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

Love it! Works super well, has plenty of space for code, and is fast. I'm programming it with the Arduino Cloud editor, which now supports OTA program code updates. So easy to use, there's no need to keep reconnecting to the computer for code updates.

Im completely new to ESP32s so it took some setup to run with Arduino IDE and Arduino cloud and there isnt much about this particular board on how to do so. With some finagling I managed to make it work with the following:-Make sure to install cp210x driver from the Silicon Labs website.-For Arduino IDE, go to the board manager and search/download the esp32 library from espressif and select "ESP32 Dev Module" when selecting the board.-For Arduino cloud, similarly set up your device by selecting "ESP32 Dev Module" and make sure you have the Arduino Cloud Agent installed on your PC-When uploading code make sure to hold the "100" button when the output monitor shows "connecting..." you dont need to hold it any longer once it starts writing.I've only managed to make a hello world display to test it, and will update further if any other issues or concerns arise.

I've bought about a dozen of these now from HiLetgo and they all have been well made and reliable. This is the 38 pin version (beware, some variants have fewer pins- unless that's what you want). The board is just narrow enough to leave a row of sockets exposed on either side on a typical solderless protoboard. ESP32 offers a lot in a small package. With vendors price gouging for anything RaspberryPi and to a large extent most MCU/SBC boards during this time of chip shortages, the ESP32 remains reasonably priced.Only complaint is that HiLetgo uses a linear voltage regulator, which is not that efficient, so unless you can supply the board with stable, regulated 3.3v from an external source, you won't get the super low µA sleep currents that the ESP32 is capable of. Can't really fault HiLetgo on this, since it's really hard to find boards with high efficiency regulators. If you know what to look for and the product pictures are accurate, you easily spot the boards with the inefficient regulator (hint: it's the package with the 3 pins on the left and large pin/bar on the right- the third largest component on the board after the ESP32 and USB modules). I now see that HiLetgo sells the more efficient board for almost the same price (ASIN B077KJNVFP)- or look for WeMos/LoLin.

Bought this board looking for something with better wifi than some other esp32 boards I tried and the wifi is better. I can control the board from my bedroom upstairs when it's located in the closet of the downstairs laundry room. The pins are very different from the last board and aren't exactly written on the top of the board like my last controller. I do feel this is a much more stable controller though with better wifi, but keep the paper of pin mapping it comes with. That will be your friend. That's my only complaint is that I have to look at the map and count pins. I'm using this to power led strips on my stairs using wled.Update: 4/17/24 - still super happy with this board. The wifi is truly phenomenal compared to the last dev boards I had. I was just laying in bed upstairs setting times and messing with settings in wled for it when it's downstairs in a closet. The last boards I had could not seem to stay connected for some reason and half the time I couldn't open wled bc of that. This boards to the wifi once on and stays connected. Worth the extra money in my opinion.

There isn't much to say as its a small ESP32 development board with WIFI and Bluetooth that does the trick -- the ESP-WROOM-32 is an older MCU but if you want ESP32 with the bells-and-whistles of ESP32 MCU but in a smaller format this does the trick. It is a bit wider than a Nano so keep that in mind when mounting it on a breadboard -- you won't have as much space to work with.

Very small piece of equipment. Easy to use really, once you understand the coding of ardiuno. It was very affordable so that was a plus. The wifi connectivity was strong and on point, very good.

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.