HiLetgo 2pcs ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module (Pack of 2PCS)

First, I ordered a 2 pack and only one will flash, the other gets stuck on Begin to find ESP8266. The LED lights up and computer finds it fine, but it will not flash after multiple attempts. It is not user error as I am using same settings/file as the other one that worked fine. The one that functioned flashed easily and works as I would expect. It came packaged well in a anti-static bag with foam around the pins. Will update if I manage to get the other one working.

One-star but should get ZERO Background: I bought these a while ago and got around to working on several projects over the holidays. To my dismay, I found that these ESP8266 Amica modules simply do not work. I am a hobbyist, Arduino, RaspPi, Linux, and electronics tinkerer and have been for over 10 years or so. These are singly the most frustrating pieces I have ever had the misfortune of wasting my time figuring out. Let me elaborate on these modules: First, the CP2102 fails to negotiate with Linux, MacOS or Windows. I get the following error almost routinely after a sketch fails to upload: cp210x ttyUSB0: failed set request 0x7 status: -110 Second, the pinout for the module is wrong. Many who contributed their views to this board have commented as such so I wont elaborate. Third, the stability of this piece - the one that I could get to upload a sketch - simply was insufficient to warrant even paying one US cent. The module crashed, rebooted, and did not allow serial connections to monitor the processes. In sum, I think this was not as much as a waste of money but it was a HUGE waste of time. I cannot get back the time but I can spend my money elsewhere. HiLetgo will no longer be an Amazon supplier I will purchase from in the future. I suggest looking elsewhere for any and all products if you value your time. Hope this review was helpful. Addendum: If you are wondering whether I followed the myriad of tips, suggestions, HOWTOs and such online, the answer is an emphatic yes. I scoured the internet to find every insight I could for this cheap piece of silicone (offensive language not my style). After exhausting every idea, I simply gave up. You ought to steer clear unless you want to learn everything you can about UART, USB, and Arduino IDE/Python esptool error codes. The bottom line is that these modules are time wasters. Save yourself the time and energy and look for something more dependable.

These cheap little chips are awesome! Took a little bit to get them working, but once I did, I was able to connect them to a linear servo and control the air ducting in our house from any device. Ive worked with other web based arduino chips before but these are really cheap and work great!

This is NodeMCU version 1.0 which fits well on a breadboard. This comes with WiFi. The one that I got has an Arduino WifiScan sketch loaded in it. It comes with no documentation, so it takes a little time to search for information and get it up and running. Once you set up your PC and development environment, it is pretty easy to get it going. Good value. You can get it a bit cheaper, but this one has support folks who are willing to help if you have any question. Will definitely buy from HiLetgo again.

Very easy to setup and run Wled. Allows you to control all functions on leds. Works great, no complaints here!

Whats not to like? Good (though not complete) compatibility with Arduino IDE and most libraries, and wireless communication built in. Ive really enjoyed messing with these, and Im surprised that the 3.3 volt limitation... really hasnt been a limitation. Plenty of displays and sensors use that now. Some of the best bang for the buck in development boards out there!

These worked very well. My only complaint is that the boards didnt come with any documentation, but the ESP8266 is used by enough people that there was plenty of information about how it can be used online.

Items are well packaged and arrived without damage. No problems in using them with the Ardunio IDE. My only wish was that the NodeMCU devices were available without headers. While the headers are very helpful for prototyping, it would be nice for finished projects to be able to save space by attaching wires directly to the module.

One board works perfectly. Had the other board break but hiletgo was quick to help replace the one that broke. Overall very pleased with the board

This item works very well for the IoT. Im having no problems using the Arduino IDE to program it. The only negative is that it only has one analog input, but I knew that before buying.