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

Best Buy for the money. No problems and works perfect.

Board received is completely different from standard NodeMcu boards. I was unable to find specs nor the proper pinout for this board. Supposed manufacturer HiLetgo, doesn't list any similar boards on their website.

This chip is ESP8266 NOT ESP32

It’s good 👍🔥

I ordered six of these boards yesterday. They arrived quickly, but two out of six were not working (one not flashable at all, one not able to connect to WiFi). Lots of the soldering is shoddy and connections between components weak or non-existing.

July 25th Review Update ============ I ordered 6 more pieces last night, and I got all of them following day. I installed Micropython on all of them and activated WebRepl, and I have no issues so far. All of them worked! I'm attaching new screenshots (the one with a fleet of NodeMcu's). Included in this screenshots are some of the projects I have done with this board: 1. Thermal camera sensor 2. Motion detector 3. Robot car 4. Laser tripwire system with RFID-based card access 5. Stepper motor with DRV8825 driver integration 6. Micro servo with OLED screen / Hall Sensor switch All of these are programmed with Micropython. I have also attached screenshots of my frontend and backend Raspberry-based data collector and analytics program (my own platform). The point of these screenshots is to show what's possible with this board. So far out of my 19 NodeMcu boards, 17 are perfect. The other two were failure because one of them was never delivered and the other one won't allow any firmware installation. Amazon has refunded those two by the way. July 10th Review Update ============ So I ordered two more. However one of them was missing. Amazon only delivered one! The other one isn't accepting firmware updates. I wasted a week of waiting for the delivery and talking to support. The good thing is Amazon refunded both, and HiLetGo email tech support is able to provide "moral" support. At least they are responsive. So at the end the delivery part was Amazon's fault because what HiLetGo does is they delivery the items to Amazon and Amazon is the one who fulfills the order. Now the other board that's malfunctioning seems to HiLetGo's fault. I am at odds whether I should reduce my rating from 5 stars to 4 or 3 stars. I looked for alternatives but I can't find any reliable sellers with reliable reviews. So I still went with HiLetGo. I ordered an extra 5 boards again. And they all worked fine. It took 2 mins to flash the firmware. So 10 good boards versus 1 missing and 1 malfunctioning (which both got refunded) I think should offset the bad experience I had. Comment below if you agree or not. As part of my research why this other board isn't flashing correctly because of "espcomm_sync failed" errors, it seems it's a hardware misconfiguration. There were suggested workarounds but they didn't work for me. Google "nodemcu espcomm_sync failed" for solutions since I am not allowed to post a URL here. Also Google "Comparison of ESP8266 NodeMCU development boards" to get more information on various NodeMcu boards. I say get the Amica-based NodeMcu board. It's the easiest and most reliable. The good thing is HiLetGo carries the Amica-based NodeMcu. So far the projects I have made with this board are: * Robot car * Magnetic reed switches for door and mailbox * Joystick controllers * Rfid controller * Weight sensors * Neopixel controllers I still prefer this board over the Adafruit Huzzah and Wemos. Recently I've dabbled with Ultrasonic Sensors and Relay. This board also worked flawlessly but the Olimex board seems better but pricier because it has integrated relay. I guess that's not really better because you can buy an extra relay and put it with the NodeMcu. Jun 29th 2017 Review Update ============ So I ordered two of these again since they are the most reliable ESP8266 dev board out there (for the cheapest price). Oh I've tried them all (Huzzah, Olimex, Wemos etc). If you think I haven't, send me a message and I will order it. Today I had a hiccup with uploading Micropython. It won't flash. The same commands that worked on my previous two NodeMcus worked flawlessly from these same vendor. But now it won't. I figured I have to use special flash mode when using esptool. Now it's working again. So for those who are using Micropython and flashing the firmware with esptool, here's the commands that I'd suggest you try 1. Erase first. This assumes you update the PORT accordingly esptool.py --port /dev/tty.SLAB_USBtoUART erase_flash 2. Upload the firmware. This assumes you went to Micropython and downloaded the firmware! The "-fm dio" is CRITICAL for these latest two dev boards I ordered. Previously I didn't need those. I read from the docs, most NodeMcu boards use this mode. So I guess I got lucky on my first two. esptool.py --port /dev/tty.SLAB_USBtoUART --baud 115200 write_flash -fm dio 0x00000 esp8266-20170526-v1.9.bin 3. Reset and connect to your terminal to verify. Bonus content: Upload a NodeMcu LUA-based firmware: =============================== esptool.py --port /dev/tty.SLAB_USBtoUART write_flash -fm dio 0x00000 nodemcu-master-21-modules-2017-06-09-04-48-50-float.bin Note: This assumes you went to NodeMcu and downloaded their firmware. And you browse to the directory where you have this firmware. Upload a NonOS firmware from Espressif: =============================== esptool.py --port /dev/tty.SLAB_USBtoUART --baud 115200 write_flash --flash_mode dio --flash_size detect 0x00000 boot_v1.7.bin 0x01000 at/512+512/user1.1024.new.2.bin 0x3fc000 esp_init_data_default.bin 0x7e000 blank.bin 0x3fe000 blank.bin Note: This assumes you downloaded the ESP8266_NONOS_SDK-2.1.0 sdk from Espressif's website. After downloading browse to ESP8266_NONOS_SDK-2.1.0/bin directory. Screenshots from my projects ======================= I've done a couple but I think these two robots I've made are notable and shows you can control these with NodeMcu. The joystick is controlled by a mini NodeMcu (same code I used for the standard NodeMcu). Whoemever is saying this dev board is fake doesn't know a thing. Original Review ============ I ordered two of this, so I can play around with Micropython firmware (Python-based language) and the Nodemcu firmware (LUA-based language). Pros: * Solid build like a rock (compare to other ESP8266 boards) * It has everything you need. No need for a separate FTDI cable or breakout board * No need to pull down GPIOs to do a firmware flash update. It's all automatic. Firmware update with Micropython is pure magic. * No need to solder pins since they are presoldered. Of course you might need to solder the unit itself with your projects but that's a different discussion. * 4MB memory. That's 32Mbit * Price is reasonable compare to Ebay Cons * None. It just works. That's why I ordered a second one.

Great, product using it for a rc car, wifi and pins work great, a suggestion for the seller please sell a cable with it too as it will save a lot of time of the customers, the size is very small so it fits in a bread board easily , help for the other costumers and people wanting to buy, buy it with a good quality cable , and it has to be a data cable or the code form your programming device will not transfer

Der NodeMCU basiert auf einem ESP8266 controller mit integriertem Wifi. Die Komponenten sind so günstig, das sich damit perfekt Projekt Rund um das Thema Internet of Thing (IoT) realisieren lassen, ohne gleich den Geldbeutel zu sprengen. Ich nutze ihn aktuell zusammen mit einem Temperatur- und Luftfeuchtigkeit-Sensor zum loggen der Daten in Richtung [.....] Mit dem gesammelt Daten steuere ich im Anschluss die Thermostate in meiner Wohnung. Die Version auf Amazon habe ich damals bestellt, da sie sofort lieferbar war. Beim Chinesen des Vertrauens bekommt man die gleichen Mikrocontroller für ca. 6€, aber mit Lieferzeit von 2-3 Wochen.

The HiLetgo ESP8266 NodeMCU is a fantastic board for anyone diving into IoT projects. Its compact design packs a punch with built-in Wi-Fi capabilities, making it super easy to connect to networks. The CP2102 chip ensures reliable USB communication, which simplifies programming and debugging. I am using this microcontroller for a DIY WLED project, and it is working as expected. What sets this highly sturdy board apart is its user-friendly nature. Whether you're a beginner or an experienced maker, the NodeMCU's compatibility with the Arduino IDE makes coding a breeze. Plus, the extensive online documentation and community support mean you're never alone when tackling a new project. It's an affordable and versatile option for home automation, sensor networks, and more.