HiLetgo3pcs ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module Works Great for Arduino IDE/Micropython (Large)

I recently purchased the HiLetgo 3pcs ESP8266 NodeMCU CP2102 ESP-12E Development Boards for a custom LED project I had in mind. After spending some quality time with these boards, I'm thoroughly impressed and feel compelled to share my experience.First off, the ease of use is remarkable. As someone who appreciates the nuances of DIY electronics but isn't a seasoned expert, I found the setup process to be straightforward and user-friendly. The boards were compatible with my existing software setup, and I didn't encounter any significant hurdles during the initial programming phase.The real magic happened when I started using these boards for my custom LED setups. The ESP8266 NodeMCU's ability to effortlessly drive and control LEDs was a game-changer. Whether it was for basic lighting projects or more complex, multi-colored LED arrays, these boards performed flawlessly. The Wi-Fi capability is also a huge plus, offering the convenience of wireless control, which is perfect for smart home applications.I must also commend the stability and reliability of these boards. Throughout my projects, they maintained consistent performance without any significant glitches or overheating issues. This reliability is crucial when you're knee-deep in a project and need your components to perform without a hitch.In terms of value for money, this pack of three is an absolute steal. The quality and functionality you get for the price are unmatched, making these boards a must-have for anyone into DIY electronics, especially LED projects.To sum up, the HiLetgo ESP8266 NodeMCU Development Boards are a fantastic investment for anyone looking to delve into custom LED projects or general IoT applications. Their ease of use, reliability, and excellent value make them a standout choice. I highly recommend these to both novices and seasoned tinkerers alike!

I recently used this module in a project to control LED lights, and I have to say, it worked incredibly well.One of the best things about the ESP8266 is its low price point. Despite being packed with features, including a built-in WiFi chip and support for the Arduino IDE, the module is incredibly affordable, making it a great choice for hobbyists and professionals on a budget.In my LED project, I used the ESP8266 to control the lights via a web interface. The module responded quickly and reliably to all of my commands, and I was able to create a simple web page that allowed me to turn the lights on and off, and adjust their brightness.Another great thing about the ESP8266 is its compact size. The module is small enough to fit in just about any project, making it incredibly versatile. Despite its small size and low price, the module is also quite powerful, with plenty of processing power and memory to handle a wide range of tasks.

I made a WiFi filament detector sensor with this HiLetgo ESP8266. I followed instructions from a YouTube video and made a few adjustments to the sketch to make a filament detector sensor for my modified Creality CR10 3D printer. I am using an Intel NUC and Ubuntu. This HiLetgo ESP8266 board is connected to a microswitch that the filament rides on. When the filament runs out the switch opens and sends a signal to pause my 3D printer until I reinstall new filament.It works great, I did have issues with programming it through the Arduino IDE but that is because I am an amateur programming Arduino.

Great board and are very economical. I purchased 9 of these boards for a freezer monitoring project at the local food bank. I have them all reporting to the IOT Cloud and they are working great. No major complaints, although I would like to have them OTA compatible.

These are great little micro controllers. I used to play with the basic stamps but these are leagues more powerful. The Wifi capability is what I like best. I use one of these to monitor the temperature of my freezer and it will email me if the temp gets too high which means one of the kids left the door open!I have a 2nd one that monitors temperature and humidity of my dehydrator. I use it to dry 3D printer filament. It will also email me when the filament is done drying.

Once the drivers were installed - ran into a couple of glitches but essentially my second attempt at loading the drivers worked. Once past that - the rest was a breeze. I was able to build several prototypes to test out the functionality.Board is well made - can't see issues with the soldering or pins. HiLetGo is becoming my go to seller for Arduino related products. Most of the technical details are already listed in other reviews.One thing I found out (was unaware) - if you power the board via USB then the Vin pin provides 5V output for other sensors. Can't provide high current in my testing it easily tolerated a few milliamps.I used three boards to build #1. Web Server with sensors sending data to remote #2. Web Client with OLED SSD1315 display and #3. Energy Meter using an INA219 module reporting current and voltage.To use the SDA & SCL pins for serial communication for LCD or OLED displays for example, you need the following in your sketches:#include <Wire.h>#define I2C_SDA 4 /// ESP8266 NodeMCU SDA pin GPIO4 = D2#define I2C_SCL 5 /// ESP8266 NodeMCU SCL pin GPIO5 = D1// add in your setup sectionWire.begin(I2C_SDA, I2C_SCL); /// Identify SDA & SLC pins for ESP8266 NodeMCUSome additional information for pin mapping from my notes. Hope it's helpful for others.D0 = GPIO16; Wake [connect RST to D0]D1 = GPIO5; SCL Serial Clock -D2 = GPIO4; SDA Serial Data - #include Wire.h & Wire.begin(SDA, SCL);D3 = GPIO0; Using 0 or D3 both acceptedD4 = GPIO2; using 2 or D4 both acceptedD5 = GPIO14;D6 = GPIO12;D7 = GPIO13;D8 = GPIO15;D9 = GPIO3;D10 = GPIO1;LED_BUILTIN = GPIO16 (auxiliary constant for the board LED, not a board pin);