Wifi thermometer - NodeMCU in AP mode

-
Wifi Thermometer is a project where NodeMCU is used in AP mode, it's actually a hotspot to which you connect, and then you can view the temperatures or the magnitudes of other sensors that you connect to the NodeMCU. Values are viewed through a web browser on the page that NodeMCU generates. It is located on the same IP / DNS flag as the gateway (NodeMCU). This solution demonstrates two DS18B20 sensors using OneWire protocol.
parameters:

  • NodeMCU in Access Point (AP)
  • Custom SSID and WPA2 PSK encryption
  • Custom IP (static) / DNS flag
  • Secure web site accessible from home network
  • Always when loading the page, the current info (informative character)
  • Graphic depiction

Obrázek
The data is updated whenever the client refresh the page. This means that it always has the current temperature.
Support me and find interesting solutions at: https://arduino.php5.sk

Source code:
#include <OneWire.h> //KNIZNICA ONEWIRE PRE VYUZITIE ONEWIRE ZBERNICE #include <DallasTemperature.h> //KNIZNICA PRE TEPLOTNE CIDLA #define ONE_WIRE_BUS 2 //DEFINICIA PINU AKO ZBERNICE PRE ONEWIRE ZARIADENIA OneWire oneWire(ONE_WIRE_BUS); //ONEWIRE ČÍTAŤ IBA NA PORTE DEFINOVANOM VYSSIE DallasTemperature sensors(&oneWire); #include <ESP8266WiFi.h> #include <WiFiClient.h> #include <ESP8266WebServer.h> #include <SPI.h> const char *ssid = "ESPap"; const char *password = "thereisnospoon"; ESP8266WebServer server(80); /* IP stranky je 192.168.4.1 (predpísané kniznicou) */ void handleRoot() { sensors.begin(); sensors.requestTemperatures(); server.send(200, "text/html", "<!DOCTYPE html><html><body><table><tr><td>Cidlo</td><td>Hodnota</td></tr><tr><td>DS18b20 - dnu</td><td>"+(String)sensors.getTempCByIndex(0)+"</td></tr><tr><td>DS18b20 - von</td><td>"+(String)sensors.getTempCByIndex(1)+"</td></tr></table></body></html>"); } void setup() { delay(1000); Serial.begin(115200); Serial.println(); Serial.print("Konfigurujem access point..."); /* You can remove the password parameter if you want the AP to be open. */ WiFi.softAP(ssid, password); IPAddress myIP = WiFi.softAPIP(); Serial.print("IP adresa pristupoveho bodu je: "); Serial.println(myIP); server.on("/", handleRoot); server.begin(); Serial.println("Webserver bezi"); } void loop() { server.handleClient(); }

Comments

Post a Comment

Popular posts from this blog

Web scraper via Arduino & NodeMCU & ESP32

-
Image
Today, we will devote our microcontroller and its general use to a rather unusual purpose. Specifically, I will be talking about how I made a microcontroller from a webscraper. (If this can be called when processing your own backend information). As many of you know, a web scraper is a device that performs the task of retrieving information from that web site. The most wanted information from websites is e-mail addresses, phone numbers. Recently, however, this phenomenon is also used for a variety of statistical tasks where the scraper receives data on products, their prices, and evaluates them. Even similar devices are used as robots for trading with cryptomas or common names. At the most appropriate time (statistically) the robot pedal and bought another - a suitable menu with a rising tendency. In my case, I was interested in getting information from websites, specifically phone numbers and email addresses. We will therefore go directly to the realization. I have used 3 kinds
Read more

ESP32 control via UDP datagrams

-
Image
Today I would like to point out the possibility of controlling the ESP32 development board by sending UDP messages for easy ON / OFF control. This is one of the easiest ways to send data, process it, and take action based on the information received. ESP32 is a platform that is used in most cases in connection with WiFi connectivity as a webserver or webclient, which connects to a remote server and POST, GET method, or with the integration of the MQTT protocol, sends data to a remote server / guest. Libraries for ESP32 written in C++ Arduino core (framework) also allows to use asynchronous UDP libraries for sending and receiving data. An interesting feature is asynchronicity, as they work in the "background" and the user does not have to program complex functions to accept connections, process information, etc. To send data to the ESP32 development board, we need a simple UDP client. In my case, I used the Windows version of the relatively well-known Packet Sender client. It
Read more

Biking on Google Maps - Arduino Leonardo (32u4) - HID device

-
Image
Cycling is a very popular sport, also thanks to the successful athlete Petr Sagan. Passionate cyclists roam our roads and paths. However, as the weather is not always good, not only a fan of bicycles would like to ride from the comfort of home. So today I am bringing a way to do this, say, the augmented reality of Google maps. At the beginning we will go through the necessary hardware resources for the project and in the next step we will discuss their functionality. Hardware Components: Arduino (32u4 CPU) Leonardo  Magnetic reel switch  2x pushbuttons  To use the system, the user must turn on Google Maps, select any site in the world and switch to Street View mode. This ensures a ready interface for interacting with the bike (Arduin). Any type of bicycle can be used. Classic, road, mountain, treadmill. A magnetic contact must be fitted on the pedal and the structure. The main element of the system is the use of the Arduino Leonardo development board, which contains an AT
Read more