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

NvStore/nvstore.h@45:d6a9fd9c8200, 2019-02-13 (annotated)

Committer:
jsa1969
Date:
Wed Feb 13 22:39:36 2019 +0000
Revision:
45:d6a9fd9c8200
Parent:
43:f968ca84d4ed 
more unit tests

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jsa1969 38:0f29a0ea64ca 1 #ifndef NVSTORE_H
jsa1969 38:0f29a0ea64ca 2 #define NVSTORE_H
jsa1969 38:0f29a0ea64ca 3
jsa1969 11:6844a5578b4f 4 #include "mbed.h"
jsa1969 11:6844a5578b4f 5 #include "MicroBit.h"
jsa1969 11:6844a5578b4f 6
jsa1969 33:af2dfab24ca9 7 class MovingAverage;
jsa1969 11:6844a5578b4f 8
jsa1969 11:6844a5578b4f 9 class NvStore {
jsa1969 11:6844a5578b4f 10 public:
jsa1969 39:efe22f143e47 11 static const int AVERAGE_BUFFER_SIZE;
jsa1969 39:efe22f143e47 12
jsa1969 12:96eb06e837f4 13 NvStore(MicroBit* uBit);
jsa1969 33:af2dfab24ca9 14 ~NvStore();
jsa1969 17:a2c4dd192146 15
jsa1969 12:96eb06e837f4 16 void resetNvStore();
jsa1969 17:a2c4dd192146 17
jsa1969 27:cb75a0c5c52a 18 void updateGas(const uint32_t gas, const uint32_t humidity);
jsa1969 27:cb75a0c5c52a 19 uint32_t getGasMax(const uint32_t humidity);
jsa1969 14:71060505061e 20 uint32_t getGasMin();
jsa1969 17:a2c4dd192146 21
jsa1969 19:52e19461e867 22 void updateTemp(const int16_t temperature);
jsa1969 19:52e19461e867 23 int16_t getTempMax();
jsa1969 19:52e19461e867 24 int16_t getTempMin();
jsa1969 14:71060505061e 25
jsa1969 17:a2c4dd192146 26 void updatePress(const uint32_t pressure);
jsa1969 17:a2c4dd192146 27 uint32_t getPressMax();
jsa1969 17:a2c4dd192146 28 uint32_t getPressMin();
jsa1969 14:71060505061e 29
jsa1969 17:a2c4dd192146 30 void updateHumidity(const uint32_t humidity);
jsa1969 17:a2c4dd192146 31 uint32_t getHumMax();
jsa1969 17:a2c4dd192146 32 uint32_t getHumMin();
jsa1969 12:96eb06e837f4 33
jsa1969 18:c4ac93e01027 34 void updateVoc(const uint32_t voc);
jsa1969 18:c4ac93e01027 35 uint32_t getVocMax();
jsa1969 18:c4ac93e01027 36
jsa1969 18:c4ac93e01027 37 void updateCo(const uint32_t co);
jsa1969 18:c4ac93e01027 38 uint32_t getCoMax();
jsa1969 38:0f29a0ea64ca 39
jsa1969 38:0f29a0ea64ca 40 const uint32_t* debugInfo();
jsa1969 43:f968ca84d4ed 41 bool strayData();
jsa1969 18:c4ac93e01027 42
jsa1969 12:96eb06e837f4 43 private:
jsa1969 12:96eb06e837f4 44 MicroBit* _uBit;
jsa1969 33:af2dfab24ca9 45
jsa1969 33:af2dfab24ca9 46 MovingAverage* _movingAverage;
jsa1969 33:af2dfab24ca9 47
jsa1969 19:52e19461e867 48 int16_t _tempMax, _tempMin;
jsa1969 27:cb75a0c5c52a 49 uint32_t _maxGas[10], _minGas,
jsa1969 17:a2c4dd192146 50 _pressMax, _pressMin,
jsa1969 18:c4ac93e01027 51 _humMax, _humMin,
jsa1969 30:2958c6c803b9 52 _vocMax,
jsa1969 30:2958c6c803b9 53 _coMax;
jsa1969 14:71060505061e 54
jsa1969 34:069c4f6d5b2c 55 bool gasWithinReasonableRangeFromAverage(const uint32_t gas);
jsa1969 14:71060505061e 56 uint32_t getStored(const char* key, const uint32_t defaultVal);
jsa1969 19:52e19461e867 57 int16_t getStored16(const char * key, const int16_t defaultVal);
jsa1969 14:71060505061e 58 void update(const uint32_t value, uint32_t* maxVal, uint32_t* minVal, const char* maxKey, const char* minKey);
jsa1969 27:cb75a0c5c52a 59 static char getIndex(const uint32_t humidity);
jsa1969 11:6844a5578b4f 60 };
jsa1969 11:6844a5578b4f 61
jsa1969 11:6844a5578b4f 62 #endif // NVSTORE_H