2Pack ESP-WROOM-32 ESP32 Development Board WiFi Bluetooth CP2102 Dual Core 2.4GHz Microcontroller Compatible with Arduino IDE, NodeMCU

If you think about what this product is, and the fact that you're getting them for $3 each, it kinda blows your mind. It's a complete (if minimalist) computer capable of doing quite a lot, complete with wifi. Honestly I don't understand how it's possible to design, build, market, sell, ship, and profit from a $3 computer, but they work exactly as advertised. I program them with an Arduino IDE, which was quite easy to get going with this board.

Can be used for pretty much anything and works like a charm

These D1 Mini ESP8266 boards are easy to program, easy to solder, and come with the headers included (Not Soldered). They work perfectly with Arduino code, and connecting them to Wi-Fi is simple with the right setup. No battery included, but they power easily via 5V micro-USB. Great quality boards for the price — perfect for DIY and IoT projects! Low footprint size.

These frankly are great setups, but if you don't know what you are doing, the esp32-cam is NOT for you. (You can learn, but it will be frustrating.) YOU WILL NEED A SERIAL CABLE THAT IS 3.3V DATA (Most are, but check, as 5V level will kill it) OR ONE OF THE PROGRAMMER BOARDS FOR IT. I had 1 of 2 fail, and it took a bit to get a replacement. However, That came and the seller was responsive. (Doing a bit of testing, it was the board that was bad, not the camera. So cool a spare camera (which pretty much only works with this.)) They are good chips, if you program them with Tasmota, you can easily adjust the setup for them. They can be setup pretty easy, but the first flash can be a problem the first time you do it, and I did have Tasmota corrupt it's settings, not want to work with the easy gui tools and had to go back and use the esptool.py to flash it clean. (As far as I tell that's Tasmota's issue. Worked fine flashing with the esp32-cam example program in Arduino, then back, if you do use the esptool.py to flash the *factory* bin to clear the settings, the normal precompiled ones leave the settings intact.) Pros: Cheap Responsive Seller Cheap wireless camera that only requires a 5V power source! Extra pins for SD and/or other sensors (presence, temperature, etc. Just about anything that Arduino supports works.) Cons: 1 failed, was replaced Initial setup Even with the failure, There's not much that's in the same price range. It's pretty good, though you trade framerate for quality or vice-versa. (only a few fps at 1600x1200, or 1280x720 (720p) to 60 at lower resolutions) So I'll give it 4 stars.

I recently had the pleasure of working with the D1 Mini NodeMCU ESP-8266 WiFi Module Development Board, and I'm thrilled to share my overwhelmingly positive experience! As a hobbyist and maker, I've always been drawn to innovative technologies that enable me to bring my ideas to life. This little board has exceeded my expectations in every way! *Why I love it:* 1. **Compact size**: The D1 Mini's tiny form factor makes it perfect for small-scale projects or prototypes. 2. **Easy to use**: With a simple Arduino-like programming interface, I was able to get started with minimal fuss. 3. **WiFi capabilities**: The ESP-8266 chip provides reliable and efficient WiFi connectivity, making it easy to integrate IoT features into my projects. Plug it in and it connects without any fuss. 4. **Low power consumption**: This board is designed for energy efficiency, which means it can run for hours on a single battery, usb cable and even be powered by a small solar panel. 5. **Community support**: The NodeMCU community is incredibly active and supportive, with plenty of resources available to help you get started and overcome any challenges. *Real-world applications:* + IoT projects, such as home automation or environmental monitoring + Robotics and automation + Prototyping and testing WiFi-enabled devices + Maker and DIY projects that require wireless connectivity **In conclusion**, I'm thoroughly impressed with the D1 Mini NodeMCU ESP-8266 WiFi Module Development Board. Its compact size, ease of use, WiFi capabilities, low power consumption, and community support make it an excellent choice for anyone looking to bring their IoT or maker project ideas to life.

*** Received replacement *** Upping review to 4.999 stars (I'll round up), the modules work just fine. Thanks! Ordered three, received three. Two of the three flashed without error, third would not flash. Tried several methods, two different PCs, but simply could not write to this card via USB. Asked vendor if I could replace, vendor asked for picture and said, "we'll send a replacement". THEN the vendor said... wait! engineer wants a video. I'm not in the business of making videos for a $4 card, and the response system doesn't accept videos (yes, I tried). So I smashed the module with a hammer, sent a picture, and told them I was done. I'll happily update if they do actually replace the card, but CAVEAT EMPTOR. Update: vendor has now stated they will be sending replacement. I'll update if/ when I receive.

Worked great! I ordered these for a 3D project I printed on my K2 Plus.

These are probably fine for the very very simplest applications, but not for WLED. Look for the 4MB memory version. They are the same price and look the same, so pay attention to the specs (wish I had!)