{"id":140,"date":"2026-03-14T18:30:22","date_gmt":"2026-03-14T17:30:22","guid":{"rendered":"https:\/\/iotlabs.pl\/?p=140"},"modified":"2026-03-14T22:05:31","modified_gmt":"2026-03-14T21:05:31","slug":"wm-bus-gateway","status":"publish","type":"post","link":"https:\/\/iotlabs.pl\/en\/wm-bus-gateway","title":{"rendered":"wM-Bus Gateway"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">ESP32-based Wireless M-Bus Gateway with OLED display<\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a0df0e2aaac8&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a0df0e2aaac8\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-id=\"524\" src=\"https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010329-1024x683.jpg\" alt=\"\" class=\"wp-image-524\" srcset=\"https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010329-1024x683.jpg 1024w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010329-300x200.jpg 300w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010329-768x512.jpg 768w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010329-1536x1024.jpg 1536w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010329-2048x1365.jpg 2048w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010329-600x400.jpg 600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a0df0e2aafc2&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a0df0e2aafc2\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-id=\"525\" src=\"https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010330-1024x683.jpg\" alt=\"\" class=\"wp-image-525\" srcset=\"https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010330-1024x683.jpg 1024w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010330-300x200.jpg 300w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010330-768x512.jpg 768w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010330-1536x1024.jpg 1536w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010330-2048x1365.jpg 2048w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/P1010330-600x400.jpg 600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/figure>\n\n\n\n<p><strong>wM-Bus Gateway<\/strong> is a compact yet advanced device for receiving data from meters and sensors communicating via the Wireless M-Bus (wM-Bus) standard. The gateway operates in the 868 MHz band and is equipped with an external antenna on an SMA connector, as well as a built-in 2.4 GHz antenna for Wi-Fi and Bluetooth connectivity.<\/p>\n\n\n\n<p>Built on the <strong>ESP32<\/strong> platform, the gateway is designed for full integration with <strong>Home Assistant<\/strong>. Thanks to compatibility with <strong>ESPHome<\/strong>, the device can be quickly deployed as a home automation component, supporting local frame decoding, data presentation, and wireless communication.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\uded2 Availability<\/h3>\n\n\n\n<p>Fully assembled and ready-to-use device can be purchased:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>via <strong>Tindie<\/strong>: <a href=\"https:\/\/www.tindie.com\/products\/iotlabs\/wm-bus-gateway\/\" data-type=\"link\" data-id=\"https:\/\/www.tindie.com\/products\/iotlabs\/wm-bus-gateway\/\">https:\/\/www.tindie.com\/products\/iotlabs\/wm-bus-gateway\/<\/a><\/li>\n\n\n\n<li>directly by placing an order at <strong>support@iotlabs.pl<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd27 Key technical features:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u2705 <strong>ESP32 \u2013 <\/strong>dual-core microcontroller with<strong> Wi-Fi <\/strong>and<strong> BLE<\/strong><\/li>\n\n\n\n<li>\ud83d\udce1 <strong>868 MHz <\/strong>radio receiver with external SMA antenna<\/li>\n\n\n\n<li>\ud83c\udf10 Built-in<strong> 2.4 GHz antenna for Wi-Fi and Bluetooth<\/strong><\/li>\n\n\n\n<li>\ud83e\udde0 Supports <strong>T1 and C1 <\/strong>frames,<strong> <\/strong>compatible with the <strong>wmbusmeters <\/strong>library<\/li>\n\n\n\n<li>\ud83d\udd0c Power: <strong>5 V DC <\/strong>via<strong> microUSB<\/strong><\/li>\n\n\n\n<li>\ud83d\udcfa <strong>1.3&#8243; OLED display \u2013<\/strong> live measurements and status<\/li>\n\n\n\n<li>\ud83d\udccf <strong>Device dimensions: <\/strong>70 \u00d7 36 \u00d7 15 mm<\/li>\n\n\n\n<li>\u2699\ufe0f<strong> ESPHome compatibility<\/strong> \u2013 full integration with Home Assistant<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udce1 <strong>Bluetooth Proxy for Home Assistant<\/strong><\/h3>\n\n\n\n<p>In addition to its wM-Bus data reception capabilities, the gateway can also function as a <strong>Bluetooth Proxy<\/strong>. By enabling the appropriate option in <strong>ESPHome<\/strong>, the device can forward data from BLE sensors to <strong>Home Assistant<\/strong>, allowing you to read parameters such as temperature, humidity, or motion from distant rooms without the need for additional gateways.<\/p>\n\n\n\n<p>Bluetooth operates <strong>in parallel with wM-Bus reception<\/strong>, significantly expanding the device\u2019s functionality without compromising its primary role.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udda5 <strong>OLED Display \u2013 data always at your fingertips<\/strong><\/h3>\n\n\n\n<p>The built-in <strong>1.3&#8243; OLED display<\/strong> provides quick and convenient access to key information without the need to open an app or log into automation systems. By default, it shows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Measurements received from meters (e.g., water, heat, electricity)<\/li>\n\n\n\n<li>Current device status (Wi-Fi connection, signal strength, reception status)<\/li>\n\n\n\n<li>Most recent activity and radio transmission parameters<\/li>\n<\/ul>\n\n\n\n<p>This allows the device to operate completely <strong>autonomously<\/strong> \u2013 data is available instantly, without relying on external systems or apps.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a0df0e2abab1&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a0df0e2abab1\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-wp-class--hide=\"state.isContentHidden\" 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\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a0df0e2abed6&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a0df0e2abed6\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" 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\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a0df0e2ac2f0&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a0df0e2ac2f0\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-id=\"520\" src=\"https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/4_total_energy2-1024x683.jpg\" alt=\"\" class=\"wp-image-520\" srcset=\"https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/4_total_energy2-1024x683.jpg 1024w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/4_total_energy2-300x200.jpg 300w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/4_total_energy2-768x512.jpg 768w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/4_total_energy2-1536x1024.jpg 1536w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/4_total_energy2-2048x1365.jpg 2048w, https:\/\/iotlabs.pl\/wp-content\/uploads\/2025\/05\/4_total_energy2-600x400.jpg 600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udee0 <strong>Complete openness and flexibility \u2013 take control your way<\/strong><\/h3>\n\n\n\n<p>The device works <strong>directly with Home Assistant via ESPHome<\/strong>, enabling:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udd04 Local frame decoding and exposing data as sensors<\/li>\n\n\n\n<li>\ud83d\udce4 Publishing data to MQTT, native API, REST endpoints, or TCP\/UDP sockets<\/li>\n\n\n\n<li>\ud83d\udd27 Easy configuration via YAML or a graphical interface<\/li>\n\n\n\n<li>\ud83d\udd04 OTA firmware updates without disassembling the device<\/li>\n<\/ul>\n\n\n\n<p>Everything operates <strong>locally<\/strong> \u2013 no intermediaries or cloud required.<\/p>\n\n\n\n<p>The gateway is designed for users who value full control over their hardware. By default, it runs on <strong>ESPHome<\/strong>, but you can also:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udd04 Upload your own firmware (ESP-IDF, Arduino, MicroPython, etc.)<\/li>\n\n\n\n<li>\ud83d\udd0c Integrate the device with other automation systems<\/li>\n\n\n\n<li>\ud83c\udf10 Connect the gateway to Supla servers, including as a data source for meters<\/li>\n<\/ul>\n\n\n\n<p>With open access to the code, documentation, and the well-known ESP32 ecosystem, the gateway can be easily adapted to <strong>custom needs and protocols<\/strong>.<\/p>\n\n\n\n<p class=\"is-style-text-annotation has-large-font-size is-style-text-annotation--3\">Firmware available on: <a href=\"https:\/\/github.com\/IoTLabs-pl\/wM-Bus-Gateway\">https:\/\/github.com\/IoTLabs-pl\/wM-Bus-Gateway<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u26a1 <strong>Applications<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reading <strong>water, heat, gas, and electricity meters<\/strong><\/li>\n\n\n\n<li>Integration with utility billing systems<\/li>\n\n\n\n<li>Collecting real-time data for automation and charts<\/li>\n\n\n\n<li>Local analysis of unusual consumption (e.g., leak detection)<\/li>\n\n\n\n<li>Extending BLE coverage for Bluetooth sensors throughout the home<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udca1 <strong>Built for complete independence<\/strong><\/h3>\n\n\n\n<p>The Smart <strong>wM-Bus Gateway<\/strong> does not require external servers \u2013 it operates locally, autonomously, and fully transparently. Thanks to the powerful ESP32 processor, the device can process data on-site, buffer it, and, if needed, forward it to other automation systems. This makes it an ideal solution for users who value reliability, openness, and freedom from vendor lock-in.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Compact ESP32-based wM-Bus gateway receiving data from meters in the 868 MHz band (T1, C1). Equipped with a 1.3&#8243; OLED display, external antenna, and ESPHome support. Allows local monitoring of measurements, full integration with Home Assistant, and can also function as a Bluetooth Proxy.<\/p>\n","protected":false},"author":1,"featured_media":522,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[48,23,10,15,22,26,20,21],"class_list":["post-140","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-devices","tag-meters","tag-bluetooth-proxy","tag-esphome","tag-home-assistant","tag-oled","tag-supla","tag-wm-bus","tag-wmbusmeters"],"_links":{"self":[{"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/posts\/140","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/comments?post=140"}],"version-history":[{"count":2,"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/posts\/140\/revisions"}],"predecessor-version":[{"id":626,"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/posts\/140\/revisions\/626"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/media\/522"}],"wp:attachment":[{"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/media?parent=140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/categories?post=140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iotlabs.pl\/en\/wp-json\/wp\/v2\/tags?post=140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}