{"id":30752,"date":"2020-04-03T14:06:27","date_gmt":"2020-04-03T06:06:27","guid":{"rendered":"https:\/\/blog.seeedstudio.com\/?p=30752"},"modified":"2020-04-08T15:34:33","modified_gmt":"2020-04-08T07:34:33","slug":"wio-terminal-update-how-to-integrate-with-raspberry-pi","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2020\/04\/03\/wio-terminal-update-how-to-integrate-with-raspberry-pi\/","title":{"rendered":"Wio Terminal Update: How to Integrate with Raspberry Pi and Display the System Data on LCD Screen"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"420\" height=\"235\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2020\/04\/wt-pihat.gif\" alt=\"\" class=\"wp-image-30916\"\/><\/figure><\/div>\n\n\n\n<p>Supporting dual-display at resolutions up to 4K, Raspberry Pi is capable of driving almost any kind of screen (Check our post of <a href=\"https:\/\/www.seeedstudio.com\/blog\/2019\/01\/29\/12-popular-raspberry-pi-displays-and-touch-screens\/\">TOP 21 Popular Raspberry Pi Displays &amp; Screens<\/a>!). But when it comes to a portable one with easy setup and stylish outlook, the choice seems limited. <\/p>\n\n\n\n<p>Here we bring you Wio Terminal, an&nbsp;<strong>ATSAMD51-based<\/strong>&nbsp;microcontroller compatible with raspberry Pi, equipped with Screen + Development Board + Input\/Output Interface + Enclosure.  It is integrated with <strong>onboard IMU(LIS3DHTR), microphone, light sensor, infrared emitter(IR 940nm)<\/strong> and two multi-functional Grove ports, which allows Wio Terminal to collect and send environmental data to Raspberry Pi for further process and analysis (i.e, machine learning) without hassle setting of hardware or software. <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1030\" height=\"938\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2020\/04\/Wio-Terminal-KeyFeature-1030x938.png\" alt=\"\" class=\"wp-image-30874\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/04\/Wio-Terminal-KeyFeature-1030x938.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/04\/Wio-Terminal-KeyFeature-300x273.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/04\/Wio-Terminal-KeyFeature-768x700.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/04\/Wio-Terminal-KeyFeature-1536x1399.png 1536w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/04\/Wio-Terminal-KeyFeature-1024x933.png 1024w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2020\/04\/Wio-Terminal-KeyFeature.png 1920w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure><\/div>\n\n\n\n<p>So now you have known its high compatibility with Raspberry Pi, but how does it work? <\/p>\n\n\n\n<p>Wio Terminal can be connected to Raspberry Pi through the 40 pins GPIO header or its USB Type-C connector. Today we will introduce a demo showing how to use Wio Terminal to read and display the system status of Raspberry Pi via USB serial. In this demo, the 40 pin GPIO of Raspberry Pi is not taken and is available for use, which will be more convenient if there are any other Pi hats essential in your Raspberry Pi projects. <\/p>\n\n\n\n<p>We have prepared Python code, Arduino code, and libraries for this demo shown below. For full tutorials and detailed instruction of Wio Terminal, please check our <a href=\"http:\/\/wiki.seeedstudio.com\/Wio-Terminal-Reading-Raspberry-Pi\/\">wiki<\/a>. Also, feel free to submit any technical issues at our <a href=\"https:\/\/forum.seeedstudio.com\/c\/products\/wio-terminal\/85\">forum<\/a>!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Reading Raspberry Pi&#8217;s System Status using Wio Terminal<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Hardware Requirements<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.seeedstudio.com\/Boards-c-17.html\">Raspberry Pi<\/a>&nbsp;(3B+ used here)<\/li><li><a href=\"https:\/\/www.seeedstudio.com\/Wio-Terminal-p-4509.html\">Wio Terminal<\/a><\/li><li>USB Type-C cable<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"raspberry-pi-host-program\">2. Prepare the Raspberry Pi Host Program <\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">2.1 Python Code<\/h4>\n\n\n\n<p>Run the following Python code on Raspberry to send the system information to Wio Terminal via USB Serial.<\/p>\n\n\n\n<p class=\"has-background has-very-light-gray-background-color\"><strong>Note:<\/strong>&nbsp;Please make sure that the Serial port is correct in the Python code, change it according to your device.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import os\nimport time \nimport serial\n\n# Settings for reading from Arduino Serial\nserialPort= \"\/dev\/ttyACM0\" #Change it to your Serial Port, Check in Arudino IDE\nbaudRate = 115200\nser = serial.Serial(serialPort, baudRate, timeout=0.5)\ntime.sleep(2)\n\n# Return CPU temperature as a character string\ndef getCPUtemperature():\n    res = os.popen('vcgencmd measure_temp').readline()\n    return(res.replace(\"temp=\",\"\").replace(\"'C\\n\",\"\"))\n\n# Return RAM information (unit=kb) in a list\n# Index 0: total RAM\n# Index 1: used RAM\n# Index 2: free RAM\ndef getRAMinfo():\n    p = os.popen('free')\n    i = 0\n    while 1:\n        i = i + 1\n        line = p.readline()\n        if i==2:\n            return(line.split()[1:4])\n\n# Return % of CPU used by user as a character string\ndef getCPUuse():\n    return(str(os.popen(\"top -n1 | awk '\/Cpu\\(s\\):\/ {print $2}'\").readline().strip()))\n\n# Return information about disk space as a list (unit included)\n# Index 0: total disk space\n# Index 1: used disk space\n# Index 2: remaining disk space\n# Index 3: percentage of disk used\ndef getDiskSpace():\n    p = os.popen(\"df -h \/\")\n    i = 0\n    while 1:\n        i = i +1\n        line = p.readline()\n        if i==2:\n            return(line.split()[1:5])\n\ndef main():\n    while True:\n        # CPU informatiom\n        CPU_temp = getCPUtemperature()\n        CPU_usage = getCPUuse()\n\n        # RAM information\n        # Output is in kb, here I convert it in Mb for readability\n        RAM_stats = getRAMinfo()\n        RAM_total = str(round(int(RAM_stats[0]) \/ 1000,1))\n        RAM_used = str(round(int(RAM_stats[1]) \/ 1000,1))\n        RAM_free = str(round(int(RAM_stats[2]) \/ 1000,1))\n\n        # Disk information\n        DISK_stats = getDiskSpace()\n        DISK_total = DISK_stats[0]\n        DISK_used = DISK_stats[1]\n        DISK_perc = DISK_stats[3]\n\n        temp=ser.write(str.encode(CPU_temp+' '+CPU_usage))\n\n        data=ser.write(str.encode(CPU_temp+':'+CPU_usage+':'+RAM_total+':'+RAM_used+':'+RAM_free+':'+DISK_total+':'+DISK_used+':'+DISK_perc))\n        ser.flush()\n        time.sleep(2)\n\n        print('')\n        print('CPU Temperature = '+CPU_temp)\n        print('CPU Use = '+CPU_usage)\n        print('')\n        print('RAM Total = '+str(RAM_total)+' MB')\n        print('RAM Used = '+str(RAM_used)+' MB')\n        print('RAM Free = '+str(RAM_free)+' MB')\n        print('')  \n        print('DISK Total Space = '+str(DISK_total)+'B')\n        print('DISK Used Space = '+str(DISK_used)+'B')\n        print('DISK Used Percentage = '+str(DISK_perc)) \n\n\nif __name__ == '__main__':\n    try:    \n        main()\n    except KeyboardInterrupt:    \n        if ser != None:    \n            ser.close()<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2.2 Arduino Code<\/h4>\n\n\n\n<p><strong>Step 1. Install Arduino libraries<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Install the LCD screen Library&nbsp;<code>Seeed_Arduino_LCD<\/code>, please visit&nbsp;<a href=\"http:\/\/wiki.seeedstudio.com\/Wio-Terminal-LCD-Overview\/\">Wio Terminal LCD<\/a>&nbsp;for more information.<\/li><li>Download the&nbsp;<a href=\"https:\/\/files.seeedstudio.com\/wiki\/Wio-Terminal\/res\/Free_Fonts.h\"><code>Free_Fonts.h<\/code><\/a>&nbsp;header file so that you can use abbreviations for the free fonts included in the LCD library. Please make sure to put this header file in the same location as the Arduino Sketch.<\/li><\/ul>\n\n\n\n<p><strong>Step 2. Download the Complete Code<\/strong><\/p>\n\n\n\n<p>Download the complete code&nbsp;<a href=\"https:\/\/files.seeedstudio.com\/wiki\/Wio-Terminal\/res\/readRasp.ino\">here<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. How to Set Up<\/h3>\n\n\n\n<ol class=\"wp-block-list\"><li>Upload the Arduino Code to Wio Terminal. Once uploaded it should be in a starting screen.<\/li><li>Connect Wio Terminal to the Raspberry Pi via USB Type-C Cable.<\/li><li>Run the Python code on Raspberry Pi.<\/li><li>Now, you should be able to see the Raspberry Pi System info on Wio Terminal&#8217;s LCD Screen.<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Explore More at Our Github &amp; Forum<\/h2>\n\n\n\n<p>Want to know more about Wio Terminal? Our brand-new Forum has been released and is waiting for you to join our discussion!  Feel free to post your questions or any technical issue about&nbsp;Wio Terminal&nbsp;at our <a href=\"https:\/\/forum.seeedstudio.com\/c\/products\/wio-terminal\/85\">forum<\/a>.  We can\u2019t wait to hear your voices and welcome all suggestions! <\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Wio Terminal | ATSAMD51 Core with Realtek RTL8720DN BLE 5.0 &amp; Wi-Fi 2.4G\/5G Dev Board\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/HSkqHrpk7FM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>That will be all for today&#8217; update, stay tuned with us and get the latest news about Wio Terminal!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Supporting dual-display at resolutions up to 4K, Raspberry Pi is capable of driving almost any<\/p>\n","protected":false},"author":3487,"featured_media":31117,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"iawp_total_views":0,"footnotes":""},"categories":[1],"tags":[247,3003],"class_list":["post-30752","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-raspberry-pi","tag-wio-terminal"],"yoast_head":"<!-- This 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