forked from github/ebk_co2ampel
nilo
12 months ago
9 changed files with 229 additions and 110 deletions
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5.gitignore
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7.vscode/extensions.json
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29README.md
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82ebk_co2ampel/ebk_co2ampel.ino
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39include/README
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46lib/README
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19platformio.ini
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101src/ebk_co2ampel.cpp
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11test/README
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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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{ |
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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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} |
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#include <Arduino.h>
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#include "MHZ19.h"
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#include "SSD1306Wire.h"
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#include <Adafruit_NeoPixel.h>
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#define RX_PIN 16
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#define TX_PIN 17
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#define BAUDRATE 9600
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MHZ19 myMHZ19; |
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HardwareSerial mySerial(1); |
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SSD1306Wire display(0x3c, 21, 22); |
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// When we setup the NeoPixel library, we tell it how many pixels, and which pin to use to send signals.
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// Note that for older NeoPixel strips you might need to change the third parameter--see the strandtest
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Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, 4, NEO_GRB + NEO_KHZ800); |
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unsigned long getDataTimer = 0; |
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int lastvals[120]; |
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int dheight; |
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void setup() |
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{ |
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Serial.begin(9600); |
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mySerial.begin(BAUDRATE, SERIAL_8N1, RX_PIN, TX_PIN); |
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myMHZ19.begin(mySerial); |
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display.init(); |
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display.setContrast(255); |
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delay(1000); |
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display.clear(); |
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dheight = display.getHeight(); |
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myMHZ19.autoCalibration(); |
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for (int x; x <= 119; x = x + 1) { |
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lastvals[x] = -1; |
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} |
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pixels.begin(); // This initializes the NeoPixel library.
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pixels.setPixelColor(0, pixels.Color(255,0,0)); // Moderately bright green color.
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pixels.show(); |
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} |
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int calc_vpos_for_co2(int co2val, int display_height) { |
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return display_height - int((float(display_height) / 3000) * co2val); |
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} |
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void loop() |
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{ |
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if (millis() - getDataTimer >= 5000) |
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{ |
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int CO2; |
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CO2 = myMHZ19.getCO2(); |
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for (int x = 1; x <= 119; x = x + 1) { |
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lastvals[x - 1] = lastvals[x]; |
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} |
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lastvals[119] = CO2; |
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display.clear(); |
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for (int h = 1; h < 120; h = h + 1) { |
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int curval = lastvals[h]; |
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if (curval > 0) { |
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int vpos = calc_vpos_for_co2(lastvals[h], dheight); |
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int vpos_last = calc_vpos_for_co2(lastvals[h - 1], dheight); |
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display.drawLine(h - 1, vpos_last, h, vpos); |
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} |
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} |
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display.setLogBuffer(5, 30); |
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display.println(CO2); |
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display.drawLogBuffer(0, 0); |
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display.display(); |
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Serial.print("CO2 (ppm): "); |
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Serial.println(CO2); |
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getDataTimer = millis(); |
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} |
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} |
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|
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This directory is intended for project header files. |
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|
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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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|
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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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|
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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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|
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Read more about using header files in official GCC documentation: |
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|
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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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|
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https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html |
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|
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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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|
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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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|
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For example, see a structure of the following two libraries `Foo` and `Bar`: |
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|
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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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|
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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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``` |
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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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|
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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:esp32dev] |
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platform = espressif32 |
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board = esp32dev |
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framework = arduino |
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upload_port = /dev/ttyUSB0 |
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lib_deps = |
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adafruit/Adafruit NeoPixel@^1.6.0 |
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wifwaf/MH-Z19@^1.5.2 |
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squix78/ESP8266_SSD1306@^4.1.0 |
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#include <Arduino.h>
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#include "MHZ19.h"
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#include "SSD1306Wire.h"
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#include <Adafruit_NeoPixel.h>
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// Maximum CO² levels for green and yellow, everything above is considered red.
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#define GREEN_CO2 800
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#define YELLOW_CO2 1500
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// Measurement interval in miliseconds
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#define INTERVAL 10000
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// Pins for MH-Z19
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#define RX_PIN 16
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#define TX_PIN 17
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// Pins for SD1306
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#define SDA_PIN 21
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#define SCL_PIN 22
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// Pin for LED
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#define LED_PIN 4
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MHZ19 myMHZ19; |
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HardwareSerial mySerial(1); |
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SSD1306Wire display(0x3c, SDA_PIN, SCL_PIN); |
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Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, LED_PIN, NEO_RGB + NEO_KHZ400); |
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unsigned long getDataTimer = 0; |
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int lastvals[120]; |
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int dheight; |
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void setup() { |
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Serial.begin(9600); |
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mySerial.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN); |
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myMHZ19.begin(mySerial); |
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display.init(); |
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display.setContrast(255); |
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delay(1000); |
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display.clear(); |
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dheight = display.getHeight(); |
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myMHZ19.autoCalibration(); |
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// Fill array of last measurements with -1
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for (int x = 0; x <= 119; x = x + 1) { |
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lastvals[x] = -1; |
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} |
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pixels.begin(); |
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pixels.setPixelColor(0, 30,0,0); |
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pixels.show(); |
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} |
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int calc_vpos_for_co2(int co2val, int display_height) { |
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return display_height - int((float(display_height) / 3000) * co2val); |
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} |
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void set_led_color(int co2) { |
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if (co2 < GREEN_CO2) { |
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// Green
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pixels.setPixelColor(0, 30,0,0); |
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} else if (co2 < YELLOW_CO2) { |
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// Yellow
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pixels.setPixelColor(0, 40,40, 0); |
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} else { |
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// Red
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pixels.setPixelColor(0, 0,90,0); |
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} |
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pixels.show(); |
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} |
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void loop() { |
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if (millis() - getDataTimer >= INTERVAL) { |
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// Get new CO² value.
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int CO2 = myMHZ19.getCO2(); |
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// Shift entries in array back one position.
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for (int x = 1; x <= 119; x = x + 1) { |
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lastvals[x - 1] = lastvals[x]; |
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} |
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// Add new measurement at the end.
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lastvals[119] = CO2; |
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// Clear display and redraw whole graph.
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display.clear(); |
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for (int h = 1; h < 120; h = h + 1) { |
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int curval = lastvals[h]; |
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if (curval > 0) { |
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int vpos = calc_vpos_for_co2(lastvals[h], dheight); |
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int vpos_last = calc_vpos_for_co2(lastvals[h - 1], dheight); |
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display.drawLine(h - 1, vpos_last, h, vpos); |
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} |
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} |
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// Set LED color and print value on display
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set_led_color(CO2); |
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display.setLogBuffer(1, 30); |
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display.println(CO2); |
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display.drawLogBuffer(0, 0); |
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display.display(); |
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// Debug output
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Serial.print("CO2 (ppm): "); |
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Serial.println(CO2); |
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getDataTimer = millis(); |
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} |
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} |
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|
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This directory is intended for PlatformIO Unit Testing and project tests. |
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|
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Unit Testing is a software testing method by which individual units of |
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source code, sets of one or more MCU program modules together with associated |
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control data, usage procedures, and operating procedures, are tested to |
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determine whether they are fit for use. Unit testing finds problems early |
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in the development cycle. |
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|
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More information about PlatformIO Unit Testing: |
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- https://docs.platformio.org/page/plus/unit-testing.html |
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