In this example we learn how to send Secured POST request to a secured https web page using NodeMCU or ESP8266? As we know all web pages are HTTP protocols, GET and POST are methods of communicating between web browser and the server. Also you look towards server side php Example coding. If you are looking for HTTPS GET method read here.
In this tutorial we are interfacing DHT11 or DHT22 Humidity temperature sensor withNodeMCU.
The DHT11 (or DHT22 and similar) are cheap temperature and humidity sensors. The communicate with a ESP8266 is over a single wire, but unfortunately it is not compatible with the 1-Wire protocol defined by Dallas Semiconductors.
The electric connection to the NodeMCU is very simple, as the DHT series can be powered direct with 3.3V. Only 3 wires are needed: VCC, GND and the data line.
This tutorial provides AT commands based on ESP8266_NONOS_SDK and explain how to use them. AT command set is divided into: Basic AT commands, Wi-Fi AT commands, and TCP/IP AT commands.
ESP8266 is a powerful controller with 4Mbytes of Flash and 84Kbytes of RAM. Then why you should use it as just Serial to WiFi module. I recommend use ESP with direct flashing i.e. without using AT commands.
Espressif’s ESP8266 delivers highly integrated Wi-Fi SoC solution to meet user’s continuous demands for efficient power usage, compact design and reliable performance
in the Internet of Things industry.
With the complete and self-contained Wi-Fi networking capabilities, ESP8266EX can perform either as a standalone application or as the slave to a host MCU. When ESP8266EX hosts the application, it promptly boots up from the flash. The integrated high-speed cache helps to increase the system performance and optimize the system memory. Also, ESP8266EX can be applied to any microcontroller design as a Wi-Fi adaptor through SPI/SDIO or UART interfaces.