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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)

This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.

More information on the air quality monitors and kits are available here: Indoor Monitor: https://www.airgradient.com/indoor/ Outdoor Monitor: https://www.airgradient.com/outdoor/

This library supports the following sensor modules:

  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40

Important information

Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.

If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.

Help & Support

If you have any questions or problems, check out our forum.

Documentation

Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.

The following libraries have been integrated into this library for ease of use

License

CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License

About

Firmware of open-source hardware air quality monitors Changed OLED

www.airgradient.com/documentation/

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)
This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.
More information on the air quality monitors and kits are available here:
Indoor Monitor: https://www.airgradient.com/indoor/
Outdoor Monitor: https://www.airgradient.com/outdoor/
This library supports the following sensor modules:
  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40
Important information
Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.
If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.
Help & Support
If you have any questions or problems, check out our forum.
Documentation
Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.
The following libraries have been integrated into this library for ease of use
License
CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License
About
Firmware of open-source hardware air quality monitors Changed OLED
www.airgradient.com/documentation/
Resources
Readme
License
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)
This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.
More information on the air quality monitors and kits are available here:
Indoor Monitor: https://www.airgradient.com/indoor/
Outdoor Monitor: https://www.airgradient.com/outdoor/
This library supports the following sensor modules:
  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40
Important information
Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.
If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.
Help & Support
If you have any questions or problems, check out our forum.
Documentation
Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.
The following libraries have been integrated into this library for ease of use
License
CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License
About
Firmware of open-source hardware air quality monitors Changed OLED
www.airgradient.com/documentation/
Resources
Readme
License
Activity
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0 stars
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0 watching
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0 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)
This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.
More information on the air quality monitors and kits are available here:
Indoor Monitor: https://www.airgradient.com/indoor/
Outdoor Monitor: https://www.airgradient.com/outdoor/
This library supports the following sensor modules:
  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40
Important information
Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.
If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.
Help & Support
If you have any questions or problems, check out our forum.
Documentation
Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.
The following libraries have been integrated into this library for ease of use
License
CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License
About
Firmware of open-source hardware air quality monitors Changed OLED
www.airgradient.com/documentation/
Resources
Readme
License
Activity
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0 stars
Watchers
0 watching
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0 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)
This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.
More information on the air quality monitors and kits are available here:
Indoor Monitor: https://www.airgradient.com/indoor/
Outdoor Monitor: https://www.airgradient.com/outdoor/
This library supports the following sensor modules:
  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40
Important information
Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.
If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.
Help & Support
If you have any questions or problems, check out our forum.
Documentation
Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.
The following libraries have been integrated into this library for ease of use
License
CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License
About
Firmware of open-source hardware air quality monitors Changed OLED
www.airgradient.com/documentation/
Resources
Readme
License
Activity
Stars
0 stars
Watchers
0 watching
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0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)
This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.
More information on the air quality monitors and kits are available here:
Indoor Monitor: https://www.airgradient.com/indoor/
Outdoor Monitor: https://www.airgradient.com/outdoor/
This library supports the following sensor modules:
  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40
Important information
Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.
If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.
Help & Support
If you have any questions or problems, check out our forum.
Documentation
Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.
The following libraries have been integrated into this library for ease of use
License
CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License
About
Firmware of open-source hardware air quality monitors Changed OLED
www.airgradient.com/documentation/
Resources
Readme
License
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)
This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.
More information on the air quality monitors and kits are available here:
Indoor Monitor: https://www.airgradient.com/indoor/
Outdoor Monitor: https://www.airgradient.com/outdoor/
This library supports the following sensor modules:
  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40
Important information
Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.
If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.
Help & Support
If you have any questions or problems, check out our forum.
Documentation
Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.
The following libraries have been integrated into this library for ease of use
License
CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License
About
Firmware of open-source hardware air quality monitors Changed OLED
www.airgradient.com/documentation/
Resources
Readme
License
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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AirGradient Arduino Library for ESP8266 (Wemos D1 MINI) and ESP32 (ESP32-C3 Mini)
This is the code for the AirGradient open-source indoor and outdoor air quality monitors with ESP8266 / ESP32-C3 Microcontrollers.
More information on the air quality monitors and kits are available here:
Indoor Monitor: https://www.airgradient.com/indoor/
Outdoor Monitor: https://www.airgradient.com/outdoor/
This library supports the following sensor modules:
  • Plantower PMS5003
  • Plantower PMS5003T
  • SenseAir S8
  • Sensirion SGP41
  • Sensirion SHT40
Important information
Make sure you have exactly the versions of libraries and boards installed as described in the comment section of the example files.
If you have an older version of the AirGradient PCB not mentioned in the example files, please downgrade this library to version 2.4.15 to support these legacy boards.
Help & Support
If you have any questions or problems, check out our forum.
Documentation
Local server API documentation is available in /docs/local-server.md and AirGradient server API on https://api.airgradient.com/public/docs/api/v1/.
The following libraries have been integrated into this library for ease of use
License
CC BY-SA 4.0 Attribution-ShareAlike 4.0 International License
About
Firmware of open-source hardware air quality monitors Changed OLED
www.airgradient.com/documentation/
Resources
Readme
License
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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