NEW: first scratch code for testing the Piezzo sensor

.gitignore

+.pioenvs

Makefile

+all: build serial
+
+build:
+	platformio run -e uno -t upload
+
+serial:
+	picocom -b 9600 /dev/ttyACM0
+
+install-picocom:
+	sudo apt-get install picocom
+
+install-platformio:
+	sudo python -c "$(curl -fsSL https://raw.githubusercontent.com/platformio/platformio/master/scripts/get-platformio.py)"
+
+clean:
+	rm -rf .pioenvs/

lib/readme.txt

+
+This directory is intended for the project specific (private) libraries.
+PlatformIO will compile them to static libraries and link to executable file.
+
+The source code of each library should be placed in separate directory, like
+"lib/private_lib/[here are source files]".
+
+For example, see how can be organized `Foo` and `Bar` libraries:
+
+|--lib
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |- readme.txt --> THIS FILE
+|- platformio.ini
+|--src
+   |- main.c
+
+Then in `src/main.c` you should use:
+
+#include <Foo.h>
+#include <Bar.h>
+
+// rest H/C/CPP code
+
+PlatformIO will find your libraries automatically, configure preprocessor's
+include paths and build them.
+
+See additional options for PlatformIO Library Dependency Finder `lib_*`:
+
+http://docs.platformio.org/en/latest/projectconf.html#lib-install
+

platformio.ini

+#
+# Project Configuration File
+#
+# A detailed documentation with the EXAMPLES is located here:
+# http://docs.platformio.org/en/latest/projectconf.html
+#
+
+# A sign `#` at the beginning of the line indicates a comment
+# Comment lines are ignored.
+
+# Simple and base environment
+# [env:mybaseenv]
+# platform = %INSTALLED_PLATFORM_NAME_HERE%
+# framework =
+# board =
+#
+# Automatic targets - enable auto-uploading
+# targets = upload
+
+[env:uno]
+platform = atmelavr
+framework = arduino
+board = uno

src/piezzo-test.ino

+#define  YELLOW_LED_PIN   8
+#define  RED_LED_PIN      13
+ 
+#define  RED_THRESHOLD         50
+
+#define  YELLOW_MIN_THRESHOLD  6
+#define  YELLOW_MAX_THRESHOLD  10
+
+
+int pv;  // piezzo value 
+
+unsigned long previousMillis = 0;
+int led_state=LOW;
+
+void setup()
+{
+    Serial.begin(9600);
+    pinMode(RED_LED_PIN, OUTPUT);
+    pinMode(YELLOW_LED_PIN, OUTPUT);
+}
+
+void loop() 
+{
+    pv = analogRead(0);    
+
+    if (pv >= YELLOW_MIN_THRESHOLD && pv <= YELLOW_MAX_THRESHOLD)
+    {
+        digitalWrite(YELLOW_LED_PIN, HIGH);
+        Serial.println(pv);
+    }    
+    else
+    {
+        digitalWrite(YELLOW_LED_PIN, LOW);
+    }
+
+    unsigned long currentMillis = millis();
+    
+    if (currentMillis - previousMillis >= 500)
+    {
+        previousMillis = currentMillis;
+        led_state = (led_state == LOW) ? HIGH : LOW;
+        digitalWrite(RED_LED_PIN, led_state);
+    }
+
+}