🚀 Elevate your IoT game with the ultimate Wi-Fi dev duo!
The HiLetgo 2pcs ESP8266 NodeMCU CP2102 ESP-12E Development Boards feature an 80MHz Espressif CPU, 1MB flash memory, and 802.11b Wi-Fi connectivity. Designed for seamless programming via built-in Micro-USB ports and compatible with Arduino IDE, Mongoose IoT, and MicroPython, these boards offer a powerful, flexible platform for rapid IoT prototyping and development.
Processor | 8E+1 |
RAM | DDR |
Memory Speed | 80 MHz |
Wireless Type | 802.11b |
Brand | HiLetgo |
Series | ESP-12E |
Item model number | 3-01-0268 |
Operating System | Arduino IDE, Mongoose IoT, Micropython |
Item Weight | 1.44 ounces |
Product Dimensions | 5 x 3.74 x 0.51 inches |
Item Dimensions LxWxH | 5 x 3.74 x 0.51 inches |
Color | Pack of 2PCS |
Processor Brand | Espressif |
Number of Processors | 1 |
Voltage | 5 Volts |
Manufacturer | HiLetgo |
ASIN | B010N1SPRK |
Is Discontinued By Manufacturer | No |
Date First Available | June 25, 2015 |
F**.
I'm using the NodeMCU as a web server and it works great. It was a struggle to find example code ...
Complete project description follows. I'm using the NodeMCU as a web server and it works great. It was a struggle to find example code that actually connects outside my local area network but I found some. Also had to learn the rudiments of HTML. Only issue is it seems to need to be restarted every 4 or 5 days. Since I'm going to leave it in a remote location I'll put some code in the MEGA that sits right next to it to restart the NodeMCU every couple days, by pulling the RST pin low.Green Pond Bridge Boat ClearanceAt ‘very low tide’ the clearance under Green Pond Bridge in Cape Cod is 6’6” or less and that is too low for the boat I use. The tide charts for Falmouth, MA are theoretical and can vary as much as 18” from what is actually happening at the bridge. This system monitors the clearance and transmits the information on the internet.All of these parts were purchased from Amazon.TransmitterAn (Arduino) Elegoo UNO R3 board is connected to an Elegoo HC-SR04 Ultrasonic Distance Sensor. The UNO and the sensor calculate the distance from a fixed dock to the sea level, then transmit that data using a MakerFocus NRF24L01 Wireless Transceiver to the Receiver described below. The Transmitter sits on the end of a dock where there is no power, so the UNO, Transceiver and Distance Sensor are powered by the energyShield 2. This battery has special capabilities – it wakes everything up every 15 minutes. The system takes a couple readings of the distance to the water then transmits that data, then the battery shuts it all off. The data transmitted includes information from the battery – time, date, and voltage.I have been testing this unit at home (in Dallas) and it has been operating outside, for about 20 days. Based on battery drain it looks like it will operate for about 4-5 months before it needs a recharge. When the temperature drops below zero the system still works fine but the voltage reported in the battery seems low.All of this is housed in a plastic box printed for the purpose with a FlashForge 3d Printer Creator Pro, using eSun White ABS+ filamentPicture below.ReceiverAn (Arduino) Elegoo MEGA 2560 R3 is connected to another NRF24 Transceiver to receive the data. The MEGA does the math to convert the distance from the dock to the water, to the bridge clearance. Then the information is displayed on an Elegoo UNO R3 Touch Screen (that also works fine on the Mega).Picture below. A small plastic frame for the Receiver was also printed on the 3d printerWeb ServerFinally, the information in the MEGA is transmitted over a serial bus to a Hiletgo ESP8266 NodeMCU ESP-12E Internet WIFI Development Board (Also operates using Arduino IDE programming). This board is connected to the MEGA via the XCSOURCE Logic Level Converter and powered by a UCEC MB102 Breadboard Power Supply Module. All mounted on an Elegoo Breadboard. The ESP8266 is programmed to be a web server. It connects to the internet through the modem/router provided by AT&T.Picture of my cell phone below.
J**
Easy to Use Afterwards
#1. They came packaged extremely well and obviously sealed correctly with no bent pins, dings or scratches. This set the pretenses of my expectations although still skeptical.#2. The boards themselves were solid all the way around. No wiggling pieces from bad soldiering ect.#3 I mentally prepared for a difficult time in flashing any type of program onto them as I haven't delt with microcontrollers in this magnitude. I over read as I waited because again, to my surprise, it was simple.#4 The route I chose was to utilize Arduino IDE and github for the first one.#5 A plethora of information is online as well as several hundred page user guide I downloaded from the link that came in the box(another easy venture to do).#5 I chose Arduino IDE as I have an UNO R3 and had some experience with that. I also installed MicroPython and CircuitPython and because I use Virtual Studio Code for Python programming. It works awesome on that platform as well .#6 You don't need either if you're running Linux(I used my Ubuntu, haven't toyed with kali yet or a VM) as everything can be done from the command line if you prefer.#7 AND FINALLY I WILL be purchasing these again!
J**A
I really really like these.
I've used quite a few different microcontrollers over the last few years for various projects - mostly home automation, but some professional R&D as well. I first picked up a pair of these when I wanted to easily wire power into a microcontroller via USB without dealing with +/-5 wires dangling to a controller. USB power adapter into wall, usb cable to microcontroller, done. Nice and clean and didn't need to tie up my power supply.Next, while I've used Tasmota on and off via flashing microcontrollers and dealing with connecting UARTs to pc boards, I can plug the NodeMCU into my computer, fire up tasmotizer, and have these things flashed and configured in a minute or two. Power it back up, it connects to wifi and then my message queue and is ready to take commands.I get what I said is a bunch of greek - there's still a learning curve, but at least for me the NodeMCU is a really handy "puzzle piece" for when I'm trying to work on end functionality, not on the microcontroller itself. Add in a 3v3 relay module or some sensors and you can quickly get up and running with this. Highly recommended.
T**M
Fun and useful
Item as described, well packed.This brand does well, in my experience.
M**E
Some oddities but a great way to make an IoT device
There are some really weird quirks with this board.The first is the most obvious in that it's a 3.3v device only. Meaning you'll need to use an external power source for any 5v modules you'd like to use with it.Next up is loading sketches. While it does work with the Arduino IDE software that other board use it takes a bit of massaging to get things up and running. Even more so if you want to use the serial monitor to view messages from the device.Finally the printed labels on the board don't match what the pin actually is. If you connected to the pin labeled 'D0' on the board and wanted to read an input you wouldn't read 0, you'd read 16.Want to read 'D1"? That's actually pin 5.D2? That's 4.D3? Nope it's not 3. It's 0.That caused me more aggravation then anything else with this board. Make sure to lookup a pinout graphic if your working with this board and keep it handy.All that aside it works well, connecting to my wifi was a piece of cake with the included library and I was able to control my Philips Hue lights using this board and a library from Github.Not a bad board for IoT development, but far more frustrating than it needs to be.
Trustpilot
3 weeks ago
1 day ago