DEVIT V1 ESP32-WROOM-32 Development Board, 36Pins ESP32, ESP-32S 2.4GHz WiFi+BT Dev Module CP2102 for Arduino DOIT, with ESP32 Expansion Board

WHat a piece of junk. I bought 2 sets. In each IO14 was not connected to the IO14 pin! Good luck using a JTAG. Cost me 2 days to figure this mistake out. Pin IO14 is connected to air. ALso the first pin in the 3V3 row, as mentioned in the other 1 star review, is actually 5V. ALso GND is not the 3V3 GND at that column. This is wrongly labeled. So some surplus store obviously tries to get rid of wrongly manufactured PCBs. This is criminal and dangerous.

This is a great ESP-32 dev board with wireless functions. It works well with the Arduino IDE. Under Windows 11, there is an "optional" driver update required when you first plug in the board to a USB port. You have to go to the advanced tab in the Windows Update settings and explicitly tell it to install the Silicon Labs "CP210x USB to UART Bridge" driver. There is no exact match for the board in the board selection dialogue of the Arduino IDE. Selecting "ESP32-WROOM-DA" seems to work fine and it loads the code examples for both the dev board and the WROOM module. I had no trouble running various test sketches for the wireless module. The default "BLINK" sketch will not compile because the "LED_BUILTIN" variable is not defined for this series of boards. You need to add a statement to indicate that the LED is on pin 02. (see photo). The soldering on the expansion board is fine. There are no dry joints. I tested the pinouts on the dev board and the expansion board and I could not find any issues. All voltages are correct and properly labelled (see photo). This board uses 3.3v for most things. The 3.3v rails are clearly labelled in red on the expansion board. Ground pins are black. The very short 3-pin 5v rail is yellow. The individual pin connections are blue. This colour-coding is extremely helpful and makes it very difficult to make a mistake. I have really enjoyed working with this dev board and the expansion board and it has performed flawlessly for me so far.

The 5V Vin pin is actually connected to the next two outward adjacent pins that are supposed to be for the 3.3V and GND rails. Absolutely reckless/incompetent/dangerous to be mislabelling power pins, especially since there is zero documentation aside from these labels.

Especially on the break out board, the solder quality is very, very poor, with many pin showing signs of cold soldering. The kit does not come with a pig tail connector for power, which would be nice to include given there are many variants of this type of power connectors I don't understand why IO14 is not connected and I'd need to solder it myself. It it was intended to be optional, add a dip switch to the breakout board. On the breakout board, I could not find an output for 3.3V, only 5V. Not impressed with it at all, but the ESP32 board seems fine, it's just the breakout board that is quite bad.

As other reviewers noted, these seem to be manufacturing rejects sold as new. The breakout board i received had 5v shorted to ground and is useless. The esp32 worked fine on its own though.