numpad kinda working

extensions/platformio/IOT_Scale/platformio.ini

@@ -13,5 +13,3 @@ platform = https://github.com/maxgerhardt/platform-raspberrypi.git
 board = waveshare_rp2040_zero
 framework = arduino
 monitor_speed = 115200
-lib_archive = no
-lib_deps = bogde/HX711@^0.7.5

extensions/platformio/display_driver/platformio.ini

@@ -13,5 +13,3 @@ platform = https://github.com/maxgerhardt/platform-raspberrypi.git
 board = waveshare_rp2040_zero
 framework = arduino
 monitor_speed = 115200
-lib_archive = no
-lib_deps = bogde/HX711@^0.7.5

extensions/platformio/keypad_read/.gitignore

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

extensions/platformio/keypad_read/.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"
+    ]
+}

extensions/platformio/keypad_read/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

extensions/platformio/keypad_read/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

extensions/platformio/keypad_read/platformio.ini

@@ -0,0 +1,15 @@
+; 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

extensions/platformio/keypad_read/src/main.cpp

@@ -0,0 +1,48 @@
+#include <Arduino.h>
+
+const int BUZZER_PIN = 6;
+const int allPins[] = {0, 1, 2, 3, 4, 5, 7}; 
+const int numPins = 7;
+
+unsigned long lastDebounceTime = 0;
+const int debounceDelay = 250; 
+
+void setup() {
+  Serial.begin(115200);
+  for (int i = 0; i < numPins; i++) {
+    pinMode(allPins[i], INPUT_PULLUP);
+  }
+}
+
+void loop() {
+  // Only scan if we aren't in the middle of a "hit" lockout
+  if (millis() - lastDebounceTime < debounceDelay) return;
+
+  for (int s = 0; s < numPins; s++) {
+    int strobe = allPins[s];
+
+    pinMode(strobe, OUTPUT);
+    digitalWrite(strobe, LOW);
+    delayMicroseconds(100); // Slightly longer for stability
+
+    for (int i = 0; i < numPins; i++) {
+      int target = allPins[i];
+      if (target == strobe) continue;
+
+      if (digitalRead(target) == LOW) {
+        // WE FOUND ONE!
+        Serial.print("SINK:");
+        Serial.print(strobe);
+        Serial.print(" READ:");
+        Serial.println(target);
+
+        //tone(BUZZER_PIN, 2000, 50);
+        lastDebounceTime = millis();
+        
+        pinMode(strobe, INPUT_PULLUP);
+        return; // Jump out of the whole loop to reset the lockout
+      }
+    }
+    pinMode(strobe, INPUT_PULLUP);
+  }
+}

extensions/platformio/keypad_read/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