![\"esp8266_thumbnail\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/03\/esp8266_thumbnail.jpg?resize=437%2C326&quality=100&strip=all&ssl=1\")
<\/p>\nIn this project you’re going to create a simple HTTP client with an\u00a0ESP8266 WiFi module. Having your ESP8266 connected to your network, it requests the current Bitcoin price. This is an example on how to \u00a0retrieve data from the web.<\/p>\n
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Before you read this post, I recommend reading\u00a0these tutorials about\u00a0the ESP8266:<\/p>\n
NodeMCU\u00a0is a firmware that allows you to program the ESP8266 modules with LUA script. And you’ll find it very similar to the way you program your Arduino. With just a few lines of code you can establish a WiFi connection, control the ESP8266 GPIOs, turning your\u00a0ESP8266 into a web server\u00a0and a lot more.\u00a0Follow this tutorial to Flash your ESP8266 with NodeMCU.<\/strong><\/a><\/p>\n You can\u00a0click here<\/a>\u00a0to compare the ESP-01 Board price at different stores (read Best ESP8266 Wi-Fi Development Board<\/a>)<\/p>\n The schematics for this project are very straight forward. You only need to establish a serial communication between your FTDI programmer and your ESP8266. You can\u00a0check this page<\/a>\u00a0to get an FTDI programmer at the best price.<\/p>\n You can use the preceding links or go directly to MakerAdvisor.com\/tools<\/a> to find all the parts for your projects at the best price!<\/p> I recommend using the ESPlorer<\/a> program created by 4refr0nt\u00a0to create and save LUA files into your\u00a0ESP8266. Follow these instructions to download and install ESPlorer:<\/p>\n When you open the ESPlorer you should see a window similar to the preceding Figure, follow these instructions to send commands to your ESP8266:<\/p>\n Note: You need to add your\u00a0own network credentials to line 2.<\/strong><\/p>\n View raw code<\/a><\/p>\n Then you simply click the button\u00a0Send to ESP. <\/strong>And you should see a query appearing in your screen with the current Bitcoin price and a few other details.\u00a0<\/strong>Everything that you need to worry about or change is highlighted in red box in the following Figure.<\/p>\nWhere to buy?<\/h2>\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/01\/ESP01v0.jpg?resize=224%2C224&quality=100&strip=all&ssl=1\")
<\/a><\/p>\nSchematics (3.3V FTDI\u00a0Programmer)<\/h2>\n
![\"esp8266_pinout_h-569x236\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/01\/esp8266_pinout_h-569x236.png?resize=547%2C227&quality=100&strip=all&ssl=1\")
Wiring:<\/p>\n\n
![\"ESP-Bitcoin-price_bb\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/03\/ESP-Bitcoin-price_bb.png?resize=588%2C216&quality=100&strip=all&ssl=1\")
<\/p>\n![](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/header-200.png?w=1200&quality=100&strip=all&ssl=1\")
<\/a><\/p>\nDownloading ESPlorer<\/h2>\n
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![\"esplorer](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/02\/esplorer-start.png?resize=424%2C316&quality=100&strip=all&ssl=1\")
<\/p>\nHow to send commands\u00a0to your ESP8266<\/h2>\n
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wifi.setmode(wifi.STATION)\nwifi.sta.config("YOUR_NETWORK_NAME","YOUR_NETWORK_PASSWORD")\nprint(wifi.sta.getip())\nconn=net.createConnection(net.TCP, 0) \nconn:on("receive", function(conn, payload) print(payload) end )\nconn:connect(80,"api.coindesk.com")\nconn:send("GET \/v1\/bpi\/currentprice.json HTTP\/1.1\\r\\nHost: api.coindesk.com\\r\\nConnection: keep-alive\\r\\nAccept: *\/*\\r\\n\\r\\n")\n<\/code><\/pre>\n\t![\"esplorer_bitcoin_price\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/03\/esplorer_bitcoin_price.png?resize=762%2C551&quality=100&strip=all&ssl=1\")
<\/p>\nRetrieved Data<\/h2>\n
![\"send_current_line\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/03\/send_current_line.png?resize=376%2C174&quality=100&strip=all&ssl=1\")
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