\n![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/Wireless-Weather-Station-with-Data-Logging-to-Excel-thumb.jpg?resize=700%2C470&quality=100&strip=all&ssl=1\")
<\/p>\n
Before you continue reading this project, please complete the following tutorials: <\/strong><\/p>\n If you like the ESP WiFi module and you want to build more projects you can download my eBook called \u201cHome Automation using ESP8266\u201d here<\/a>. Let\u2019s get started!<\/strong><\/p>\n Here’s a Figure that describes exactly how everything works together:<\/p>\n Here\u2019s the hardware that you need to make the weather station:<\/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> In this project, we will be using the DS18B20 one wire digital temperature sensor<\/a>. Now, before we get to the programming part, lets learn how to wire up our temperature sensor.<\/p>\n The DS18B20 can be powered by between 3.0V and 5.5V so you can simply connect its GND pin to GND and the VDD pin to 3.3V from the ESP8266.<\/p>\n Then connect the DQ pin to IO04 on the ESP8266. A 4K7 ohm pullup resistor is required on the DQ pin to pull it up to 3.3V.<\/p>\n We’re going to use the ADC pin to read an analog value and when referring to the ESP ADC pin you will often hear these different terms interchangeably:<\/p>\n All these terms refer to the same pin in the ESP8266<\/a> that is highlighted in the next section (read this article for more information on the ADC pin<\/a>).<\/p>\n Currently, TOUT (Pin6) has a 10-bit precision and its input voltage range is 0 to 1.0 V when TOUT is connected to an external circuit.<\/p>\n With the ESP-201<\/a> is very easy to access the ADC, you simply connect a jumper wire to the pin highlighted in the Figure below.<\/p>\n We are going to use the NodeMCU firmware, so you have to flash your ESPs with NodeMCU firmare<\/a>.<\/p>\n I recommend using the ESPlorer IDE which is a program created by 4refr0nt to upload scripts to your ESP8266.<\/p>\n Follow these instructions to download and install ESPlorer IDE:<\/p>\n 1) Click here<\/a> to download ESPlorer<\/p>\n 2) Unzip that folder<\/p>\n 3) Go to the main folder<\/p>\n 4) Run ESPlorer.jar<\/p>\n 5) Open the ESPlorer<\/p>\n The schematics to upload scripts to an ESP are very straight forward. You only need to establish a serial communication between your FTDI programmer and your ESP8266 (repeat the schematics below for the Client and Server).<\/p>\n Here’s the connections:<\/p>\n There are three scripts that you need to upload to your ESP8266 client:<\/p>\n Start by uploading the following script and name it counterMax.lua<\/em>. It is just a numerical number 1 that does some counting and helps reset your board if it looses connection with the ESP server.<\/p>\n View raw code<\/a><\/p>\n When you upload the counterMax.lua <\/em>script it is expected to print the following error:<\/p>\n Upload the script below to read the temperature in \u00baC or upload this script to read temperature in \u00baF<\/a>. Make sure you save the file to your ESP with the name ds18b20.lua<\/em>.<\/p>\n View raw code<\/a><\/p>\n Finally upload the main script to your ESP and name it init.lua<\/em>.<\/p>\n View raw code<\/a><\/p>\n Follow this circuit to build your ESP client and if you are using the ESP-12, you can view the schematics here<\/a>:<\/p>\n The right switch connected to IO05 is used to simulate wind speed. The program currently doesn’t give a real-time wind speed, but a last 5 seconds wind speed average.<\/p>\n So it doesn’t mater how fast you press right switch. If you push right switch 5 times in the 5 seconds sampling period… that translates into once per second average giving 1.492 MPH or 2.4 KMH (at this point we’re using NodeMCU integer version, so you’ll get 1492 MPH and 24 KMH. You’ll have to divide in the spreadsheet by 100 and 10 respectively).<\/p>\n Upload the following script to your ESP and name it init.lua<\/em>.<\/p>\n View raw code<\/a><\/p>\n Follow this circuit to make your ESP server and if you are using the ESP-12, you can view the schematics here<\/a>.<\/p>\n Power both your ESPs and make sure the ESP server still has the serial communication established with your computer, because that’s how you are going to post the data to your Excel spreadsheet.<\/p>\n For this project we are going to use Things Gateway a software by Roberto Valgolio to write data on an Excel spreadsheet and display a self updating real time charts.<\/p>\n Things Gateway is a PC application that connects a microcontroller and makes it able to:<\/p>\n Things Gateway can also connect a GPS and show on the screen:<\/p>\n Go to the Things Gateway<\/a> website, download the program and install it. This project was tested with the Beta4 version.<\/p>\n To launch the Things Gateway application is very straight forward. Go to Your PC > Documents > ThingsGateway<\/em> and open the application.<\/p>\n Then follow these instructions:<\/p>\n Open the RealTime<\/em> tab and select From Serial to Excel<\/em>.<\/p>\n An Excel spreadsheet should appear and your data should start appearing there every few seconds!<\/p>\n Your data is being stored in the example Excel spreadsheet in that folder:<\/p>\n In this tutorial we established a basic system to send data wirelessly to an Excel spreadsheet using 2 ESP8266 and Things Gateway software.<\/p>\n With this example, you’ll be able to explore more features from Things Gateway like:<\/p>\n Further development could also include:<\/p>\n Please note that Things Gateway was designed to use with Arduino board, but as long as you send the proper string via serial, it can be used with any board.<\/p>\n I hope you found this guide helpful and huge thanks to Yves Arbour that created this project!<\/strong><\/p>\n Do you have any questions or feedback? Leave a comment down below.<\/p>\n Thanks for reading. If you like this post probably you might like my next ones, so please support me by subscribing my blog<\/a> and my Facebook Page.<\/p>\n","protected":false},"excerpt":{"rendered":" In this project we are going to establish a wireless communication between two ESPs and send data from three sensors to an Excel spreadsheet. This tutorial shows a wireless weather station with data … <\/p>\n\n
Summary<\/h2>\n
![\"introduction](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/introduction-esp8266-wireless-station.jpg?resize=666%2C281&quality=100&strip=all&ssl=1\")
<\/p>\nParts List<\/h2>\n
\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>\nDS18B20 – One Wire Digital Temperature Sensor<\/h3>\n
![\"DS18B20](\"https:\/\/i0.wp.com\/www.hobbytronics.co.uk\/image\/data\/maxim\/ds18b20-pinout.jpg?resize=223%2C281&quality=100&strip=all&ssl=1\")
<\/p>\nReading ADC Value<\/h3>\n
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Accessing the ESP8266 Analog Pin<\/h3>\n
![\"esp-201\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/esp-201.png?resize=314%2C300&quality=100&strip=all&ssl=1\")
<\/p>\nFlashing Boths ESPs with NodeMCU<\/h2>\n
Downloading ESPlorer IDE<\/h2>\n
Uploading a Script to Your ESP8266 (3.3V FTDI Programmer)<\/h2>\n
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Writing Your Client Scripts<\/h2>\n
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1\n<\/code><\/pre>\n\t![\"uploading](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/uploading-counter-max.png?resize=473%2C257&quality=100&strip=all&ssl=1\")
<\/p>\n--------------------------------------------------------------------------------\n-- DS18B20 one wire module for NODEMCU\n-- LICENCE: http:\/\/opensource.org\/licenses\/MIT\n-- Vowstar <vowstar@nodemcu.com>\n-- Dramatic simplification: Peter Scargill\n--------------------------------------------------------------------------------\n\n-- Set module name as parameter of require\nlocal modname = ...\nlocal M = {}\n_G[modname] = M\n--------------------------------------------------------------------------------\n-- Local used modules\n--------------------------------------------------------------------------------\n-- Table module\nlocal table = table\n-- String module\nlocal string = string\n-- One wire module\nlocal ow = ow\n-- Timer module\nlocal tmr = tmr\n-- Limited to local environment\nsetfenv(1,M)\n--------------------------------------------------------------------------------\n-- Implementation \u2013 you don\u2019t get any shorter than this\n--------------------------------------------------------------------------------\n\nfunction readNumber(pin)\n ow.setup(pin)\n ow.reset(pin)\n ow.write(pin, 0xCC, 1)\n ow.write(pin, 0xBE, 1)\n data = nil\n data = ""\n for i = 1, 2 do\n data = data .. string.char(ow.read(pin))\n end\n t = (data:byte(1) + data:byte(2) * 256) \/ 16\n if (t>100) then\n t=t-4096\n end\n ow.reset(pin)\n ow.write(pin,0xcc,1)\n ow.write(pin, 0x44,1) \n return t \nend\n\n-- Return module table\nreturn M\n<\/code><\/pre>\n\t-- Yves Arbour wireless weather station project with data logging to Excel sheets with Things Gateway\n-- code based on the following\n-- Rui Santos - ESP8266 Client\n-- DS18B20 one wire module for NODEMCU \n-- Vowstar <vowstar@nodemcu.com> \n-- Peter Scargill \n-- Wimp Weather Station by sparkfun Nathan Seidle\n\nwifi.sta.disconnect()\nwifi.setmode(wifi.STATION)\nwifi.sta.config("test","12345678")\nwifi.sta.connect() \nprint("Looking for a connection")\ntemp=0\nfunction readds18b20sensor()\n t=require("ds18b20.lua") \n -- print(t.readNumber(2)) for debuging\n temp = (t.readNumber(2)) --GPIO 04\nend\n\nwinDirection=0\ngpio.mode(0,gpio.INPUT)\nfunction readWindDirection ()\n windDirection = adc.read(0)\n if (windDirection < 26) then windDirection=90 --E\n --if (windDirection < 17) then windDirection=113 -- ESE\n --elseif (windDirection < 21) then windDirection=68 -- ENE\n --elseif (windDirection < 26) then windDirection=90 -- E\n --elseif (windDirection < 36) then windDirection=158 -- SSE\n elseif (windDirection < 43) then windDirection=135 --SE\n --elseif (windDirection < 60) then windDirection=203 -- SSW\n elseif (windDirection < 85) then windDirection=180 --S\n --elseif (windDirection < 98) then windDirection=23 -- NNE\n elseif (windDirection < 120) then windDirection=45 --NE\n --elseif (windDirection < 170) then windDirection=248 -- WSW\n elseif (windDirection < 210) then windDirection=225 -SW\n --elseif (windDirection < 275) then windDirection=338 -- NNW\n elseif (windDirection < 380) then windDirection=0 --N\n --elseif (windDirection < 500) then windDirection=293 -- WNW\n elseif (windDirection < 750) then windDirection=315 --NW\n elseif (windDirection < 1005) then windDirection=270 --W\n else windDirection=-1\n end\nend\nirqPin = 1 --GPIO5\nwindSpeed = 0\nwindClicks = 0\nlastWindCheck = 0\nfunction debounce (func) \n local delay = 100000 \n return function (...) \n now = tmr.now() \n now = now - lastWindCheck \n if now < delay then return end\n lastWindCheck = tmr.now() \n return func (...)\n end\nend\n\nfunction windSpeedIrq () \n windClicks = windClicks+1 * 10000000\n print (windClicks)\nend \nfunction calcWindSpeed ()\n local deltaTime = tmr.now () - lastWindCheck \n windSpeed = windClicks \/ deltaTime\n print(deltaTime) \n windSpeed = windSpeed * 1492 \/10000 -- Replace " *1492\/10000 " with " *24\/100 " for Km\/h instead of Mp\/h\n windClicks = 0\n lastWindCheck = tmr.now()\nend \ngpio.mode(irqPin,gpio.INT)\ngpio.trig(irqPin,"down",debounce(windSpeedIrq))\n \nfile.open("counterMax.lua","r")\ncounter=(file.read())\nfile.close()\n tmr.alarm(0, 2000, 1, function()\n if(wifi.sta.getip()~=nil) then\n tmr.stop(0)\n print("Client IP Address:",wifi.sta.getip())\n cl=net.createConnection(net.TCP, 0)\n cl:connect(80,"192.168.4.1")\n tmr.alarm(1, 5000, 1, function()\n counter=counter+1 \n \n readds18b20sensor() \n readWindDirection()\n calcWindSpeed()\n print (temp)\n print(windSpeed)\n-- Next is the properly formated string that Things Gateway needs to show Date,Time,Wind speed,Wind direction and Temp. \n cl:send("XLS,write,Example,A"..counter..",%date%\\nXLS,write,Example,B"..counter..",%time%\\nXLS,write,Example,C"..counter..","..windSpeed.."\\nXLS,write,Example,D"..counter..","..windDirection.."\\nXLS,write,Example,E"..counter..","..temp)\n \n cl:on("disconnection",function(reconnect)\n file.open("counterMax.lua","w+")\n file.writeline(counter)\n file.close()\n end)\n end)\n else\n print("Connecting...")\n end\nend)\nfunction reconnect() \nwifi.setmode(wifi.STATION)\nwifi.sta.config("test","12345678")\nwifi.sta.connect()\nend \n<\/code><\/pre>\n\tClient Circuit<\/h2>\n
![\"weatherStation-201](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/weatherStation-201-Sketch_bb.png?resize=776%2C491&quality=100&strip=all&ssl=1\")
<\/a><\/p>\nWriting Your Server Script<\/h2>\n
-- Rui Santos - ESP8266 Server\n-- Modified by Yves Arbour to ennable print string to go directly to an Excel sheet with Things Gateway\n\nprint("ESP8266 Server")\nwifi.setmode(wifi.STATIONAP);\nwifi.ap.config({ssid="test",pwd="12345678"});\nprint("Server IP Address:",wifi.ap.getip())\n \nsv = net.createServer(net.TCP)\nsv:listen(80, function(conn)\n conn:on("receive", function(conn, receivedData)\n --print("Received Data"..receivedData)\n print(receivedData)-- string "Received Data" removed...\n --Things Gateway ignores strings that do not start with proper command...\n --XLS in this case for Excel sheet \n end)\n conn:on("sent", function(conn)\n collectgarbage()\n end)\nend)\n<\/code><\/pre>\n\tFinal Server Circuit<\/h2>\n
![\"WirelessWeatherStationServer_201_bb\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/WirelessWeatherStationServer_201_bb-1.png?resize=416%2C618&quality=100&strip=all&ssl=1\")
<\/a>We’ve created a custom PCB for the ESP-201. Here’s the details:<\/p>\n\n
![\"ESP8266](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/ESP8266-with-PCBs.jpg?resize=660%2C280&quality=100&strip=all&ssl=1\")
<\/p>\nPutting Everything Together<\/h3>\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/PC140029.jpg?resize=560%2C420&quality=100&strip=all&ssl=1\")
<\/p>\nDownloading and Installing Things Gateway<\/h2>\n
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\n
![\"ThingsGatewaydownload\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/ThingsGatewaydownload.jpg?resize=367%2C151&quality=100&strip=all&ssl=1\")
<\/p>\nLaunching Your Things Gateway Application<\/h2>\n
![\"things](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/things-gateway-app.jpg?resize=530%2C211&quality=100&strip=all&ssl=1\")
<\/p>\n\n
![\"things](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/things-config.png?resize=361%2C384&quality=100&strip=all&ssl=1\")
<\/p>\nDemonstration<\/h2>\n
![\"ThingsGateway\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/ThingsGateway-1.jpg?resize=460%2C492&quality=100&strip=all&ssl=1\")
<\/p>\n![\"ThingsGateway](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/ThingsGateway-excel.jpg?resize=488%2C446&quality=100&strip=all&ssl=1\")
<\/p>\n![\"things](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2015\/12\/things-gateway-example.jpg?resize=775%2C310&quality=100&strip=all&ssl=1\")
<\/p>\nFuture Improvements<\/h2>\n
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