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@30:2958c6c803b9, 2018-12-15 (annotated)

Committer:
jsa1969
Date:
Sat Dec 15 16:35:09 2018 +0000
Revision:
30:2958c6c803b9
Parent:
27:cb75a0c5c52a
Child:
33:af2dfab24ca9
do not store SGP30 min values in microbit.storage, because they are always 0/400

Who changed what in which revision?

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