{"id":637,"date":"2026-03-07T17:28:22","date_gmt":"2026-03-07T22:28:22","guid":{"rendered":"https:\/\/alpharesearch.de\/?p=637"},"modified":"2026-03-07T17:48:59","modified_gmt":"2026-03-07T22:48:59","slug":"nelko-pm220-t45r-linux-bluetooth-setup-guide","status":"publish","type":"post","link":"https:\/\/alpharesearch.de\/?p=637","title":{"rendered":"Nelko PM220 (T45R) Linux USB and Bluetooth Setup Guide"},"content":{"rendered":"\n<p><a href=\"https:\/\/nelko.com\/pages\/driver-user-manual\">https:\/\/nelko.com\/pages\/driver-user-manual<\/a><\/p>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-85f6c258-5c9a-4968-81d4-3657a94e4b5d\" href=\"https:\/\/alpharesearch.de\/wp-content\/uploads\/2026\/03\/PM220.ppd_.zip\">PM220.ppd<\/a><a href=\"https:\/\/alpharesearch.de\/wp-content\/uploads\/2026\/03\/PM220.ppd_.zip\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-85f6c258-5c9a-4968-81d4-3657a94e4b5d\">Download<\/a><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Nelko PM220 (T45R) Linux Setup Guide: USB &amp; Bluetooth<sup><\/sup><sup><\/sup><\/h2>\n\n\n\n<p id=\"p-rc_b1f2706e26cf2fad-28\">If you\u2019ve struggled to get the <strong>Nelko PM220<\/strong> (or similar T45R-chipset thermal printers) working on a modern Linux distro, this post is for you. We discovered that the \u201cGolden Path\u201d to a stable setup involves perfecting the USB connection first before moving to wireless.<sup><\/sup><sup><\/sup><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. The Mandator<sup><\/sup>y First Step: USB Setup<sup><\/sup><\/h2>\n\n\n\n<p id=\"p-rc_b1f2706e26cf2fad-29\"><strong>Always get the printer working via USB before attempting Bluetooth.<\/strong> This ensures your driver and PPD are correctly configured without the added complexity o<sup><\/sup>f wireless permissions.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The Driver<\/strong>: Use the official <strong>PL70e<\/strong> Linux driver package. The <code>rastertolabel<\/code> binary in this package is the most stable engine for the PM220.<\/li>\n\n\n\n<li><strong>The PPD<\/strong>: Modify your PPD to point to the <code>Nelko\/Filter\/rastertolabel<\/code> filter.<\/li>\n\n\n\n<li><strong>Key Settings<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Ensure the <code>Resolution<\/code> line uses <code>cupsColorSpace 0<\/code> (Grayscale) and <code>cupsBitsPerColor 8<\/code>.<\/li>\n\n\n\n<li>Include <code>*cupsModelNumber: 20<\/code> in the metadata.<\/li>\n\n\n\n<li><em>If the printer works via USB but fails later on Bluetooth, you know the issue is a connection permission, not a driver fault.<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. Connecting via Bluetooth SPP<sup><\/sup><sup><\/sup><sup><\/sup><sup><\/sup><\/h2>\n\n\n\n<p id=\"p-rc_b1f2706e26cf2fad-31\">Once USB printing is successful, you can move to wireless by mapping the Bluetooth signal to a legacy serial device node.<sup><\/sup><sup><\/sup><sup><\/sup><sup><\/sup><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pairing<\/strong>: Use your system Bluetooth manager to pair with the <strong>PM220<\/strong> (MAC: <code>31:9D:7B:7A:C1:9A<\/code>).<\/li>\n\n\n\n<li><strong>The Serial Checkbox<\/strong>: Ensure \u201cSerial Port\u201d or \u201cSPP\u201d is enabled in your Bluetooth settings. This creates <code>\/dev\/rfcomm0<\/code>.<\/li>\n\n\n\n<li><strong>User Groups<\/strong>: You must add your user to the <code>lp<\/code> and <code>dialout<\/code> groups:<\/li>\n<\/ul>\n\n\n\n<p>Bash<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo usermod -a -G lp,dialout $USER\n<\/code><\/pre>\n\n\n\n<p><em>(Note: You must log out and back in for this to take effect.)<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The Persistence Rule<\/strong>: Create a <code>udev<\/code> rule at <code>\/etc\/udev\/rules.d\/99-pm220.rules<\/code> so the <code>lp<\/code> group always owns the port:<\/li>\n<\/ul>\n\n\n\n<p>Plaintext<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>KERNEL==\"rfcomm*\", GROUP=\"lp\", MODE=\"0660\"\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. The \u201cSilent Gatekeeper\u201d: AppArmor<sup><\/sup><sup><\/sup><\/h2>\n\n\n\n<p id=\"p-rc_b1f2706e26cf2fad-36\">Even with the correct groups, modern Linux security (<strong>AppArmor<\/strong>) often blocks the CUPS serv<sup><\/sup>ice from writing to Bluetooth nodes, resu<sup><\/sup>lting in a <strong>\u201cPermission Denied\u201d<\/strong> error.<\/p>\n\n\n\n<p><strong>The Fix:<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Edit the local CUPS profile:Bash<code>sudo nano \/etc\/apparmor.d\/local\/usr.sbin.cupsd<\/code><\/li>\n\n\n\n<li>Add this permission line inside the file:Plaintext<code>\/dev\/rfcomm[0-9]* rw,<\/code><\/li>\n\n\n\n<li>Reload AppArmor:Bash<code>sudo systemctl reload apparmor<\/code><\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Configuring CUPS<\/h2>\n\n\n\n<p>Set your device URI to the serial node created by your Bluetooth manager.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Printer URI<\/strong>: <code>serial:\/dev\/rfcomm0<\/code><\/li>\n\n\n\n<li><strong>CLI Setup Command<\/strong>:<\/li>\n<\/ul>\n\n\n\n<p>Bash<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo lpadmin -p Nelko_PM220_BT -v serial:\/dev\/rfcomm0 -E -P \/path\/to\/your_modified.ppd\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. Troubleshooting &amp; Maintenance<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Testing the Pipe<\/strong>: Verify the Bluetooth link by bypassing CUPS and sending raw TSPL code:<\/li>\n<\/ul>\n\n\n\n<p>Bash<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>echo -e \"\\x1b\\x40\\x0aSIZE 40 mm,30 mm\\x0aPRINT 1\\x0a\" &gt; \/dev\/rfcomm0\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Baud Rate<\/strong>: Ensure the virtual port is set to <strong>115200<\/strong> in <code>raw<\/code> mode:<\/li>\n<\/ul>\n\n\n\n<p>Bash<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo stty -F \/dev\/rfcomm0 115200 raw -echo\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Important: Paper Handling Behavior<\/h2>\n\n\n\n<p>The printer\u2019s behavior when closing the lid depends entirely on the media used:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>With Labels<\/strong>: The printer feeds slightly to calibrate, detects the gap, and <strong>sucks the label back in<\/strong> to the correct start position.<\/li>\n\n\n\n<li><strong>With POS (Continuous) Paper<\/strong>: Because there is no gap to detect, the printer feeds approximately <strong>20cm of waste paper<\/strong>. This is a firmware-level self-test and cannot be overridden by the driver.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/nelko.com\/pages\/driver-user-manual Nelko PM220 (T45R) Linux Setup Guide: USB &amp; Bluetooth If you\u2019ve struggled to get the Nelko PM220 (or similar T45R-chipset thermal printers) working on a modern Linux distro, this post is for you. We discovered that the \u201cGolden Path\u201d to a stable setup involves perfecting the USB connection first before moving to wireless. 1. &hellip; <a href=\"https:\/\/alpharesearch.de\/?p=637\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Nelko PM220 (T45R) Linux USB and Bluetooth Setup Guide<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-637","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/alpharesearch.de\/index.php?rest_route=\/wp\/v2\/posts\/637","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alpharesearch.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alpharesearch.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alpharesearch.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alpharesearch.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=637"}],"version-history":[{"count":12,"href":"https:\/\/alpharesearch.de\/index.php?rest_route=\/wp\/v2\/posts\/637\/revisions"}],"predecessor-version":[{"id":652,"href":"https:\/\/alpharesearch.de\/index.php?rest_route=\/wp\/v2\/posts\/637\/revisions\/652"}],"wp:attachment":[{"href":"https:\/\/alpharesearch.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alpharesearch.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alpharesearch.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}