working simple ec-meter
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commit
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.pio
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.vscode/.browse.c_cpp.db*
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.vscode/c_cpp_properties.json
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.vscode/launch.json
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.vscode/ipch
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.pioenvs
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.piolibdeps
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.clang_complete
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.gcc-flags.json
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{
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// See http://go.microsoft.com/fwlink/?LinkId=827846
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// for the documentation about the extensions.json format
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"recommendations": [
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"platformio.platformio-ide"
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],
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"unwantedRecommendations": [
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"ms-vscode.cpptools-extension-pack"
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]
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}
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{
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"cmake.configureOnOpen": false
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}
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# EC-Meter for ESP32
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Circuit from: https://publiclab.org/notes/bhickman/05-09-2016/conductivity-and-temperature-meter
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This directory is intended for project header files.
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A header file is a file containing C declarations and macro definitions
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to be shared between several project source files. You request the use of a
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header file in your project source file (C, C++, etc) located in `src` folder
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by including it, with the C preprocessing directive `#include'.
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```src/main.c
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#include "header.h"
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int main (void)
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{
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...
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}
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```
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Including a header file produces the same results as copying the header file
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into each source file that needs it. Such copying would be time-consuming
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and error-prone. With a header file, the related declarations appear
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in only one place. If they need to be changed, they can be changed in one
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place, and programs that include the header file will automatically use the
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new version when next recompiled. The header file eliminates the labor of
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finding and changing all the copies as well as the risk that a failure to
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find one copy will result in inconsistencies within a program.
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In C, the usual convention is to give header files names that end with `.h'.
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It is most portable to use only letters, digits, dashes, and underscores in
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header file names, and at most one dot.
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Read more about using header files in official GCC documentation:
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* Include Syntax
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* Include Operation
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* Once-Only Headers
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* Computed Includes
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https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
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@ -0,0 +1,46 @@
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This directory is intended for project specific (private) libraries.
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PlatformIO will compile them to static libraries and link into executable file.
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The source code of each library should be placed in a an own separate directory
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("lib/your_library_name/[here are source files]").
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For example, see a structure of the following two libraries `Foo` and `Bar`:
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|--lib
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| |
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| |--Bar
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| | |--docs
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| | |--examples
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| | |--src
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| | |- Bar.c
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| | |- Bar.h
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| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
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| |
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| |--Foo
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| | |- Foo.c
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| | |- Foo.h
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| |
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| |- README --> THIS FILE
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|
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|- platformio.ini
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|--src
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|- main.c
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and a contents of `src/main.c`:
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```
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#include <Foo.h>
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#include <Bar.h>
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int main (void)
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{
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...
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}
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```
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PlatformIO Library Dependency Finder will find automatically dependent
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libraries scanning project source files.
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More information about PlatformIO Library Dependency Finder
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- https://docs.platformio.org/page/librarymanager/ldf.html
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; PlatformIO Project Configuration File
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;
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; Build options: build flags, source filter
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; Upload options: custom upload port, speed and extra flags
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; Library options: dependencies, extra library storages
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; Advanced options: extra scripting
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;
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; Please visit documentation for the other options and examples
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; https://docs.platformio.org/page/projectconf.html
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[env:esp32doit-devkit-v1]
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platform = espressif32
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board = esp32doit-devkit-v1
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framework = arduino
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monitor_speed = 115200
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#include <Arduino.h>
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#define EC_PIN_ADC 4
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#define EC_PIN_FREQ 5
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#define EC_PWM_CH 0
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#define EC_RESOLUTION 8
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#define EC_FREQUENCY 5000
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#define EC_ARRAY_SIZE 1024
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uint16_t ec_array[EC_ARRAY_SIZE];
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uint16_t ec_array_pos=0;
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unsigned long ec_last_read=0;
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#define EC_READ_INTERVAL 1
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unsigned long last_print=0;
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float getMean(uint16_t* parray);
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uint16_t getMin(uint16_t *parray);
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uint16_t getMax(uint16_t *parray);
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void setup() {
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Serial.begin(115200);
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pinMode(EC_PIN_ADC,INPUT);
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ledcSetup(EC_PWM_CH, EC_FREQUENCY, EC_RESOLUTION);
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ledcAttachPin(EC_PIN_FREQ, EC_PWM_CH);
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ledcWrite(EC_PWM_CH, 127);
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}
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void loop() {
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unsigned long loopmillis=millis();
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bool flag_print=false;
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if (loopmillis>ec_last_read+EC_READ_INTERVAL) {
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ec_last_read=loopmillis;
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ec_array_pos++;
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flag_print= ec_array_pos==EC_ARRAY_SIZE;
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ec_array_pos%=EC_ARRAY_SIZE;
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ec_array[ec_array_pos]=analogRead(EC_PIN_ADC);
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//Serial.print(ec_array[ec_array_pos]); Serial.print(" ");
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}
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//if (flag_print) {
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if (loopmillis>last_print+250) {
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last_print=loopmillis;
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Serial.print(getMean(ec_array),3);
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Serial.print("\t"); Serial.print(getMax(ec_array) - getMin(ec_array));
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Serial.println();
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}
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}
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float getMean(uint16_t *parray) {
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double mean=0;
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for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
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mean+=parray[i];
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}
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return mean/EC_ARRAY_SIZE;
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}
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uint16_t getMin(uint16_t *parray) {
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uint16_t min=65535;
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for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
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if (parray[i]<min) {
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min=parray[i];
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}
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}
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return min;
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}
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uint16_t getMax(uint16_t *parray) {
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uint16_t max=0;
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for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
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if (parray[i]>max) {
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max=parray[i];
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}
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}
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return max;
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}
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