3PCS ESP32 Breakout Board GPIO 1 into 2 Compatible with 38 Pins ESP32S ESP32 Development Board 2.4 GHz Dual Core WLAN WiFi + Bluetooth 2-in-1 Microcontroller ESP-WROOM-32 Chip for Arduino

Does exactly what it intends and fits the 38pin esp32 no problem. I'm using 2 of them in projects that are on 24/7 and i should really move to a proper project board but they have ben faultless so far.

I have used the Keyees many times but this looked like a better per unit price for what looked like the exact same product. For all three that arrived didn't fit any of a dozen or so ESP32 NodeMCU 38-pin narrow, nor did it fit the wide version which is quite a bit wider and requires a separate terminal (which I have for my wide ones). I know there has been a lot of shenanigans in regards to the pinouts, number of pins, and board dimensions. So this may be unfair to the vendor here. Yet I can't help but wonder why every other brand claiming ESP32 38-pin narrow version all mix and fit with other dev boards. And in my attempt to order at least one of each variant of ESP32 to understand the pros and cons, I have no board that fits correctly. I thought about simply returning it, but if you are willing to roughly handle both the header pins and the black inner terminal block, I was able to force the boards in without breaking of the connections. So you could say, "well, they still kind of work." The vendors selling these really need to use more precise terms to describe the product, including accurate measurements, and the measurements of the ESP32 dev board that fits. KeeYees though a little pricey sell a pair of breakout boards and a pair of ESP32-narrow-38 pin bioards that fit and work perfectly. SO I just ordered my third pair of those. Much more than buying from Aliexpress, but many of the aliexpress product descriptions provide no useful info or refer to multiple SKUs but only list one SKU to add to cart and it isn't always clear which one it is. For that reason I am willing to pay more with free shipping to Amazon. Someday I'll find the right vendor in China since I expect to need many dozens more but for now KeeYees two pack is OK but a tad pricey. Sorry, I can't rate this product higher because it doesn't fit any of my boards without unnatural acts. Look at the pic above carefully, One side is firmly pinned to the terminal but the other side falls between the two terminal blocks. The board underneath that you can't see the pins exactly matches the two innermost terminal blocks. I'm not going to return because I forced them to fit, but I've decided not to use them either. That explains my harsh rating. If vendor wants to make this right I will reconsider

Does not fit any of the boards

Using this with ESP32. Makes it much easier to wire the ESP32 restricted to 68 year old arthritic hands. Good value.

Perfect fit for my HiLetgo ESP-WROOM-32 ESP32 Development Boards. Good quality. Pins are well marked for this board. Screw down terminals keep wires in place. Life is good....

They are just what I was looking for. Make it easy to setup esp32’s and use.

I own several ESP32 Wroom 32&32u and Versions without mounting holes. None of them fit this breakout board. The headers are too narrow by about 3mm. See my included picture. Using a ruler, the ESP32-Wroom header pins are 25mm apart and and the breakout board is only about 22 mm apart. If the vendor doesn't want a bunch of returns, they should at least show a diagram with the header footprint dimensions.

The boards look well built, but a few are warped. It doesn't prevent them from working, but they are aesthetically unpleasing.