3Pcs ESP8266 ESP-12E CP2102 NodeMCU Lua Wireless Module Development Board for Arduino IDE/Micropython

Batteries are as stated. The price was very reasonable

exactly as described, well packaged, arrived quickly, used at a hackathon

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 tointegrate 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.

Seemed initially to work and be the same as the others I have gotten from various sources. I got two units and I successfully flashed one with Tasmota and one with AI_On-The_Edge firmware. So far, I have only worked a while with the Tasmota unit and it seems to work like my other units

I'm working on a project, and I required a camera for the project, and this ESP-32 CAM solution worked great. I have purchased other ones in the past, and this was my first with this vendor. I ordered 3 sets (6 total ESP32's), and I went through 4 of these units, and NONE of them would take a firmware upload. I reached out the vendor and asked for advice. In the few hours it took to get their reply, I kept at it, and discovered that these ESP32's will ONLY take a firmware upload, IF you use the 5V pin and the GND pin directly below it along with the TX and RX pins to function. IF you use the GND pin under the TX/RX pins, they will NOT. Since this is not mentioned anywhere on the product description, or reviews, I figured I let the vendor (Hosyond) know this and to share that with their product description. Hopefully, this will help someone else who is going through the same headaches. Also, don't forget to short the GPIO-0 and GND pins to put the ESP-32 CAM into "receiving" mode, so that you can upload your firmware, etc. Cheers-

I needed the micro controller for one of my design class projects, works completely as intended with the help of youtube tutorials depending on what you want to use it for.

*** 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.

Only one of the 5 would even put out to the serial monitor, and none of them could give pwm outputs. Just static, and not even consistent.. the pins they come with don't even make connection.. these are junk