An Inexpensive IoT Enabler Using ESP8266 A major component of or rather the very concept, Internet of Things, is about how to connect various devices to the network so that they can both send data and receive commands. Various technologies to address the last mile connectivity, such as bluetooth, wifi, NFC, etc. already exist, but most of these are complicated to deploy and often need additional hardware such as a local control server or appliance. adidas donna In this instructable, I show you how to build and configure a simple standalone board that with the help of a wifi network can send environmental data to the internet and receive control commands to turn on/off a switch. Adidas Stan Smith Dames This project, which can be built for less than 10 or 15 US$ does the following: Send temperature/humidity readings from a DHT11 sensor to a MQTT broker and a Thingspeak channel. Listen for MQTT messages and turn on or off a relay connected to ESP8266. Check a Thingspeak channel periodically and turn on/off a relay if the field has been updated. In simple terms, this is a internet enabled temperature/humidity sensor cheap jerseys and relay. The relay acts a two way switch and can be used to turn on/off any AC appliance connected to it. Asics Pas Cher The parts needed cost only less than 15 US$ and absolutely no other hardware is needed. Nike Air Max 2017 Heren groen The software used is all open source and only free online services have been used to connect the board to the internet. It is assumed there is a working wifi network available for the board to connect to. air max 1 femme Although a few instructables that show you how to configure a ESP8266 module to push data to the internet already exist, I have not seen a solution which also lets you control a device attached to the ESP8266 module by receiving commands from the internet. This instructable shows ways to do that easily. Step 1: BasicsWhat is ESP8266?ESP8266 is a highly integrated chip designed for the needs of a new connected world. It was designed as an extremely lightweight publish/subscribe messaging transport. It is useful for connections with remote locations where a small code footprint is required and/or network bandwidth is at a premium. For example, it has been used in sensors communicating to a broker via satellite link, over occasional dial up connections with healthcare providers, and in a range of home automation and small device scenarios. What is Thingspeak?ThingSpeak is an open source «Internet of Things» application and API to store and retrieve data from things using HTTP over the Internet or via a Local Area Network. nike running goedkoop The board can be powered either by just the USB cable or through a 5v DC supply connected to the power socket at the top. A LM1117 3.3 LDO is used to get 3.3v needed for the ESP8266 module. A DHT11 sensor is connected to GPIO2 pin of ESP8266. The GPIO0 pin can be connected to the ground or relay based on the jumper position. Maglia Dwyane Wade The board pushes temperature and humidity readings as well as the relay state to: MQTT broker: Any MQTT () broker can be used. nike air max femme pas cher You would need to create an account as well as an instance. Nike Air Max 90 męskie An advantage of using an online broker is that it can be accessed from any network.