WIP scale fw

README.md

@@ -1,4 +1,4 @@
-# SekiPOS v1.6 🍫🥤
+# SekiPOS v2.0 🍫🥤
 
 A reactive POS inventory system for software engineers with a snack addiction. Features real-time UI updates, automatic product discovery via Open Food Facts, and local image caching.
 

ScaleHardware/IOT_Scale/platformio.ini

@@ -0,0 +1,16 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:waveshare_rp2040_zero]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = waveshare_rp2040_zero
+framework = arduino
+monitor_speed = 115200
+lib_archive = no

ScaleHardware/IOT_Scale/src/main.cpp

@@ -0,0 +1,89 @@
+#include <Arduino.h>
+
+const int SCLK_PIN = 18;
+const int DOUT_PIN = 19;
+const int TARE_BUTTON_PIN = 4;
+
+long offset = 0;
+float scaleFactor = 1.0; // Update this after your calibration test
+
+void setup() {
+  Serial.begin(115200);
+  
+  pinMode(SCLK_PIN, OUTPUT);
+  pinMode(DOUT_PIN, INPUT);
+  pinMode(TARE_BUTTON_PIN, INPUT_PULLUP);
+  
+  digitalWrite(SCLK_PIN, LOW);
+
+  Serial.println("Initializing SD10819 ADC...");
+  delay(500); // Wait for chip stabilization
+  calibrateZero();
+}
+
+long readADC() {
+  // 1. Wait for DRDY to go LOW
+  // Timeout added to prevent infinite loop if ADC is disconnected
+  unsigned long startWait = millis();
+  while (digitalRead(DOUT_PIN) == HIGH) {
+    if (millis() - startWait > 500) return 0; 
+  }
+
+  long value = 0;
+
+  // 2. Read 24 bits of data
+  for (int i = 0; i < 24; i++) {
+    digitalWrite(SCLK_PIN, HIGH);
+    delayMicroseconds(1); // pulse width t3 > 100ns
+    value = (value << 1) | digitalRead(DOUT_PIN);
+    digitalWrite(SCLK_PIN, LOW);
+    delayMicroseconds(1);
+  }
+
+  // 3. Configuration Pulses: 27 pulses = Channel A, 128x Gain
+  for (int i = 0; i < 3; i++) {
+    digitalWrite(SCLK_PIN, HIGH);
+    delayMicroseconds(1);
+    digitalWrite(SCLK_PIN, LOW);
+    delayMicroseconds(1);
+  }
+
+  // Handle 24-bit two's complement
+  if (value & 0x800000) {
+    value |= 0xFF000000;
+  }
+  return value;
+}
+
+void calibrateZero() {
+  Serial.println("Taring... stay still.");
+  long sum = 0;
+  for(int i = 0; i < 20; i++) {
+    sum += readADC();
+    delay(10);
+  }
+  offset = sum / 20;
+  Serial.print("New Offset: ");
+  Serial.println(offset);
+}
+
+void loop() {
+  // Check Tare Button
+  if (digitalRead(TARE_BUTTON_PIN) == LOW) {
+    calibrateZero();
+    while(digitalRead(TARE_BUTTON_PIN) == LOW); // Wait for release
+  }
+
+  // Read and Filter
+  long raw = readADC();
+  float weight = (float)(raw - offset) * scaleFactor;
+
+  // Serial Output for Debugging / Plotting
+  Serial.print("Raw:");
+  Serial.print(raw);
+  Serial.print("\tWeight:");
+  Serial.print(weight, 2);
+  Serial.println("g");
+
+  delay(100); // 10Hz sampling rate
+}

ScaleHardware/display_driver/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

ScaleHardware/display_driver/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

ScaleHardware/display_driver/include/README

@@ -0,0 +1,37 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

ScaleHardware/display_driver/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

ScaleHardware/display_driver/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html

templates/checkout.html

@@ -397,6 +397,15 @@
         handleProductScan(product);
     });
 
+    socket.on('scale_update', function (data) {
+        const weightInput = document.getElementById('weight-input');
+        const weightModal = document.getElementById('weightModal');
+
+        if (weightModal.classList.contains('show')) {
+            weightInput.value = data.grams; 
+        }
+    });
+
     function goToInventory() {
         if (missingProductData) {
             window.location.href = `/?barcode=${missingProductData.barcode}`;

templates/inventory.html

@@ -287,6 +287,13 @@ permanentemente', 'executeBulkDelete()') %}
         }
     });
 
+    socket.on('scale_update', function (data) {
+        const unitType = document.getElementById('form-unit-type').value;
+        if (unitType === 'kg') {
+            document.getElementById('form-stock').value = data.kilograms;
+        }
+    });
+
     // Replace your existing updateForm function with this one
     function updateForm(b, n, p, i, t, stock, unit) {
         dismissPrompt();