MELIFE2 Pack for ESP32 ESP-32S Unassembled Development Board 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller Processor Integrated with ESP32s Antenna RF AMP Filter AP STA.

Bought the 2 piece version works out of the package with the Arduino IDE as a generic ESP 32. Run a few of the examples (Webserver, board info, blinker, etc.) and all is working fine.My bad i did not check this board is not breadboard friendly, meaning you do not get space on a regular breadboard to plug in things on the pins since the board is too wide. Anyhow you live and learn :)

Bought one of these to mess around with some IOT microcontroller applications. I learned a lot about backend dev, databases and REST protocol through the projects built with it. These are some of the cheapest ESP32 dev boards you can get, and connect easily through USB to program via your favorite software. This pack has 2 which is awesome because I had one for myself and one for my brother both of us loved engineering and playing around with micros. I would definitely buy them if you are looking into messing around and getting your hands dirty with IOT or just generic microcontroller projects as well.Keep in mind this is the ESP32 with two cores, so you can also practice how to deal with memory sharing and interrupts and data hazards that may occur when utilizing both cores. It is awesome because you can essentially dedicate one core to just networking and handle all the I/O with the other core simultaneously- really awesome learning oppurtunity!

I am new to microcontrollers and ESP32. These modules work great and I have been able to make a few projects easily. Its a great low-cost way to add Wifi control to a project. I also like there are a lot of resources available and programming languages for ESP32s. I recommend trying out the Espruino / Javascript firmware if you don't have a lot of microcontroller programming experience.Minor issues:- Watch out for USB charger cables that do not have data pins. Multiple times this got me, I spent hours trying to fix a communication issue caused by a non-data cable (this is not the fault of the device, but of those who make usb cables).I wish the headers did not come pre-soldered. I wish it included the headers and gave the option to put them in or not. It would be better to use my own female headers for some projects. On many projects, not all of the headers are needed- Board is too wide for standard breadboards, I can get by with putting one side in and using dupont style female jumpers on the other but it's not ideal. All ESP32 boards are too wide in my option, but there is always a work around.- I have had some issues with WIFI stability. I have an application where I want it to stay connected (and re-connect) when needed. However, it only seems to re-connect once. It will remain connected for a few weeks but eventually I'll have to cycle power. I have had to program in an auto re-boot everyday to get around the WIFI issue.I first tired flashing with Python and was able to get a simple project working quickly. However, I have switched over to Espurino which works with Javascript. Espruino seems to handle repetitive timed tasks better with it's setInterval and setTimeout functions. The best part of Esprunio is that I can quickly send a single line of code to the the Terminal and see how it works without compiling an entire C program.

As best I can tell these are clones of the DOIT ESP32 DEVKIT V1 board, at less than half the price - so 5 stars on value for the money, if you are ok using a Chinese clone. Quality is not 5-stars (sub-par printing on the PCB for example) but functional - time will tell on reliability.No documentation is included - I was able to download a script from the Arduino IDE by selecting the DOIT board type in the IDE. After I sent an email to address indicated in the product description, I got a photograph with a much-needed pin-out (much needed because the printing on the PCB that labels the pins is partly illegible) and support files. Wish they included this as a link in the product description or included it in the packaging - why should I have to send am email to get this needed info?As others have said - this board is too wide to fit in a single breadboard pad/strip, and this is same situation with the DOIT original. However, if you straddle the two-row power rail strip between two adjacent breadboard pad/strips (not sure correct breadboard terminology here), as I've shown in the photo, it works. But it will NOT work with a single breadboard strip.

(Actual purchase was the headerless version since I'm solder-literate and may want to use through-headers but the header-included style has all of the traffic.)Neither dev board will accept an upload. Same results with the Arduino IDE and with PlatformIO. This is as expected since both rely on esptool to handle the upload.Scoped the EN and BOOT lines; both toggled as expected. Hooked up a logic analyzer to the board and a serial port monitor to the USB-serial interface. DTR and RTS are driving EN and BOOT but the board only ever replies with the module's status dump (first image). Tried holding BOOT during the upload (second image) just in case a timing glitch was sliding it into SPI mode. No joy. Same results.The third image is a screenshot from the serial monitor. The upper (table) view contains the DTR and RTS toggles and the start of the setup for the programming preamble. The lower (terminal) view has interleaved data from the dev board (in cyan) and to the dev board (in magenta). The esptool utility keeps sending out its preamble / sync burst (ASCII 'U' is 0x55 i.e., 01010101) but the dev board only wants to chat about the module status.Update. The reason the module failed to program is seen in the fourth picture. Two of the castellations on the ESP-WROOM-32 module, at 25 and 26, were not soldered to the carrier board. Castellation 25 is IO0, also known as BOOT. No /BOOT state, no bootloader. Add some magic solder and Bazinga! Check your boards, people; a couple of the other castellations were iffy.

Being a total NOOB, I found this was an amazing device and simple to setup. Flashed with Micropython using Thonny on my Windows laptop. Had the onboard LED flashing in a few minutes. Will use them as a pair in my project.

No auto-upload through either VSCode or Arduino IDE. The DTR isn’t really working and you have to press the reset button to upload a program. Other than that works perfectly as Wifi IOT device.