{"id":1678,"date":"2023-01-21T18:37:48","date_gmt":"2023-01-22T02:37:48","guid":{"rendered":"https:\/\/xyzcreativeworks.com\/?p=1678"},"modified":"2023-01-21T18:38:35","modified_gmt":"2023-01-22T02:38:35","slug":"build-a-cloud-raspberry-pi-pico-w-temperature-humidity-logger","status":"publish","type":"post","link":"https:\/\/xyzcreativeworks.com\/build-a-cloud-raspberry-pi-pico-w-temperature-humidity-logger\/","title":{"rendered":"Build a cloud Raspberry Pi Pico W temperature\/humidity logger"},"content":{"rendered":"\n<p>I live in a pretty humid part of the world and that has left me worried for some of my valuables.<\/p>\n\n\n\n<p>If you live in a place with high humidity, your camera lenses, inflatable watercraft and leather shoes can break down much faster.<\/p>\n\n\n\n<p>I have designated a cabinet as a &#8220;low-humidity zone&#8221;, in an air-conditioned room and desiccant pellets within this cabinet.<\/p>\n\n\n\n<p>I found myself needing something that could tell me the temperature and humidity of the cabinet. Plus, I wanted to connect it online for temperature logging purposes.<\/p>\n\n\n\n<p>Here&#8217;s how to build something like this.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"parts-needed\">Parts needed<\/h2>\n\n\n<ul>\n<li>Raspberry Pi Pico W with headers (or buy a Pico WH)<\/li>\n\n\n\n<li>Quad 7-segment LED display modules using the TM1637 LED driver<\/li>\n\n\n\n<li>DHT22 (or DHT11, BME*** board)<\/li>\n\n\n\n<li>Breadboard<\/li>\n\n\n\n<li>Jumper wires<\/li>\n<\/ul>\n\n\n\n<p>I used a DHT22 but you can use a DHT11 or a BME280, 680, 688 board. The code below uses a DHT22, so you will have to modify the code if you use something else.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"pico-w-references\">Pico W references<\/h2>\n\n\n<p><a href=\"https:\/\/picockpit.com\/raspberry-pi\/everything-about-the-raspberry-pi-pico-w\/#Flashing_the_MicroPython_UF2\" rel=\"nofollow\">Flashing your Pico W<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/picockpit.com\/raspberry-pi\/everything-about-the-raspberry-pi-pico-w\/#Uploading_files_to_your_Raspberry_Pi_Pico_W\" rel=\"nofollow\">Uploading files to Pico W<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-1024x683.jpg\" alt=\"\" class=\"wp-image-1721\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-1024x683.jpg 1024w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-650x433.jpg 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-768x512.jpg 768w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-1536x1024.jpg 1536w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-2048x1365.jpg 2048w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-1200x800.jpg 1200w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/IMG_9491-1980x1320.jpg 1980w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">A basic Raspberry Pi Pico W temperature\/humidity reader<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"lets-build-a-basic-temperaturehumidity-reader\">Let&#8217;s build a basic temperature\/humidity reader<\/h2>\n\n\n<p>I generally prefer to build a basic device before I start connecting it online.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"738\" height=\"642\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/dht22-tm1637-pico-w_bb-3.png\" alt=\"\" class=\"wp-image-1687\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/dht22-tm1637-pico-w_bb-3.png 738w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/dht22-tm1637-pico-w_bb-3-650x565.png 650w\" sizes=\"(max-width: 738px) 100vw, 738px\" \/><\/figure>\n\n\n\n<p>First up, let&#8217;s connect the components up.<\/p>\n\n\n\n<p>The diagram is a bit complicated, so here&#8217;s how you can connect everything.<\/p>\n\n\n<h3 class=\"wp-block-heading\" id=\"3v3gnd-connections\">3V3\/GND connections<\/h3>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Pin on Pico W<\/td><td>Destination<\/td><\/tr><tr><td>3.3V<\/td><td>VCC on display and DHT22<\/td><\/tr><tr><td>GND<\/td><td>GND on both devices<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"dht22-connections\">DHT22 connections<\/h3>\n\n\n<p>With the DHT22 facing you, the pins are, from left to right:<\/p>\n\n\n\n<p>VCC, DATA, null pin, GND<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Pin on Pico W<\/td><td>Destination<\/td><\/tr><tr><td>GPIO10<\/td><td>DHT22 DATA with 10K resistor in between<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<h3 class=\"wp-block-heading\" id=\"led-display-with-tm1637\">LED display with TM1637<\/h3>\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Pin on Pico W<\/td><td>Destination<\/td><\/tr><tr><td>GPIO16<\/td><td>CLK<\/td><\/tr><tr><td>GPIO17<\/td><td>DIO<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"coding-the-pico-w-temphumidity-logger\">Coding the Pico W temp\/humidity logger<\/h2>\n\n\n<pre class=\"wp-block-code\"><code>import tm1637\nfrom machine import Pin\nimport dht\nimport time\n\ntm = tm1637.TM1637(clk=Pin(16), dio=Pin(17))\n\ndht22 = dht.DHT22(Pin(10))\n\nwhile True:\n    try:\n        dht22.measure()\n        print(f\"temp:{dht22.temperature()}, humidity:{dht22.humidity()}\")\n        tm.numbers(int(dht22.temperature()), int(dht22.humidity()), colon=True)\n        time.sleep(2)\n        \n    except:\n        tm.show('errr')<\/code><\/pre>\n\n\n\n<p>You will need the <a href=\"https:\/\/github.com\/mcauser\/micropython-tm1637\" rel=\"nofollow\">TM1637 library<\/a>. Here&#8217;s how to use it:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"238\" height=\"112\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-2.png\" alt=\"Copying a library into the Pico W.\" class=\"wp-image-1688\"\/><figcaption class=\"wp-element-caption\">Here&#8217;s how you put a library on the Pico W. The &#8220;&#8230;&#8221; is actually an __init__.py file.<\/figcaption><\/figure><\/div>\n\n\n<ul>\n<li>Go to the link. <a href=\"https:\/\/github.com\/mcauser\/micropython-tm1637\/blob\/master\/tm1637.py\">Download the tm1637.py file<\/a>.<\/li>\n\n\n\n<li>In your Pico W, create a folder called tm1637. In it, copy the downloaded Python file and rename it __init__.py . Two underscores on each side. <\/li>\n<\/ul>\n\n\n\n<p>The code should be self-explanatory. Or maybe it&#8217;s because I coded it so it&#8217;s obvious. Here&#8217;s an explanation of the specific choices I have made:<\/p>\n\n\n\n<p><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>        dht22.measure()\n\n        tm.numbers(int(dht22.temperature()), int(dht22.humidity()), colon=True)\n\n        time.sleep(2)\n        \n    except:\n        tm.show('errr')<\/code><\/pre>\n\n\n\n<p>In order to get a reading from a DHT22, you must &#8220;kickstart it&#8221; using the <code>measure() method<\/code>.<\/p>\n\n\n\n<p>Then, the next line tells the TM1637 library to display two numbers, separated by a colon. On the left of the colon is the temperature. On the right is the relative humidity.<\/p>\n\n\n\n<p>Randoms who see this won&#8217;t get it. It&#8217;s one of those IYKYK situations.<\/p>\n\n\n\n<p>If you&#8217;re American, you might want to change it to display Fahrenheit. Use these line instead: <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    print(f\"temp:{dht22.temperature() * 9\/5 + 32}, humidity:{dht22.humidity()}\")\n\n    tm.numbers(int(dht22.temperature() * 9\/5 + 32), int(dht22.humidity()), colon=True)<\/code><\/pre>\n\n\n\n<p>If you live in places where it gets over 99 F or below zero C\/F, you&#8217;re going to get an error. I didn&#8217;t handle these errors because my device is meant to be indoors.<\/p>\n\n\n\n<p>At the end, there&#8217;s a <code>time.sleep(2)<\/code>. This means the values refresh every two seconds. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"729\" height=\"359\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-3.png\" alt=\"Thonny Pico W device is busy fix\" class=\"wp-image-1693\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-3.png 729w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-3-650x320.png 650w\" sizes=\"(max-width: 729px) 100vw, 729px\" \/><figcaption class=\"wp-element-caption\">Press CTRL+C to get out of this problem with the Pico W.<\/figcaption><\/figure>\n\n\n\n<p>This makes the Pico W very busy. You might notice that Thonny can&#8217;t access the Pico W. In this case, just use CTRL+C to interrupt the process.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"logging-your-pico-w-data-to-the-cloud-using-anvil\">Logging your Pico W data to the cloud using Anvil<\/h2>\n\n\n<p>This is where the Pico W becomes the tool of choice.<\/p>\n\n\n\n<p>You could achieve the above with the regular Pico, but it&#8217;s only with a Pico W would you be able to log data online.<\/p>\n\n\n\n<p>I wanted to log temperate and humidity data online because I want to identify trends. For example: how much do conditions change when I open the door? It might also help me recognize issues such as my desiccant losing its efficacy.<\/p>\n\n\n\n<p>I decided to use Anvil.<\/p>\n\n\n\n<p>Anvil is amazing because it cuts your workload significantly. Your other options are to connect your Pico W to Google Sheets directly (tough because of OAuth), or use an intermediary like IFTTT (no GUI).<\/p>\n\n\n\n<p>Anvil gives you the ability to build a GUI using its drag-and-drop interface. It also allows you to skip writing a lot of code such as the WiFi connection code, error handling and many more. It&#8217;s impressive.<\/p>\n\n\n\n<p>Read <a href=\"https:\/\/anvil.works\/pico\/get-started\" rel=\"nofollow\">Anvil&#8217;s quickstart guide<\/a> which will walk you through connecting the Pico W with Anvil&#8217;s servers. <\/p>\n\n\n\n<p><a href=\"https:\/\/github.com\/anvil-works\/anvil-pico\/releases\" rel=\"nofollow\">Download the UF2 file here.<\/a><\/p>\n\n\n\n<p>For this tutorial, the quickstart&#8217;s relevancy ends at the heading &#8220;Understanding the main.py file&#8221;. Everything before that should be read.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"coding-the-pico-w-for-anvil\">Coding the Pico W for Anvil<\/h2>\n\n\n<p>After you have flashed the UF2 file, the Pico W will have two files: <strong>boot.py <\/strong>and <strong>main.py<\/strong>.<\/p>\n\n\n\n<p>You should go into <strong>boot.py<\/strong> and type in your WiFi creds.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-4.png\" alt=\"Anvil Pico W boot.py. Add your SSID and password here. Save. That's all.\" class=\"wp-image-1701\" width=\"610\" height=\"282\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-4.png 798w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-4-650x301.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-4-768x355.png 768w\" sizes=\"(max-width: 610px) 100vw, 610px\" \/><figcaption class=\"wp-element-caption\">Anvil Pico W <strong>boot.py<\/strong>. Add your SSID and password here. Save. That&#8217;s all.<\/figcaption><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"create-an-app-in-anvil\">Create an app in Anvil<\/h2>\n\n\n<p>Sign up for Anvil. Log into your dashboard. Click &#8220;New Blank App&#8221;. In the pop-up, choose Material Design 3.<\/p>\n\n\n\n<p>Note that I am using the Beta editor. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"625\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-6-1024x625.png\" alt=\"\" class=\"wp-image-1704\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-6-1024x625.png 1024w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-6-650x396.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-6-768x468.png 768w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-6-1200x732.png 1200w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-6.png 1523w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>For now, we want to be able to get the Pico W to log data into a Data Table (i.e. a spreadsheet). <\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"anvil-uplink-notes\">Anvil uplink notes<\/h2>\n\n\n<p>You can use the Client Uplink Key in your <strong>main.py<\/strong> constant <code>UPLINK_KEY<\/code>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"581\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-11-1024x581.png\" alt=\"\" class=\"wp-image-1709\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-11-1024x581.png 1024w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-11-650x369.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-11-768x436.png 768w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-11-1200x681.png 1200w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-11.png 1220w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"add-anvil-server-module\">Add Anvil Server Module<\/h2>\n\n\n<p>Add a server module on the left sidebar.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"482\" height=\"326\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-7.png\" alt=\"\" class=\"wp-image-1705\"\/><\/figure>\n\n\n\n<p>You will need this code in order to log time, temp and humidity into a Data Table named <strong>dht22<\/strong>.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import anvil.tables as tables\nimport anvil.tables.query as q\nfrom anvil.tables import app_tables\nimport anvil.server\nfrom datetime import datetime\n\n@anvil.server.callable\ndef log_dht22(t, h):\n  print (\"successfully logged\")\n  app_tables.dht22.add_row(timestamp= datetime.now(), temp = t, humidity = h)<\/code><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"add-a-data-table-in-anvil\">Add a Data Table in Anvil<\/h2>\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-8.png\" alt=\"\" class=\"wp-image-1706\" width=\"474\" height=\"270\"\/><\/figure>\n\n\n\n<p>Click on the barrel on the sidebar and click &#8220;Add New Table&#8221;. Rename the Data Table as &#8220;dht22&#8221; by double-clicking,<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"589\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-9.png\" alt=\"\" class=\"wp-image-1707\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-9.png 940w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-9-650x407.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-9-768x481.png 768w\" sizes=\"(max-width: 940px) 100vw, 940px\" \/><\/figure>\n\n\n\n<p>Add three columns: <\/p>\n\n\n\n<ul>\n<li><strong>timestamp<\/strong> (Date and Time)<\/li>\n\n\n\n<li><strong>temp<\/strong> (number)<\/li>\n\n\n\n<li><strong>humidity <\/strong>(number)<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"393\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-10-1024x393.png\" alt=\"\" class=\"wp-image-1708\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-10-1024x393.png 1024w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-10-650x249.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-10-768x295.png 768w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-10.png 1176w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n<h2 class=\"wp-block-heading\" id=\"coding-the-pico-w-to-log-data-to-anvil\">Coding the Pico W to log data to Anvil<\/h2>\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"776\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/pico-w-temperature-humidity-cloud-logger.jpg\" alt=\"pico w temperature humidity cloud logger\" class=\"wp-image-1717\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/pico-w-temperature-humidity-cloud-logger.jpg 1000w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/pico-w-temperature-humidity-cloud-logger-650x504.jpg 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/pico-w-temperature-humidity-cloud-logger-768x596.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>import anvil.pico\nimport uasyncio as a\nimport tm1637\nfrom machine import Pin\nimport dht\nimport time\n\nUPLINK_KEY = \"XXXXXXXXXXXXXXXX-CLIENT\"\n\n# init components\ntm = tm1637.TM1637(clk=Pin(16), dio=Pin(17))\ndht22 = dht.DHT22(Pin(10))\n\n\nasync def start_log():\n    time_elapsed = 0  # counter so that logs to Anvil happen only once time_elapsed = x\n\n    while True:\n        try:\n            dht22.measure()\n            t = int(dht22.temperature())\n            h = int(dht22.humidity())\n\n            tm.numbers(t, h, colon=True)  # colon = middle colon of display\n\n            if time_elapsed &gt;= 5:\n                print(f\"temp:{t}, humidity:{h}, time_elapsed:{time_elapsed}\")\n                # call server func log_dht22 and pass args\n                x = await anvil.pico.call(\"log_dht22\", t, h)\n                time_elapsed = 0  # reset time_elapsed\n                tm.show('logg')\n\n            time_elapsed += 1\n            time.sleep(1)\n\n        except Exception as e:\n            print(e)\n            tm.show('errr')\n\n\nanvil.pico.connect(UPLINK_KEY, on_first_connect=start_log(),\n                   on_every_connect=start_log())\n<\/code><\/pre>\n\n\n\n<p>As you can see, there are a few changes here as compared to the original code.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"creating-a-graphical-representation-on-anvil\">Creating a graphical representation on Anvil<\/h2>\n\n\n<p>You can see your data in table format by going to Data Tables -&gt; dht22.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"696\" height=\"499\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-14.png\" alt=\"\" class=\"wp-image-1718\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-14.png 696w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-14-650x466.png 650w\" sizes=\"(max-width: 696px) 100vw, 696px\" \/><\/figure>\n\n\n\n<p>But if you want it in a graphical view, here&#8217;s how:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"998\" height=\"539\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-15.png\" alt=\"\" class=\"wp-image-1719\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-15.png 998w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-15-650x351.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-15-768x415.png 768w\" sizes=\"(max-width: 998px) 100vw, 998px\" \/><\/figure>\n\n\n\n<p>This guide by <a href=\"https:\/\/anvil.works\/learn\/tutorials\/dashboard\/chapter-1\">Anvil is pretty useful on pulling data from the Data Table to the dashboard<\/a>, but you must follow the steps 1-3 and modify it to suit your use case.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"511\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-13-1024x511.png\" alt=\"\" class=\"wp-image-1715\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-13-1024x511.png 1024w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-13-650x324.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-13-768x383.png 768w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-13-1200x599.png 1200w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-13.png 1437w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Basically, you drag and drop a Plot to your dashboard in the Design tab, then go into the Code or Split tab and add these lines of codes (in bold)<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"496\" src=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-12-1024x496.png\" alt=\"\" class=\"wp-image-1714\" srcset=\"https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-12-1024x496.png 1024w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-12-650x315.png 650w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-12-768x372.png 768w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-12-1200x581.png 1200w, https:\/\/xyzcreativeworks.com\/wp-content\/uploads\/2023\/01\/image-12.png 1445w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>#imports truncated.\n\nclass Form1(Form1Template):\n  def __init__(self, **properties):\n    # Set Form properties and Data Bindings.\n    self.init_components(**properties)\n\n<strong>    self.build_dht_graph()\n<\/strong>\n    # Any code you write here will run before the form opens.\n\n  def plot_1_click(self, points, **event_args):\n    \"\"\"This method is called when a data point is clicked.\"\"\"\n    pass\n\n <strong> def build_dht_graph(self):\n    # Get the data from our server function, and store it as 'db_data'\n    db_data = anvil.server.call('get_data')\n\n    # Create a Bar plot with this data, and change the colour of the markers\n    self.plot_1.data = go.Bar(\n    x = &#91;x&#91;'timestamp'] for x in db_data],\n    y = &#91;x&#91;'humidity'] for x in db_data],\n    marker=dict(color='#2196f3')\n    )<\/strong><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>I live in a pretty humid part of the world and that has left me worried for some of my valuables.","protected":false},"author":1,"featured_media":1717,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","footnotes":""},"categories":[12],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Build a cloud Raspberry Pi Pico W temperature\/humidity logger - Xuyun Zeng<\/title>\n<meta name=\"description\" content=\"It&#039;s really EASY to build a temperature and humidity logger with a Raspberry Pi Pico W, DHT22 and a 4-digit LED display\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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Zeng","author_link":"https:\/\/xyzcreativeworks.com\/author\/xuyunzeng\/"},"uagb_comment_info":0,"uagb_excerpt":"I live in a pretty humid part of the world and that has left me worried for some of my valuables. 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