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

These things are crazy value, flashed and controlling my heat pumps via WiFi for less than the price of a Starbucks

In my first project, I installed ESPHome on one and connected 3 temperature sensors for my sauna. It handles this great, and I'm still using it. In my second project, I tried installing WLED to control 2 different led strips. It started out working fine, but eventually started acting strange, and became unresponsive. I determined WLED was too much for it to handle, and so I had to switch to an ESP32. But I have no complaints, because the D1 Mini is cheap, uses very low power, and takes up very little space. Highly recommend for lightweight projects!

These d1 minis have been great connected to dht22s to monitor temperature and humidity in my basement and on my front porch . The connectivity has been great, with only a few drops from the one on my porch farthest from the router and it connects back quickly. I use Home Assistant to aggregate the data from the sensors. Great devices for my use case

Work as intended, nice product and high quality feeling. Have only used one of the two. It tends to heat up a lot under wifi and video transmitting but overall handles the job. The only problem was that one ground pin was not working and could not be used.

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.

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.

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.

For the ESP8266 D1 mini clones. Packaging and delivery good. Inferior memory chip and/or flash wiring. Issue documented somewhat on /esp8266/Arduino/issues/6007. The module does not wake from deep sleep. Requires double reset to wake; zombie mode, hangs, etc. All five units have the same flash chip ID- 162085, and all five have the same problem. I have no issues with scores of similar modules on same test set up. Was able to resolve no-wake issue by adding 15K pull up resistor from 3.3V to MISO on chip. Tested on three modules for over 48 hrs. Sent vendor issue- no response. Probably not a highly encountered issue using D1 minis and deep sleep. They seemed to work fine otherwise.

Good product

These things are always good. Works like a dream!