An open-source firmware and development kit that helps you to prototype your IOT product within a few Lua script lines. Open-source, Interactive, Programmable, Low cost, Simple, Smart, WI-FI enabled. Arduino-like hardware IO. Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware. NodeMCU is an open-source firmware and development kit that helps electronics enthusiasts to prototype IoT products within a few Lua script lines. Concretely, it is a firmware you can flash to any ESP8266 board, which will then interpret a text file which contains your commands Getting Started aka NodeMCU Quick Start¶ The basic process to get started with NodeMCU consists of the following three steps. Build the firmware with the modules you need; Flash the firmware to the chip; Upload code to the device. You will typically do steps 1 and 2 only once, but then repeat step 3 as you develop your application Real time clock using NodeMCU, DS3231 and SSD1306 OLED This NodeMCU project shows how to build a real time clock with this development board, DS3231 RTC chip and SSD1306 OLED display (128×64 Pixel). The DS3231 RTC has a built-in temperature sensor, we could use this sensor to detect and read the temperature of the chip, the SSD1306 screen will. In this tutorial we will see how to turn on and off LED over the internet using MQTT protocol using NodeMCU ESP8266? You can get much more information on ESP8266 Protocols in my latest book NodeMCU Protocols and Communication methods.. Introduction. MQTT is a machine-to-machine (M2M)/Internet of Things connectivity protocol
NodeMCU is an Open Source Firmware Development Board that helps you to build your IOT(Internet of Things) projects with a few LUA Script Lines, NodeMCU it is like Arduino Hardware with a Input Output built in the Board itself, it has also a Wifi built in to connect directly to internet to control your things online using Nodejs Style network API for digital network applications, which. To get round this you need to delay the start of the function execution. This is done by using a timer that delays for 6 seconds before starting. This gives you time to send the command tmr.stop() so it never gets to the execute the function. you can find a convenient button for this in the command tab in ESPlorer. This post is a step-by-step guide that shows you how to build a standalone ESP8266 NodeMCU Web Server that controls two outputs (two LEDs). This ESP8266 Web Server is mobile responsive and it can be accessed with any device that as a browser in your local network In the new code below there are no numbers - the next timer just gets assigned. Also these seem to be software timers so there are more than 7. Try creating more than 7 timer objects and see.
For example, the D0 pin on the NodeMCU Dev kit is mapped to the internal GPIO pin 16 of ESP8266. Pins. NodeMCU provides access to the GPIO (General Purpose Input/Output) and a pin mapping table is part of the API documentation. I/O index ESP8266 pin 0 [*] GPIO16 1 GPIO5 2 GPIO4 3 GPIO0 4 GPIO2 5 GPIO14 6 GPIO12 7 GPIO13 You can probably see that you could read a button input and change the output data sent to a served page using gpio.read(pin) and taking action on the result. This would be the basis of making a webpage indicate data from the ESP module e.g. from a sensor or a button press etc. - Mon Nov 24, 2014 4:46 pm #3233 IOT example: - sends ADC value to a webserver every 3 seconds (need connection to TOUT pin of ESP, not tested myself Learn how to connect your device with Linux Screen using the built-in Lua interpreter to set up the file system and connect to the network. Then, learn how to automate the scripting process with Luatool and put it all together with a basic TCP server that can interact with a pulse-width modulated LED, a potentiometer, and a switch In the following examples, I will be using the NodeMCU development board and will program it with the Arduino software. Hopefully you have already set-up your ESP8266 development environment and were able to load the blink sketch. If not please follow this tutorial first. The ESP8266 can communicate over WiFi in two different modes
. This pages shows you some nodeMCU examples in the lua scripting language. this language is fairly different to the Arcuino C/C++ but the great advantage it has is that you can update individual code sections without re-flashing the whole lot As the heading suggests, this example demonstrates how to turn the ESP8266 into an access point (AP), and serve up web pages to any connected client. To start with, plug your ESP8266 NodeMCU into your computer and Try the sketch out; and then we will dissect it in some detail. #include <ESP8266WiFi.h> #include <ESP8266WebServer.h> /* Put your. NodeMCU ESP8266 Arduino IDE Code Example. The code to connect to a wireless access point is relatively straightforward: enter the SSID and the password of the network you want to connect to, and call th ESPMetric is a matrix LEDs screen driven by an ESP8266 with Arduino. It can be use for smarthome domain or others. Project Owner Contributor. NTP-enbling a cheap $2 Ikea analog clock using ESP-12/NodeMCU/Arduino. Project Owner Contributor
Hackster is a community dedicated to learning hardware, from beginner to pro. Share your projects and learn from other developers. Come build awesome hardware! Explore 617 NodeMCU projects and tutorials with instructions, code and schematics. New projects for beginners and up posted every day. Get inspired with ideas and build your own NodeMCU - MQTT Basic Example: This lesson will show the basic MQTT protocol usage on the NodeMCU board .We use the MQTTBox as the MQTT client here, and we will use the NodeMCU to complete following operations:Publish hello world to the topic outTopic every two seconds.Subs.. The NodeMCU project uses the SPIFFS filesystem to store files in the flash chip. The technical details about how this is configured can be found below, along with various build time options. spiffsimg - Manipulate SPI Flash File System disk images Example: ¶ # spiffsimg -f flash.img -S 32m -U 524288 -i > import myapp/lua/init.lua init.lua.
But in the end you want to realize projects and need examples to see how the SPI communication is done. The first one is a communication between the Arduino Uno as master and an Arduino Mega as slave. In the second example we build up a SPI communication between a NodeMCU as master and an Arduino Uno as slave Next is the function tog that is called when the timer triggers. Then the timer is started. You can use 'mytimer:alarm' instead of register and start, which both registers and starts the timer if you want. The reason why I used D7 pin for this example is , I uploaded the basic blink program that comes with the examples program in the arduino IDE which is connected with 13 pin of arduino. The 13th pin is mapped into D7 pin of NodeMCU. go to board and select the type of esp8266 you are using. and select the correct COM port to run the program on. WIFI Scanner Example GPIO & PWM & Servo Example. I2C READING DS1321 REAL TIME CLOCK. DS18B20 Wifi Thermostat Hello World Example CSS Example Graphics Example. Graphic Clock Example Analog Input Graph MSG URL Usage MSG URL (Advanced) More examples from esp8266-projects.com
Need to flash nodemcu firmware and your code bin firmware now together into target device; calculate your nodemcu firmware size for the code bin firmware address first, for example: use the nodemcu firmware, size on disk as below: so the bits size is: 408KB + 4KB =412 KB, 412 KB*1024 = 421888, change from dec to hex by using calculator you. local ssid, rssi, authmode, channel = string.match(v, "([^,]+),([^,]+),([^,]+),([^,]*)")