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Raspberry Pi Pico W flowSensor and TDS Meter

Marine water flow sensor and meter

Hardware used

  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)

Features

  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes

Environment

  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.

Build

  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).

Test

It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.

The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.

It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.

It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.

To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).

To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.

External dependencies

Screenshot

Check THIS out




The main components




About

Marine water flow sensor and TDS meter

Topics

digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp

Resources

Readme
Activity

Stars

5 stars

Watchers

1 watching

Forks

0 forks
Report repository

Releases

Packages

Contributors

Languages

, '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" + '

Skip to content
BranchesTags
Repository files navigation
Raspberry Pi Pico W flowSensor and TDS Meter
Marine water flow sensor and meter
Hardware used
  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)
Features
  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes
Environment
  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.
Build
  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).
Test
It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.
The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.
It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.
It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.
To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).
To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.
External dependencies
Screenshot
Check THIS out



The main components



About
Marine water flow sensor and TDS meter
Topics
digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp
Resources
Readme
Activity
Stars
5 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Raspberry Pi Pico W flowSensor and TDS Meter
Marine water flow sensor and meter
Hardware used
  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)
Features
  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes
Environment
  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.
Build
  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).
Test
It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.
The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.
It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.
It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.
To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).
To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.
External dependencies
Screenshot
Check THIS out



The main components



About
Marine water flow sensor and TDS meter
Topics
digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp
Resources
Readme
Activity
Stars
5 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Raspberry Pi Pico W flowSensor and TDS Meter
Marine water flow sensor and meter
Hardware used
  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)
Features
  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes
Environment
  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.
Build
  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).
Test
It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.
The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.
It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.
It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.
To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).
To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.
External dependencies
Screenshot
Check THIS out



The main components



About
Marine water flow sensor and TDS meter
Topics
digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp
Resources
Readme
Activity
Stars
5 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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" + '

Skip to content
BranchesTags
Repository files navigation
Raspberry Pi Pico W flowSensor and TDS Meter
Marine water flow sensor and meter
Hardware used
  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)
Features
  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes
Environment
  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.
Build
  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).
Test
It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.
The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.
It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.
It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.
To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).
To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.
External dependencies
Screenshot
Check THIS out



The main components



About
Marine water flow sensor and TDS meter
Topics
digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp
Resources
Readme
Activity
Stars
5 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Raspberry Pi Pico W flowSensor and TDS Meter
Marine water flow sensor and meter
Hardware used
  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)
Features
  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes
Environment
  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.
Build
  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).
Test
It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.
The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.
It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.
It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.
To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).
To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.
External dependencies
Screenshot
Check THIS out



The main components



About
Marine water flow sensor and TDS meter
Topics
digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp
Resources
Readme
Activity
Stars
5 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, '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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Raspberry Pi Pico W flowSensor and TDS Meter
Marine water flow sensor and meter
Hardware used
  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)
Features
  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes
Environment
  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.
Build
  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).
Test
It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.
The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.
It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.
It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.
To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).
To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.
External dependencies
Screenshot
Check THIS out



The main components



About
Marine water flow sensor and TDS meter
Topics
digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp
Resources
Readme
Activity
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Watchers
1 watching
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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); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
Raspberry Pi Pico W flowSensor and TDS Meter
Marine water flow sensor and meter
Hardware used
  • Raspberry Pi Pico W
  • Waveshare Precision RTC module
  • Waveshare 1.14" color display
  • A water flow sensor
  • A TDS sensor Module (Gravity TDS module)
  • A Conductivity probe (Hanna HI7634-00)
Features
  • Monitor filter elapse time
  • Monitor total flow through filter
  • Monitor volume / time
  • Monitor TDS water Quality and water temperature
  • Real-time trim of TDS probe K-value from web page
  • Real-time trim of Q value for the flow sensor from web page
  • Live graphical dashboard
  • Near end of filter life alert
  • End of filter life alert
  • Automatic data memorised in flash
  • WiFi connectivity, NTP and HTTPD functions
  • WiFi connectivity management for AP and STA modes
Environment
  • Linux Mint (Debian/Ubuntu) platform for development
  • The folder structure of this application follows the Waveshare SDK "Pico_code/c" structure. The free Waveshare libs are included here.
Build
  • Install Pico SDK (if not installed already)
  • Install pico_extras (if not installed previousy) using the script preparePico-extras.sh
  • Alter the default WiFi credentials in ./examples/water-ctrl.h
  • mkdir build; cd build; PICO_BOARD=pico_w cmake ..
  • make fsdata (make embedded file system to hold html index files etc. Run each time html files has been changed)
  • make (to produce the executable main.uf2)
  • make install will install the main.uf2 into /media/(your logname)/RPI-RP2 assuming here that this folder is automounted when the Pico is set to "BOOTSEL" mode.
  • The hostname of this Pico W is set to DigiFlow, so it should be possible to surf in to the device referenced that name (+plus your domain name).
Test
It is possible to test this app on a bare Pico W without the extra hats and just browse in to this device home page. In such case, disable the RTC define in the water-ctrl.h to get sane date timestamps.
The first time this app is installed on a fresh Pico W, the pico will enter AP (Access Point) mode and from there it can be configured as a ordinary (STA) wifi node. The passord for AP mode is "digiflow" and the GW I.P is 192.168.4.1 to point your browsser to.
It is also possibe to switch between these modes by using the display (GPIO) buttons. The AP mode is considered a "rescue" mode if the pico is somehow lost in the wifi universe.
It is possible to simulate a flow sensor by applying a 2.5 Volt square wave to GPIO(5) at a frequency between 1 to 110 Hz.
To simulate a TDS Water Quality Sensor, regulate with a pot a voltage between 0 to 3.3v at GPIO(26).
To folow the console output, attach a seral to USB dongle to the Picos' No 1 (output) pin.
External dependencies
Screenshot
Check THIS out



The main components



About
Marine water flow sensor and TDS meter
Topics
digiflowflowmeterflowsensormarinepico-wraspberry-pitdstdsmeterwater-qualitywater-temp
Resources
Readme
Activity
Stars
5 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages