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

This is insane value for the cost. The specs on this are completely ridiculous. It comes with a detailed Pinout Diagram and Schematic of the Circuitry. USB-to-UART, AMS1117-3.3v, VSPI (High-speed SPI bus mapped to MOSI {Clock-Speed up to 80MHz}), Touch Capacitive Pins, Digital-to-Analog & Analog-to-Digital Converters, WiFi & Bluetooth, etc. Capable of both “Master” & “Slave” modes. Common uses would be for TFT & OLED modules, SD Card modules, Sensors, Radios, Transceivers (lower ranges unless rigged with accompanying equipment), Transmitter (middle-man as “slave” unless low range and non-real time processing). Overall extremely exceptional buy if I have a need for another arises and they are still around this price it would be worth buying again.

I received a HiLetgo ESP32 board on Dec 31 2017. They are packaged quite well securely which I guess qualifies as "unfriendly" but better safe than sorry with these little gadgets. If you use Arduino IDE you will have to install the board library for this hardware using either git or downloading and manually extracting the zip file. If you ever dabbled with the little sister of this one (ESP8266) you should be able to get this done, although it is not quite as easy (no board manager as of 12/31/2017). After about 30 minutes setup I was off and running. Currently running a burn in test, requesting a page repeatedly. No errors and connects to the network fine so the fundamentals of this board appear good after about 18 hrs of continuous operation. In the past I spent a lot of time trying to interface one of the tiny ESP8266 modules with an Arduino, even with logic level converters in place and things communicating the whole thing feels rickety. The all in one ESP8266 modules are nicer but lack GPIO for any heavy lifting. GPIO wise the ESP32 gets closer to an Arduino UNO board than the ESP8266. Great for remote sensor monitoring/logging, display panels. The Adafruit HUZZAH32 boards are a little more feature rich and more expensive. Unless you use the specific features like battery charging these boards will be a dominant player IoT tool kit, either way a great addition.

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.

I am not good at programming, and I don't use the Arduino IDE app. If you re going to use this board it is a bunch easier to load VS-code and PlatformIO. Then take the time to learn how to write C++ code, Or steal code from everywhere else and modify it, like I do. I bought these controllers for the onboard IOT capabilities and the Bluetooth-BLE. As I have played with them I have found they are pact full of usefulness. I have been able to create a BME680 weather station that works through Thingspeak, A wireless relay, A DHT11 weather alarm, and several other projects. I used to use Arduino UNO's for most of my projects writing in the Arduino IDE. But since I loaded PlatformIO, I have learned so much more about library management and code assignment.. It is really worth the migration. Plus, if your interested in coding in general the VS Code is a great place to learn. It has so many good features that help you in your coding... You are obviously buying the Amazon products, and when the sensors aren't what you thought, or the LED strip isn't exactly how you foreseen it to be, and finding the right library to use with them is a hassle, the PlatformIO extension usually has the right library for your framework. PIO uses both ESP-IDE framework, and Arduino-IDE Framework so you have the ability to code the ESP32's in either format.. 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..

First, I am a total noob at this sort of thing. The board and the software all work fine once you puzzle it out. I decided to go with the platformio and JTAG debug method. This offers many hours of problem solving and googling just to get the blinky and hello-world examples to work reliably. I would take careful notes about a setup 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 arrangement. Some items of interest: I assumed that I should see COM ports in order for this to work NOT SO. The debugger device fools you it does have a COM port but if you do it correctly it has some USB port instead BUT that only works on interface 0. You will become friends with ZADIG. Some pins are special at power on - surprise GPIO12 ! Although the JTAG debugger board has COM port it seems like it cannot be used while debugging or uploading ?? I had to use a separate USB - USART dongle so you need to USB cables. If you don't want to move little wires around. The slightest change to anything (with a few exception) causes 100s of little programs to be recompiled taking several minutes. Does the Win 10 Antivirus like that ? no way - it is going to slow that down for you. Trying to remove some of the fancy WIFI, BlueTooth, HTTP code just for a little testing seems near impossible. Careful with that platformio.ini else many hours of puzzlement.

Un micro Controlador muy Maleable para el espacio que ocupa y los 5V es muy eficiente en lectura de sensores muy eficiente...

This is a great ESP32 development board, and at a great price. I can’t believe the functionality available in these small scale, powerful computers. At first, I had difficulty finding the correct driver for a Windows PC. Once that was solved I’ve been able to conduct experiments with sensors and motors, using MicroPython. Geek Fun!

I really wanted to like this board. I really did. Its a full $5-10 cheaper than other boards. But there's just so much wrong with it. Other reviewers have mentioned the obnoxious requirements that you have to press a button when flashing the board, and I'll reiterate how irritating that is. If you use something like ESPHome, which supports OTA updates, its SOMEWHAT mitigated, but not entirely, OTAs will sometimes just fail to apply, and you'll have to restart the board a few times and press the poorly labeled boot button (its labeled "100") My boards had issues with their I2C bus. I wired things up to the marked I2C pins, configured them in software, all to no avail. My I2C devices are working, I tested them with other boards and an oscilloscope, its just this thing refuses to cooperate. I didn't spend the time to see if they'd work on other, non I2C labeled pins, as I was just done with it and moved on to a board that I knew worked. Finally, there's the confusing pin-out labels. There are pin-out labels silkscreened onto the BOTTOM of the board, right next to where the headers normally face, so you can't see them when the board is installed into a socket, protoboard, breadboard, or the like. You'll probably spend a lot of time consulting the pin printout they include in each package, which is also confusing. It doesn't say GPIO, it says GIOP. And the other, ancillary labels, are weird too. You can generally decipher what they're saying, but you'll always be second guessing yourself. Don't waste your time with this board, just go with a slightly more expensive board from a known manufacturer, like Adafruit or Espressif themselves.

Received item is not what is on pictures, it should have 18 pins I got only 15, I found items similar or identical to this on a chinses site for 2 euro. On top of this it seems it's not working. Looks like a typical scam, when people resell items from Chinese sites here for 10 times of a price.

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 ;)

Works well with arduino iot platform. Blynk does not support this board.

Good quality controller. Works just perfectly.

Board works fine, though as some others have found, I needed to hold IO0 switch to upload from Arduino IDE. This can be solved by adding a 1uF capacitor from EN to GND. The details can be found if you search for "ESP32 Reset To Bootloader Issues on Windows."