HiLetgo 1PC ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module Works Great for Arduino IDE/Micropython (Small)

Worked exactly as expected and arrived on time. Used to make a wireless automated dog house heater.

Simple setup, no issues uploading from the Arduino IDE (OTA works too). I have one of these connected to an AM2302, sending the sensor data to ThingSpeak IoT service (free), and getting the API data on widgets and alerts on my phone. (Greenhouse Environment Monitoring) Note: you will have to pay attention to board pinout diagrams, as the identifiers on the PCB are not the same as what is needed for GPIO. Also, there arent many GPIO pins and most of them have multiple uses and I think theres only (1) analog pin. Overall, this was a surprisingly good purchase (Ive had issues with other wifi enabled boards) and plan on ordering a few additional dev boards for a more complex network of sensors and controls.

Simply amazing. I dont know if I would get rid of my actual Arduino but this works very well in conjunction with the Arduino or completely on its own. I have two ESP8266 wifi chips still sitting in their packages because this is just so much more convenient, documented, and simple to use. Huge advantage to be breadboard friendly and have pinouts all over the web. Only downside is that the pins corresponding GPIO numbers are a bit sporadic. Overall great product.

Loved the product but it did break after a week of use. Used it as intended and proper voltage but the thing just died. Customer service is currently in the process of sending me a replacement.

Works as advertised. Cool development platform.

I was able to use these for my 5V and 12V McLighting LED projects! They are surprisingly robust and have a pretty decent WIFI range!

IoT Greatness! This was a great addition to my home automation and security and has worked without fail running 24X7. It is connected to a reed sensor on the front door to our house. I receive a text message from it via WiFi whenever the door is opened or closed. (With the help of an IFTTT recipe of course) That said, I now know whenever our youngster leaves for school and comes home.

$9 for a dead NodeMCU. I thought buying them off here on Amazon would be more reliable than eBay/Aliexpress.

Amazing to have Wifi and Arduino on the same board for so cheap. Pay attention to the sellers instructions to get the board set up, use a short DATA USB micro-b cable - some will just charge which will be useless. If all you have is a long USB cable you can coil it up like I did in the picture and have success flashing while it will fail uncoiled. Its the twists in CAT5 (twisted pair) and other data cables that make the data transmission reliable. This thing should have 6 stars. The more I mess with it, the more I like it. Made a WiFi deauth tool with no additional hardware which could be a lot of fun at Starbucks. Also, the pin numbers painted on the board ARE NOT the actual pin numbers. You have to do this: #define D0 16 #define D1 5 // I2C Bus SCL (clock) #define D2 4 // I2C Bus SDA (data) #define D3 0 #define D4 2 // Same as LED_BUILTIN, but inverted logic #define D5 14 // SPI Bus SCK (clock) #define D6 12 // SPI Bus MISO #define D7 13 // SPI Bus MOSI #define D8 15 // SPI Bus SS (CS) #define D9 3 // RX0 (Serial console) #define D10 1 // TX0 (Serial console)

I have probably Nine of these working in the house.... Just got my first one dead on arrival.... I am wondering if they are made as good as the first ones I got