Jens Schmidt / MicrobitIAQ

uses BBC micro:bit to measure and display indoor air quality using Bosch BME680 and/or Sensirion SGP30

Dependencies:   microbit

uses Bosch BME680 and/or Sensirion SGP30 sensors to measure indor air quality

sensors should be connected to BBC micro:bit using i2c

commands are received and data is being sent using uBit / nordic radio protocol

display ---

last line always indicates: - first dot: bme680 detected - second dot: sgp30 detected - third dot: sgp 30 setting humidity/temperature - fourth dor: sgp30 measuring - fith dot: bme680 measuring

the detect dots should be in a stable state (not blinking) the measuring dots should be blinking (constant light means: measurement failed)

if only one bme680 is present: - first 3 lines indicate gas resistence (air quality / more dots == worse quality) - fourth line indicates humidity level

if only sgp30 is present: - first two lines indicate SGP30 VOC level - third and fourth line indicate sgp30 CO2 level

if both sensors are present: - first line indicates SGP30 VOC level - second line line indicates sgp30 CO2 level - third line indicates bme680 gas resistence (air quality) - fourth line indicates bme 680 humidity level

buttons - B display state, switches betweeen - full bright - low light - display off

AB reset sgp30 baseline in non volatile storage

data logging -- during measurements the minimum and mximum values for each measured value (temperature, air pressure, humidity,gas resistance, VOC, CO2) are being stored in non volatile storage those (and the last measurement results) are being shown when btn A has been pressed

Diff: main.cpp

Revision:
49:bbb506b58e6e
Parent:
48:52cad865a84f
Child:
50:63442fd5e709
diff -r 52cad865a84f -r bbb506b58e6e main.cpp
--- a/main.cpp	Thu Mar 21 13:09:58 2019 +0000
+++ b/main.cpp	Sun Jan 16 15:42:13 2022 +0000
@@ -28,6 +28,7 @@
 #include "bme680.h"
 #include "sgp30.h"
 #include "IaqNonVolatileStore.h"
+#include "JavaScriptRadio.h"
 
 #include "physics.h"
 
@@ -36,16 +37,25 @@
 
 #include "AppSpecificTestrunner.h"
 
+#define RADIO_GROUP 14
+#define RADIO_DELAY 800
+
+#define CMD_SET_BASELINE            "baseline "
+#define CMD_MEASURE_AND_PUBLISH     "IAQ"
+#define CMD_RESET_TEMP_HUM_CO2      "resetTmpHum"
+#define CMD_STORE_CURRENT_BASELINE  "updateBaseline"
+
 MicroBit uBit;
 Bme680* bme680 = NULL;
 struct bme680_field_data* bme680Data = NULL;
 Sgp30* sgp30 = NULL;
 I2cCallbacks* callbacks = NULL;
 IaqNonVolatileStore* nvStore = NULL;
+JavaScriptRadio* radio = NULL;
 
 bool cancelMeasureLoops = false;
 int runningLoops = 0;
-int displayState = 0;
+int displayBrightness = 255;
 
 void waitForLooppsToFinish() {
     cancelMeasureLoops=true;
@@ -55,6 +65,7 @@
     cancelMeasureLoops = false;
 }
 
+
 void displayPixels(int ystart, int pixels, int maxpixels) {
     int y = ystart;
     for (int i=0; i+((y-ystart)*5)<maxpixels; ++i) {
@@ -63,7 +74,7 @@
             i=0;
         }
         int pixelsused = i+((y-ystart)*5);
-        uBit.display.image.setPixelValue(i, y, pixelsused<pixels? 255 : 0);
+        uBit.display.image.setPixelValue(i, y, pixelsused<pixels? displayBrightness : 0);
     }
 }
 
@@ -83,18 +94,18 @@
 void measureAndDisplayBme680() {
     if (bme680!=NULL) {
         // measuring
-        uBit.display.image.setPixelValue(4, 4, 255);
+        uBit.display.image.setPixelValue(4, 4, displayBrightness);
         if (measureBme680()==MICROBIT_OK) {
-            nvStore->updateGas(bme680Data->gas_resistance, bme680Data->humidity);
+            nvStore->updateGas(bme680Data->gas_resistance);
             nvStore->updateTemp(bme680Data->temperature);
             nvStore->updatePress(bme680Data->pressure);
             nvStore->updateHumidity(bme680Data->humidity);
             
-            const uint32_t gasMax = nvStore->getGasMax(bme680Data->humidity);
+            const uint32_t gasMax = nvStore->getGasMax();
             
             // status (last line: 0 sensor found, 2, stray signals, 4, measuring)
-            uBit.display.image.setPixelValue(0, 4, 255);
-            uBit.display.image.setPixelValue(2, 4, nvStore->strayData() || gasMax < bme680Data->gas_resistance ? 255 : 0);
+            uBit.display.image.setPixelValue(0, 4, displayBrightness);
+            uBit.display.image.setPixelValue(2, 4, nvStore->strayData() || gasMax < bme680Data->gas_resistance ? displayBrightness : 0);
             // will be set below uBit.display.image.setPixelValue(4, 4, 0);
             
             // if sgp 30 exists, we have less room fpr bme680 resukts
@@ -116,6 +127,16 @@
     }
 }
 
+bool checkAndStoreSgp30Baseline() {
+    uint16_t eco2_base;
+    uint16_t tvoc_base;
+    bool baseLineOK = sgp30->getIAQBaseline(&eco2_base, &tvoc_base);
+    if (baseLineOK) {
+        nvStore->storeIAQBaseline(eco2_base, tvoc_base);
+    }
+    return baseLineOK;
+}
+
 void measureAndDisplaySgp30() {
     if (sgp30!=NULL) {
         int sgpMaxPixels = 10;
@@ -123,16 +144,16 @@
         if (bme680!=NULL) {
             sgpMaxPixels = 5;
             secondLineStart = 1;
-            uBit.display.image.setPixelValue(3, 4, 255);
+            uBit.display.image.setPixelValue(3, 4, displayBrightness);
             if (sgp30->setHumidity(bme680Data->humidity, bme680Data->temperature)) {
                 uBit.display.image.setPixelValue(3, 4, 0);
             }
             uBit.sleep(10);
         }
-        uBit.display.image.setPixelValue(3, 4, 255);
+        uBit.display.image.setPixelValue(3, 4, displayBrightness);
         bool measureOK = sgp30->IAQmeasure();
         if (measureOK) {
-            uBit.display.image.setPixelValue(1, 4, 255);
+            uBit.display.image.setPixelValue(1, 4, displayBrightness);
             uBit.display.image.setPixelValue(3, 4, 0);
             
             nvStore->updateVoc(sgp30->TVOC);
@@ -147,6 +168,7 @@
     }
 }
 
+
 void bmeMeasureLoop() { 
     if (bme680!=NULL) {
         ++runningLoops;
@@ -180,15 +202,13 @@
     create_fiber(bmeMeasureLoop);
 }
 
+
 void init680(){
     if (bme680!=NULL){
         delete bme680;
     }
     
-    uint32_t gasMax = nvStore->getGasMax(0);
-    if (gasMax>0) {
-        uBit.display.scroll((int)gasMax);
-    }
+    uint32_t gasMax = nvStore->getGasMax();
     
     bme680 = new Bme680(callbacks);
     int code = bme680->init();
@@ -207,8 +227,11 @@
         delete bme680Data;
         bme680Data = NULL;
         uBit.display.scroll(code);
+        ManagedString send("no BME680 " + code);
+        radio -> sendToMakeCodeDevices(send);
     } else {
-        uBit.display.image.setPixelValue(0, 4, 255);
+        uBit.display.image.setPixelValue(0, 4, displayBrightness);
+        radio -> sendToMakeCodeDevices("BME680 up");
     }
 }
 
@@ -216,70 +239,179 @@
     if (sgp30!=NULL){
         delete sgp30;
     }
+    
     sgp30 = new Sgp30(callbacks);
     if (sgp30->test() && sgp30->begin()) {
-        uBit.display.image.setPixelValue(1, 4, 255);
+        uBit.display.image.setPixelValue(1, 4, displayBrightness);
+        radio -> sendToMakeCodeDevices("sgp30 up");
+        
+        uint16_t eco2_base;
+        uint16_t tvoc_base;
+        if (nvStore->getIAQBaseline(&eco2_base, &tvoc_base)) {
+            sgp30->setIAQBaseline(eco2_base, tvoc_base);
+            uBit.display.image.setPixelValue(2, 4, displayBrightness);
+            
+            uBit.sleep(RADIO_DELAY);
+            radio -> sendToMakeCodeDevices("sgp30 basline: eco:");
+            uBit.sleep(RADIO_DELAY);
+            radio -> sendToMakeCodeDevices(eco2_base);
+            uBit.sleep(RADIO_DELAY);
+            radio -> sendToMakeCodeDevices(" co2:");
+            uBit.sleep(RADIO_DELAY);
+            radio -> sendToMakeCodeDevices(tvoc_base);
+        } else {
+            uBit.sleep(RADIO_DELAY);
+            radio -> sendToMakeCodeDevices("sgp30 no baseline");
+        }
     } else  {
+        radio -> sendToMakeCodeDevices("no sgp30");
         delete sgp30;
         sgp30 = NULL;
     }
 }
 
+void sgp30SetBaseline(ManagedString message){
+    // sgp30->setIAQBaseline(eco2_base, tvoc_base);
+    if (! (message.substring(0, 9) == CMD_SET_BASELINE)) {
+        radio -> sendToMakeCodeDevices("not setting baseline");
+        uBit.sleep(RADIO_DELAY);
+        radio -> sendToMakeCodeDevices(message);
+        return;
+    }
+    
+    uint16_t eco2_base = 0;
+    uint16_t tvoc_base = 0;
+    
+    int messageLength = message.length();
+    
+    int i = 13;
+    char c = ' ';
+    
+    do{
+        c = message.charAt(i);
+        
+        if (c<'0' || c>'9') {
+            eco2_base*=10;
+            eco2_base+= c-'0';
+        }
+    } while (++i < messageLength && c != ' ');
+    
+    if (eco2_base!=0 && c==' ') {
+        do{
+            c = message.charAt(i);
+            
+            if (c<'0' || c>'9') {
+                tvoc_base*=10;
+                tvoc_base+= c-'0';
+            }
+        } while (++i < messageLength);
+    }
+    
+    if (tvoc_base != 0){
+       sgp30->setIAQBaseline(eco2_base, tvoc_base);
+       nvStore->storeIAQBaseline(eco2_base, tvoc_base);
+       
+       radio -> sendToMakeCodeDevices("baseline set and stored");
+        uBit.sleep(RADIO_DELAY);
+        radio -> sendToMakeCodeDevices(message);
+        uBit.sleep(RADIO_DELAY);
+        radio -> sendToMakeCodeDevices(eco2_base);
+        uBit.sleep(RADIO_DELAY);
+        radio -> sendToMakeCodeDevices(tvoc_base);
+    } else {
+        radio -> sendToMakeCodeDevices("not setting baseline");
+        uBit.sleep(RADIO_DELAY);
+        radio -> sendToMakeCodeDevices(message);
+        uBit.sleep(RADIO_DELAY);
+        radio -> sendToMakeCodeDevices(eco2_base);
+        uBit.sleep(RADIO_DELAY);
+        radio -> sendToMakeCodeDevices(tvoc_base);
+    }
+    
+}
+
 void initSensors() {
     waitForLooppsToFinish();
     init680();
     initSgp30();    
 }
 
-void displayValuesTxt() {
+void publishResults() {
     waitForLooppsToFinish();
-    if (bme680Data!=NULL) {
-        uBit.display.scroll("g");
-        const int currentGas = (int)bme680Data->gas_resistance;
-        uBit.display.scroll(currentGas);
-        uBit.display.scroll("+");
-        const int highGas = (int)nvStore->getGasMax(bme680Data->humidity);
-        uBit.display.scroll(highGas);
-        if (nvStore->strayData() || highGas < currentGas) {
-            for (int i=0; i<IaqNonVolatileStore::AVERAGE_BUFFER_SIZE; ++i) {
-                uBit.display.scroll(":");
-                uBit.display.scroll((int)nvStore->debugInfo()[i]);
-            }
-        }
-        uBit.display.scroll("-");
-        uBit.display.scroll((int)nvStore->getGasMin());
-        uBit.display.scroll("t");
-        uBit.display.scroll((int)bme680Data->temperature);
-        uBit.display.scroll("+");
-        uBit.display.scroll((int)nvStore->getTempMax());
-        uBit.display.scroll("-");
-        uBit.display.scroll((int)nvStore->getTempMin());
-        uBit.display.scroll("p");
-        uBit.display.scroll((int)bme680Data->pressure);
-        uBit.display.scroll("+");
-        uBit.display.scroll((int)nvStore->getPressMax());
-        uBit.display.scroll("-");
-        uBit.display.scroll((int)nvStore->getPressMin());
-        uBit.display.scroll("h");
-        uBit.display.scroll((int)bme680Data->humidity);
-        uBit.display.scroll("+");
-        uBit.display.scroll((int)nvStore->getHumMax());
-        uBit.display.scroll("-");
-        uBit.display.scroll((int)nvStore->getHumMin());
+    if (sgp30 != NULL) {
+        ManagedString send = ManagedString("IaqTvoc ") + ManagedString((int)sgp30->TVOC);
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqMaxVoc ") + ManagedString((int)nvStore->getVocMax());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqCo2 ") + ManagedString((int)sgp30->eCO2);
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqMaxCo2 ") + ManagedString((int)nvStore->getCoMax());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+    }else {
+         radio -> sendToMakeCodeDevices("IAQ no sgp30");
+         uBit.sleep(RADIO_DELAY);
     }
     
-    if (sgp30!=NULL) {
-        uBit.display.scroll("v");
-        uBit.display.scroll((int)sgp30->TVOC);
-        uBit.display.scroll("+");
-        uBit.display.scroll((int)nvStore->getVocMax());
-        uBit.display.scroll("c");
-        uBit.display.scroll((int)sgp30->eCO2);
-        uBit.display.scroll("+");
-        uBit.display.scroll((int)nvStore->getCoMax());
+    if (bme680Data!=NULL) {
+        ManagedString send = ManagedString("IaqGas ") + ManagedString((int)bme680Data->gas_resistance);
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqMaxGas ") + ManagedString((int)nvStore->getGasMax());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqMinGas ") + ManagedString((int)nvStore->getGasMin());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+          
+        send = ManagedString("IaqT ") + ManagedString((int)bme680Data->temperature);
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqMaxT ") + ManagedString((int)nvStore->getTempMax());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqMinT ") + ManagedString((int)nvStore->getTempMin());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqPress ") + ManagedString((int)bme680Data->pressure);
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        /*
+        send = ManagedString("IaqMaxP ") + ManagedString((int)nvStore->getPressMax());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        send = ManagedString("IaqMinP ") + ManagedString((int)nvStore->getPressMin());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        */
+        send = ManagedString("IaqHum ") + ManagedString((int)bme680Data->humidity);
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        
+        send = ManagedString("IaqMaxH ") + ManagedString((int)nvStore->getHumMax());
+        radio -> sendToMakeCodeDevices(send);
+        uBit.sleep(RADIO_DELAY);
+        send = ManagedString("IaqMinH ") + ManagedString((int)nvStore->getHumMin());
+        radio -> sendToMakeCodeDevices(send);
+     } else {
+         radio -> sendToMakeCodeDevices("IAQ no BME680");
     }
+    startMeasureLoops();
+    release_fiber();
 }
 
+/*
 void onButtonA(MicroBitEvent evt)
 {
     if (runningLoops>0) {
@@ -288,30 +420,30 @@
         startMeasureLoops();
     }
 }
-
-void onButtonB(MicroBitEvent evt)
+*/
+void switchLightLevel(MicroBitEvent evt)
 {
-    switch (++displayState) {
-        case 1:
-            uBit.display.setBrightness(5);
+    switch (displayBrightness) {
+        case 255:
+            displayBrightness = 10;
             break;
-        case 2:
-            uBit.display.disable();
+        case 10:
+            displayBrightness =0;
             break;
         default:
-            uBit.display.setBrightness(255);
-            uBit.display.enable();
-            displayState = 0;
+            displayBrightness = 255;
     }
 }
 
-void onButtonAB(MicroBitEvent evt)
+
+void clearIQQBaseline(MicroBitEvent evt)
 {
-    waitForLooppsToFinish();
-    nvStore->clear();
-    uBit.display.scroll("clear");
+    nvStore->clearIQQBaseline();
+    uBit.display.scroll("base line clear");
+    uBit.reset();
 }
 
+
 const char* runSofwareModuleTests() {
     // heap we've got plenty, stack is rare
     AppSpecificTestrunner* runner = new AppSpecificTestrunner();
@@ -320,21 +452,44 @@
     return result;
     }
 
+void onData(MicroBitEvent e) {
+    ManagedString rcv= radio->received();
+    if (rcv == CMD_MEASURE_AND_PUBLISH) {
+        create_fiber(publishResults);
+    } else if (rcv == CMD_RESET_TEMP_HUM_CO2) {
+        nvStore->resetTmpHumCo2();
+        create_fiber(publishResults);
+    } else if (rcv == CMD_STORE_CURRENT_BASELINE) {
+        if (checkAndStoreSgp30Baseline()) {
+            radio -> sendToMakeCodeDevices("baseline updated");
+        } else {
+            radio -> sendToMakeCodeDevices("baseline not updated");
+        }
+    } else if (rcv == CMD_SET_BASELINE) {
+        sgp30SetBaseline(rcv);
+    }
+}
+
 int main()
 {
     uBit.init();
+    uBit.display.scroll("i");
     
-    uBit.messageBus.listen(MICROBIT_ID_BUTTON_A, MICROBIT_BUTTON_EVT_CLICK, onButtonA);
-    uBit.messageBus.listen(MICROBIT_ID_BUTTON_B, MICROBIT_BUTTON_EVT_CLICK, onButtonB);
-    uBit.messageBus.listen(MICROBIT_ID_BUTTON_AB, MICROBIT_BUTTON_EVT_CLICK, onButtonAB);
+    //uBit.messageBus.listen(MICROBIT_ID_BUTTON_A, MICROBIT_BUTTON_EVT_CLICK, onButtonA);
+    uBit.messageBus.listen(MICROBIT_ID_BUTTON_B, MICROBIT_BUTTON_EVT_CLICK, switchLightLevel);
+    uBit.messageBus.listen(MICROBIT_ID_BUTTON_AB, MICROBIT_BUTTON_EVT_CLICK, clearIQQBaseline);
+    uBit.messageBus.listen(MICROBIT_ID_RADIO, MICROBIT_RADIO_EVT_DATAGRAM, onData);
     
     callbacks = new I2cCallbacks(&uBit);
     nvStore = new IaqNonVolatileStore(&uBit);
+    
+    radio = new JavaScriptRadio(&uBit, RADIO_GROUP);
 
     uBit.display.scroll("t");
     const char* testResults = runSofwareModuleTests();
     if (! Testrunner::messageOK(testResults)) {
-        uBit.display.scroll(testResults);
+        //uBit.display.scroll(testResults);
+        radio -> sendToMakeCodeDevices("IAQ tests failed " +ManagedString(testResults));
         return -1;
         }