnd and Vcc pins than some of the other boards. Upon receiving the boards (in 24 hours with Prime), I used instructions published by Random Nerd Tutorials (an excellent source of detailed information) to install these on my MacOS/Arduino 1.8.8 IDE. I had both modules up and running the demo software within 10 minutes, without any problem. They upload at full speed (921,600 Baud); I am told that many of the other boards will only do 115,200. The only slight inconvenience is that there are no pin labels on the top of the board (there was no room to print them, since the board is smaller than many of the others). They are labeled on the bottom, however, and accompanied by a large diagram of the pin-out from the top view. These have plenty of GPIO pins, and I am very satisfied with them so far. No struggles, mysteries, or obscure instructions, and no peculiarities or non-standard features. This appears to be a solid platform for our development.
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Reviewed in the United States on January 13, 2024
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Top reviews from other countries

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Edgar Trujillo
1.0 out of 5 stars Las especificaciones de las fotos no corresponden, datos erroneos
Reviewed in Mexico on September 24, 2021
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Edgar Trujillo
1.0 out of 5 stars Las especificaciones de las fotos no corresponden, datos erroneos
Reviewed in Mexico on September 24, 2021
Las especificaciones de las imágenes no corresponden, dice que mide 25.4 mm de ancho x 48.26 mm de largo y de 18 pins; sin embargo llegó de 28.5 mm de ancho x 51.5 mm de largo y trae 15 pins.
Por eso lo compré, por las medidas.
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One person found this helpful
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Dmytro
5.0 out of 5 stars Funciona como deveria
Reviewed in Spain on January 6, 2023
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Dmytro
5.0 out of 5 stars Funciona como deveria
Reviewed in Spain on January 6, 2023
Um bom produto. Eu o uso como um proxy Bluetooth para HA. Solução simples e barata para pequenos projetos: sensores, etc.
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Aurore
5.0 out of 5 stars Module wifi et bluetooth peu cher et puissant !
Reviewed in France on December 29, 2019
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Aurore
5.0 out of 5 stars Module wifi et bluetooth peu cher et puissant !
Reviewed in France on December 29, 2019
Acheté pour tester afin de réaliser une "station météo" avec de multiple capteurs (afin d'en avoir dans chaque pièce de la maison et à l’extérieur). Ce module rend la fabrication d'objets connectés relativement facile grâce à l'IDE arduino et tout son ecosysteme.
J'ai pu réaliser une version brute de ce que je cherche à faire en moins d'un après midi, malgré aucune expérience au préalable avec l'ESP32, en utilisant des librairies préécrites et un peu de logique.

Cela permet d'imaginer une multitude de projets connectés pour les futures journées pluvieuses ;)
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Cliente Amazon
5.0 out of 5 stars Potente, ad un piccolo prezzo
Reviewed in Italy on December 16, 2019
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Cliente Amazon
5.0 out of 5 stars Potente, ad un piccolo prezzo
Reviewed in Italy on December 16, 2019
Ho acquistato questo modulo ESP32 HiLetgo per testare le capacità di questo chip. La confezione che arriva contiene sia lo schema della scheda che il pinout. I piedini sono già saldati sul circuito e li stessi sono protetti da un rettangolo di polietilene per non venire danneggiati durante il trasporto.
Ho testato la funzionalità “dual core” eseguendo due processi contemporaneamente, ed il tutto ha funzionato alla meraviglia. Incredibile per un modulino così piccolo ed economico!
La programmazione tramite l’IDE Arduino funziona senza problemi (bisogna però installare le librerie, in rete si trovano esaurienti spiegazioni e l’operazione richiede pochi click). Lavorando in Windows sarebbe necessario premere il tasto reset ogni volta che si vuole caricare il nuovo codice a causa di un bug nel driver usb (non c’entra il modulo ESP32). Per ovviare l’inconveniente è comunque sufficiente aggiungere un condensatore da 100nF tra il piedino “EN” e massa. In questo modo l’upload del codice è automatico. Durante i test ho scelto come tipo di modulo, nell’IDE, sia “ESP32 Dev Module” che “DOIT ESP32 DEV KIT V1” ed entrambi hanno funzionato correttamente.
Il modulino costa appena di più di altri siti noti, ma c’è il grande vantaggio che arriva in 2 giorni e non in 1 mese e mezzo.
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3 people found this helpful
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Ravi Karoria
5.0 out of 5 stars Quality product...
Reviewed in India on August 29, 2019