WeatherDuino Forum - User support forum for 4Pro Air Quality Measurement equipment

Problem with Optional CO2 sensor

Tue, 10 Feb 2026 17:04:30 +0000

Hi.
After a long time and a lot of reading I managed to get the AQM-III working.
But the only problem I have is with the Sensirion SCD30, it worked for 2 reboots then stopped and shows me 0.
I have Arduino IDE 1.8.19 / ESP32 2.0.3 and firmware 6.1_b013.
I would appreciate any help. Is there a chance that the Sensor is broken?

George.

Screenshot_20260210_185831_Chrome.jpg Size: 222,91 KB Downloads: 71

Load error and system reboot issue

Fri, 09 Jan 2026 04:19:12 +0000

I am getting the following error when the AQ111 initially loads.

E (4070) gpio: gpio_set_level(226): GPIO output gpio_num error

Also, the AQ111 reboots the cpu every second refresh of the PMS7003, refer towards the end of the output from the serial port I have attached. Would appear that the reset is triggered by the load error.

Am using Arduino 1.8.19 and libraries supplied.

Any assistance would be appreciated.

Code:
39:44.603 -> 

39:44.603 -> rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

39:44.603 -> configsip: 0, SPIWP:0xee

39:44.603 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

39:44.603 -> mode:DIO, clock div:1

39:44.603 -> load:0x3fff0030,len:1184

39:44.603 -> load:0x40078000,len:12812

39:44.603 -> load:0x40080400,len:3032

39:44.603 -> entry 0x400805e4

39:44.942 -> Brownout detector disabled

39:44.942 ->   WeatherDuino 4Pro

39:44.942 -> Air Quality Monitor III

39:44.942 ->   Firmware: 6.1_b012

39:44.942 -> 

39:48.979 -> E (4070) gpio: gpio_set_level(226): GPIO output gpio_num error

39:48.979 -> 

39:48.979 -> Connecting to zzzzzzzzzzz

39:49.221 -> .......

39:49.846 -> WiFi connected!

39:49.846 -> IP address: 192.168.0.228

39:49.846 -> MDNS responder setup correctly.

39:50.761 -> Get time OK.

39:50.761 -> UTC Time  : 1767931790

39:50.761 -> Local Time: Friday, 09 January 2026 14:39:50

39:50.761 -> Reading Temp, Hum and Pressure

39:50.761 -> Temperature: 31.28

39:50.761 -> Humidity: 38.76

39:50.761 -> Amb. Pressure: 995.09

39:50.761 -> SL Pressure: 1006.65

39:50.761 -> 

39:50.761 -> Setting measurement range to: 5000

39:50.810 -> FF,99,1,0,0,0,0,0,66,

39:50.810 -> 66,66

39:50.810 -> Measurement range changed!

39:53.833 -> Enabling ABC

40:06.871 -> Initial reading: 1

40:07.867 -> 80,30,27,FB,3F,30,36,FC,3F,

40:07.867 -> Calculated crc: D

40:07.867 -> Wrong reply from CO2 sensor!

40:07.867 -> 

40:13.880 -> Initial reading: 2

40:13.880 -> FF,86,1,9A,4B,0,0,0,94,

40:13.880 -> Calculated crc: 94

40:13.880 -> CO2 RAW: 410

40:13.880 -> CO2 Comp: 412

40:13.880 -> Z19 Temp: 35

40:13.880 -> 

40:19.887 -> Initial reading: 3

40:19.936 -> FF,86,1,9A,4B,0,0,0,94,

40:19.936 -> Calculated crc: 94

40:19.936 -> CO2 RAW: 410

40:19.936 -> CO2 Comp: 412

40:19.936 -> Z19 Temp: 35

40:19.936 -> 

40:25.942 -> Initial reading: 4

40:25.942 -> FF,86,1,9A,4B,0,0,0,94,

40:25.942 -> Calculated crc: 94

40:25.942 -> CO2 RAW: 410

40:25.942 -> CO2 Comp: 412

40:25.942 -> Z19 Temp: 35

40:25.942 -> 

40:31.948 -> Initial reading: 5

40:31.948 -> FF,86,1,9A,4B,0,0,0,94,

40:31.948 -> Calculated crc: 94

40:31.948 -> CO2 RAW: 410

40:31.948 -> CO2 Comp: 412

40:31.997 -> Z19 Temp: 35

40:31.997 -> 

40:37.986 -> Initial reading: 6

40:37.986 -> FF,86,1,9A,4B,0,0,0,94,

40:37.986 -> Calculated crc: 94

40:37.986 -> CO2 RAW: 410

40:37.986 -> CO2 Comp: 412

40:37.986 -> Z19 Temp: 35

40:37.986 -> 

40:43.977 -> Initial reading: 7

40:44.024 -> FF,86,1,9A,4B,0,0,0,94,

40:44.024 -> Calculated crc: 94

40:44.024 -> CO2 RAW: 410

40:44.024 -> CO2 Comp: 412

40:44.024 -> Z19 Temp: 35

40:44.024 -> 

40:50.021 -> Initial reading: 8

40:50.021 -> FF,86,1,9A,4B,0,0,0,94,

40:50.021 -> Calculated crc: 94

40:50.021 -> CO2 RAW: 410

40:50.021 -> CO2 Comp: 412

40:50.069 -> Z19 Temp: 35

40:50.069 -> 

40:56.055 -> Initial reading: 9

40:56.055 -> FF,86,1,9A,4B,0,0,0,94,

40:56.055 -> Calculated crc: 94

40:56.055 -> CO2 RAW: 410

40:56.055 -> CO2 Comp: 412

40:56.055 -> Z19 Temp: 35

40:56.055 -> 

41:02.068 -> Initial reading: 10

41:02.068 -> FF,86,1,9A,4B,0,0,0,94,

41:02.068 -> Calculated crc: 94

41:02.116 -> CO2 RAW: 410

41:02.116 -> CO2 Comp: 412

41:02.116 -> Z19 Temp: 35

41:02.116 -> 

41:08.072 -> Initial reading: 11

41:08.119 -> FF,86,1,9A,4B,0,0,0,94,

41:08.119 -> Calculated crc: 94

41:08.119 -> CO2 RAW: 410

41:08.119 -> CO2 Comp: 412

41:08.119 -> Z19 Temp: 35

41:08.119 -> 

41:14.110 -> Initial reading: 12

41:14.157 -> FF,86,1,8F,4B,0,0,0,9F,

41:14.157 -> Calculated crc: 9F

41:14.157 -> CO2 RAW: 399

41:14.157 -> CO2 Comp: 401

41:14.157 -> Z19 Temp: 35

41:14.157 -> 

41:20.118 -> Initial reading: 13

41:20.166 -> FF,86,1,8F,4B,0,0,0,9F,

41:20.166 -> Calculated crc: 9F

41:20.166 -> CO2 RAW: 399

41:20.166 -> CO2 Comp: 401

41:20.166 -> Z19 Temp: 35

41:20.166 -> 

41:26.158 -> Initial reading: 14

41:26.207 -> FF,86,1,8E,4B,0,0,0,A0,

41:26.207 -> Calculated crc: A0

41:26.207 -> CO2 RAW: 398

41:26.207 -> CO2 Comp: 400

41:26.207 -> Z19 Temp: 35

41:26.207 -> 

41:32.203 -> Init MH-Z19 Ended

41:32.203 -> 

41:32.203 -> 

41:32.203 -> Waking up the dust sensor...

41:32.203 -> Reading will be done 40s later.

41:32.203 -> 

42:03.753 -> Reading Temp, Hum and Pressure

42:03.753 -> Temperature: 31.27

42:03.753 -> Humidity: 38.70

42:03.753 -> Amb. Pressure: 995.08

42:03.753 -> SL Pressure: 1006.64

42:03.753 -> 

42:12.180 -> Fan State: 1

42:12.180 -> Reading the dust sensor...

42:12.979 -> PMS7003 valid read: 1

42:12.979 -> 

42:12.979 -> 

PMS7003 readings:

42:12.979 -> PM1.0 : 0.00

42:12.979 -> PM2.5 : 2.99

42:12.979 -> PM10.0: 3.98

42:12.979 -> 

42:13.027 -> FF,86,1,8D,4B,0,0,0,A1,

42:13.027 -> Calculated crc: A1

42:13.027 -> CO2 RAW: 397

42:13.027 -> CO2 Comp: 399

42:13.027 -> Z19 Temp: 35

42:13.027 -> 

42:13.027 -> CO2 1H Avg: 399

42:46.216 -> E (181277) gpio: gpio_set_level(226): GPIO output gpio_num error

42:46.554 -> 

42:46.554 -> abort() was called at PC 0x40085797 on core 1

42:46.554 -> 

42:46.554 -> 

42:46.554 -> Backtrace:0x400842b1:0x3ffbec2c |<-CORRUPTED

42:46.554 -> 

42:46.554 -> 

42:46.554 -> 

42:46.554 -> 

42:46.554 -> ELF file SHA256: 0000000000000000

42:46.554 -> 

42:46.554 -> Rebooting...

42:46.554 -> ets Jul 29 2019 12:21:46

42:46.554 -> 

42:46.554 -> rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

/code]

Help with Arduino IDE

Mon, 17 Nov 2025 10:42:05 +0000

Hello
I downloaded your firmware for the AQMIII to start work on my current AQMIII but I get the following error :

Code:
Arduino: 1.8.19 (Windows 10), Πλακέτα:"MH ET LIVE ESP32MiniKit, 80MHz, Default with spiffs, 921600, None"

In file included from C:\Users\user\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b012\WeatherDuino_AQM_III_v6.1_b012.ino:39:

Config_Options.h:61:1: error: 'define' does not name a type; did you mean 'rewind'?

 define SDC30_ELEVATION_CALIBRATION_METHOD   1   // 0= Elevation defined above, 1= Atmospheric Pressure from BME280 sensor (overrides ELEVATION)

 ^~~~~~

 rewind

In file included from C:\Users\user\Documents\Arduino\libraries\esp8266-OLED-SSD1306/SH1106Wire.h:31,

                 from C:\Users\user\Documents\Arduino\libraries\esp8266-OLED-SSD1306/SH1106.h:30,

                 from C:\Users\user\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b012\WeatherDuino_AQM_III_v6.1_b012.ino:57:

C:\Users\user\Documents\Arduino\libraries\esp8266-OLED-SSD1306/OLEDDisplay.h: In member function 'virtual bool OLEDDisplay::connect()':

C:\Users\user\Documents\Arduino\libraries\esp8266-OLED-SSD1306/OLEDDisplay.h:253:29: warning: no return statement in function returning non-void [-Wreturn-type]

     virtual bool connect() {};

                             ^

C:\Users\user\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b012\WeatherDuino_AQM_III_v6.1_b012.ino: In function 'void setup()':

WeatherDuino_AQM_III_v6.1_b012:510:12: error: 'SCD30_TemperatureOffset' was not declared in this scope

        if (SCD30_TemperatureOffset != 0)

            ^~~~~~~~~~~~~~~~~~~~~~~

C:\Users\user\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b012\WeatherDuino_AQM_III_v6.1_b012.ino:510:12: note: suggested alternative: 'SCD30_Temperature'

        if (SCD30_TemperatureOffset != 0)

            ^~~~~~~~~~~~~~~~~~~~~~~

            SCD30_Temperature

Βρέθηκαν πολλαπλές βιβλιοθήκες για "WiFi.h"

Σε χρήση: C:\Users\user\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\libraries\WiFi

Όχι σε χρήση: C:\Program Files (x86)\Arduino\libraries\WiFi

exit status 1

'define' does not name a type; did you mean 'rewind'?

Αυτή η αναφορά θα παρείχε περισσότερες πληροφορίες με 

"Εμφάνιση πλεονάζουσα έξοδος κατά τη σύνταξη"

Επιλογή από το Αρχείο -> Προτιμήσεις.

i use it Arduino IDE 1.8.19
Sorry but I have no knowledge at all about IDE .
Any help is welcome .

George.

Firmware Update instructions in case you forgot

Wed, 05 Nov 2025 01:54:57 +0000

I had some trouble to remember how to do the firmware update so I made a small howto for those who tend to forget things and don't work often with Arduino IDE. The instructions below should save you some time and are similar to what I published on the CumulusMX forum (in the Alpha thread).

--------------

If you still have the Arduino IDE (1.8.19) config it is easy: just download the new firmware from the site (look at the date), unzip into the Arduino directory and compile and upload to the board.

If you don't have the config:

Install the IDE 1.8.19
Install the ESP32 board:
- In your Arduino IDE, go to File> Preferences.
- Open the Boards Manager. Go to Tools > Board > Boards Manager…
- Search for ESP32 and press install button for the “ESP32 by Espressif Systems“
- Install version 2.0.3
Move the WeatherDuino_AQM_III directory from the zip to the Arduino directory. It contains a libraries, software and utilities directory
Move the libraries directory from the firmware zip up to the Arduino directory first level
Edit the Config_Options.h and Credentials.h to what you need
Verify and when no errors => Upload

I think that should be it.
Don't even try other versions of the IDE and Board unless you want to experiment.
If werk_ag decides to move to a next IDE version no doubt he will indicate which versions you need and publish the libraries accordingly.

Compile errors

Fri, 31 Oct 2025 12:04:23 +0000

Hi,
I downloaded your firmware for the AQMIII to start work on my current AQMIII to get it fixed for the problem I reported earlier.
I finally managed to get the correct board in place (ESP32 Dev Module) and compiled the code as is after configuration.
I get loads of errors, the short version - all library resolve seems to go OK - is below. I can post the long version as well.

Any suggestion? (IDE version 2.3.6; and no this is not my daily doing so you may be verbose)
Should I update the libs, if so howto without damage?

Code:
Compiling sketch...

"C:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp-x32\\2507/bin/xtensa-esp32-elf-g++" -MMD -c "@C:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp32-arduino-libs\\idf-release_v5.5-07e9bf49-v1\\esp32/flags/cpp_flags" -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"windows\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 "@C:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp32-arduino-libs\\idf-release_v5.5-07e9bf49-v1\\esp32/flags/defines" "-IC:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\software\\WeatherDuino_AQM_III_v6.1_b010" -iprefix "C:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp32-arduino-libs\\idf-release_v5.5-07e9bf49-v1\\esp32/include/" "@C:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp32-arduino-libs\\idf-release_v5.5-07e9bf49-v1\\esp32/flags/includes" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp32-arduino-libs\\idf-release_v5.5-07e9bf49-v1\\esp32/qio_qspi/include" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\cores\\esp32" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\variants\\esp32" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\EspSoftwareSerial\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\WiFi\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\Network\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\ESPmDNS\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\WebServer\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\FS\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\HTTPClient\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\NetworkClientSecure\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\ArduinoOTA\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\Update\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\SPI\\src" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\Wire\\src" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\RadioHead" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\esp8266-OLED-SSD1306" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\Timer" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\BME280-3.0.0\\src" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\ArduinoJson\\src" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\SPS30-master" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\SparkFun_SCD30_Arduino_Library\\src" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\ThingSpeak\\src" "-Ic:\\Users\\hansr\\Documents\\Arduino\\WeatherDuino_AQM_III\\libraries\\RunningAverage" "-IC:\\Users\\hansr\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\3.3.2\\libraries\\Hash\\src" "@C:\\Users\\hansr\\AppData\\Local\\arduino\\sketches\\4180D39E9A8D0EE7A69B2AE0F3C4DF00/build_opt.h" "@C:\\Users\\hansr\\AppData\\Local\\arduino\\sketches\\4180D39E9A8D0EE7A69B2AE0F3C4DF00/file_opts" "C:\\Users\\hansr\\AppData\\Local\\arduino\\sketches\\4180D39E9A8D0EE7A69B2AE0F3C4DF00\\sketch\\WeatherDuino_AQM_III_v6.1_b010.ino.cpp" -o "C:\\Users\\hansr\\AppData\\Local\\arduino\\sketches\\4180D39E9A8D0EE7A69B2AE0F3C4DF00\\sketch\\WeatherDuino_AQM_III_v6.1_b010.ino.cpp.o"

In file included from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\esp8266-OLED-SSD1306/SH1106Wire.h:31,

                 from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\esp8266-OLED-SSD1306/SH1106.h:30,

                 from C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\WeatherDuino_AQM_III_v6.1_b010.ino:57:

c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\esp8266-OLED-SSD1306/OLEDDisplay.h: In member function 'virtual bool OLEDDisplay::connect()':

c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\esp8266-OLED-SSD1306/OLEDDisplay.h:253:29: error: no return statement in function returning non-void [-Werror=return-type]

  253 |     virtual bool connect() {};

      |                             ^

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino: In function 'void send_PMaverages()':

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino:146:34: warning: 'DynamicJsonDocument' is deprecated: use JsonDocument instead [-Wdeprecated-declarations]

  146 |     DynamicJsonDocument AQ_sensor(420);

      |                                  ^

In file included from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson.hpp:65,

                 from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson.h:9,

                 from C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\WeatherDuino_AQM_III_v6.1_b010.ino:61:

c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson/compatibility.hpp:125:58: note: declared here

  125 | class ARDUINOJSON_DEPRECATED("use JsonDocument instead") DynamicJsonDocument

      |                                                          ^~~~~~~~~~~~~~~~~~~

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino: In function 'void send_PMdata()':

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino:178:32: warning: 'DynamicJsonDocument' is deprecated: use JsonDocument instead [-Wdeprecated-declarations]

  178 |     DynamicJsonDocument AQMData(280);

      |                                ^

c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson/compatibility.hpp:125:58: note: declared here

  125 | class ARDUINOJSON_DEPRECATED("use JsonDocument instead") DynamicJsonDocument

      |                                                          ^~~~~~~~~~~~~~~~~~~

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino: In function 'void send_AirLink()':

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino:207:5: warning: 'template class ArduinoJson::V742PB22::StaticJsonDocument' is deprecated: use JsonDocument instead [-Wdeprecated-declarations]

  207 |     StaticJsonDocument<800> airlink;

      |     ^~~~~~~~~~~~~~~~~~

c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson/compatibility.hpp:63:58: note: declared here

   63 | class ARDUINOJSON_DEPRECATED("use JsonDocument instead") StaticJsonDocument

      |                                                          ^~~~~~~~~~~~~~~~~~

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino:210:49: warning: 'ArduinoJson::V742PB22::JsonObject ArduinoJson::V742PB22::JsonDocument::createNestedObject(TChar*) [with TChar = const char]' is deprecated: use doc[key].to() instead [-Wdeprecated-declarations]

  210 |     JsonObject data = airlink.createNestedObject("data");

      |                       ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~

In file included from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson.hpp:42:

c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson/Document/JsonDocument.hpp:376:14: note: declared here

  376 |   JsonObject createNestedObject(TChar* key) {

      |              ^~~~~~~~~~~~~~~~~~

C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\software\WeatherDuino_AQM_III_v6.1_b010\NET.ino:215:73: warning: 'ArduinoJson::V742PB22::JsonObject ArduinoJson::V742PB22::detail::VariantRefBase::createNestedObject() const [with TDerived = ArduinoJson::V742PB22::detail::MemberProxy]' is deprecated: use add() instead [-Wdeprecated-declarations]

  215 |     JsonObject data_conditions_0 = data["conditions"].createNestedObject();

      |                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~

In file included from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson/Array/ElementProxy.hpp:7,

                 from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson/Array/JsonArray.hpp:7,

                 from c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson.hpp:38:

c:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson\src/ArduinoJson/Variant/VariantRefBase.hpp:233:14: note: declared here

  233 |   JsonObject createNestedObject() const;

      |              ^~~~~~~~~~~~~~~~~~

cc1plus.exe: some warnings being treated as errors

Using library EspSoftwareSerial at version 8.1.0 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\EspSoftwareSerial 

Using library WiFi at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\WiFi 

Using library Networking at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\Network 

Using library ESPmDNS at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\ESPmDNS 

Using library WebServer at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\WebServer 

Using library FS at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\FS 

Using library HTTPClient at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\HTTPClient 

Using library NetworkClientSecure at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\NetworkClientSecure 

Using library ArduinoOTA at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\ArduinoOTA 

Using library Update at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\Update 

Using library SPI at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\SPI 

Using library Wire at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\Wire 

Using library RadioHead at version 1.143.1 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\RadioHead 

Using library ESP8266 and ESP32 Oled Driver for SSD1306 display at version 3.2.7 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\esp8266-OLED-SSD1306 

Using library Timer in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\Timer (legacy)

Using library BME280 at version 3.0.0 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\BME280-3.0.0 

Using library ArduinoJson at version 7.4.2 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ArduinoJson 

Using library sensirion-sps at version 1.0.0 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\SPS30-master 

Using library SparkFun SCD30 Arduino Library at version 1.0.20 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\SparkFun_SCD30_Arduino_Library 

Using library ThingSpeak at version 2.1.1 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\ThingSpeak 

Using library RunningAverage at version 0.4.8 in folder: C:\Users\hansr\Documents\Arduino\WeatherDuino_AQM_III\libraries\RunningAverage 

Using library Hash at version 3.3.2 in folder: C:\Users\hansr\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.2\libraries\Hash 

exit status 1

Compilation error: exit status 1

AirLink response

Thu, 30 Oct 2025 11:58:12 +0000

Hi,

I am running CumulusMX with an AQMIII sensor in an Alpha test setup for version CMX 4.7 (with .NET10 and VS2026). This development setup did not read/register data from my AQMIII (dated 2021 I think). Mcrossley wrote:

"OK, your AirLink issue is tracked down. The now stricter JSON parsing is throwing an error because the JSON being returned does not comply with the Davis specification.

It is the final field "error".

My real AirLink returns ...."error":null
yours returns.... "error":0

The Davis spec says

Quote:The error field is usually null on success, but in the event of an error, will be an object with two fields - code and message.
code is a numeric error code
message is a human readable error message string describing the error.

So error should normally be null or...

Code:
"error":{"code":123,"message":"Error message"}

"

Could you change the firmware to reflect this please?

You can contact Mark on the CMX forum if need be.

AQM3 Initial Setup

Tue, 14 May 2024 01:06:54 +0100

Hi Caneira,
Attaching what I have done, sensors shown and my config file. Maybe you can help me because I have hit a brick wall and am ready to junk this project with a mark in the "fail" column.

Installed sensors:
Dust PMS7003
CO2 SCD30
Pres/Temp/Hum BE280

Power source: 5V, 700 mA (LG Cel Phone charger)

Installed Board firmware: MH ER LIVE ESP32 MiniKit.
installed the .rar file located on the forum then Arduino installed updates.
Tried setting to debug mode for dust sensor, but cannot see anything was done.
Attaching the Arduino Logs.
Connection for OLED display is there and output works (not showing CO2 or AQ Particulates values)

Coated the outside of the connections with Conformal coating for outdoor use. Made sure no coating go on male/female connectors.

I can see Pres/Hum/Temp and board vitals (elev and name on IP/aqnow). No output from the dust or CO2 sensors.

Ordered a replacement sensor and swapped out PMS7003. Still doesn't work.

output.txt Size: 1,75 KB Downloads: 6

Config_Options.txt Size: 13,4 KB Downloads: 6

20240416_211201.jpg Size: 115,1 KB Downloads: 148

[attachment=3226]

20240418_151427.jpg Size: 453,44 KB Downloads: 147

Compiling logger firmware for AQM3

Mon, 11 Mar 2024 23:49:08 +0000

Hi,
Never used Arduino to compile before so am unsure which board to select on the AQM3? I am really looking forward to seeing if I can pull this off. Any help would be appreciated.

Screenshot 2024-03-11 174733.png Size: 23,31 KB Downloads: 57

AQMIII and Sensor Community

Tue, 25 Jul 2023 07:05:08 +0100

Hello WeatherDuino community,

After a long time and moving I'm back. I now have vacation and time to rebuild my weather station.
But simply unpacking, connecting and everything works would be too easy.
I have now updated the firmware of the AQM III and I noticed that the data to the sensor community is no longer being transmitted or is not being transmitted correctly.

Does the data transfer work with the current firmware?

Otherwise, my request to @Werk_AG, would you please take a look at the source code?

If I understood correctly, the Sensor Community API interface has changed.

Greetings from Germany,
Andre

Problem solved, I got confused by the many SensorIDs and UIDs

C02 Sensor Reading

Sat, 10 Jun 2023 22:52:54 +0100

Ive had my AQM III working for a while now and decided to add the SCD30 sensor but it is giving me strange readings, much higher than it should be, any guesses?

Zac

Screen Shot 2023-06-10 at 9.29.35 AM.png Size: 81,42 KB Downloads: 56

AQMIII Compile Error

Sun, 04 Jun 2023 03:00:17 +0100

HI,
When compiling code i get the following error:
'I2CAddr_0x76 is not a member of BME280I2C' Can you please assist?
Thanks
Jim

Any photos of a completed or partial stage of the unit?

Fri, 18 Nov 2022 14:26:51 +0000

any photos of a completed or partial stage of the unit?

geoff

Wifi Signal Bars

Wed, 29 Jun 2022 07:44:24 +0100

Noticed my Wifi Bars were missing on my display while testing.
Webpage was reporting RSSI as -55.

Would that mean all the IF statements below failed as the signal was exactly -55, not > or < ?
Bars did appear when Signal changed to -51.

Assume:-
if (rssi > -55) WiFibars = 3;

Will fix it but what will be appropriate for the other two lines?

Thanks

Phil.

Code:
// ---------------------------------------------------------------

//    Draw WiFi signal strenght on the clock display

// ---------------------------------------------------------------

#if (ENABLE_WIFI == 1)

  void get_Wifistrength()

  {

    rssi = WiFi.RSSI();

    if (rssi > -55) WiFibars = 3;

    else if (rssi < -55 && rssi > -70) WiFibars = 2;

    else if (rssi < -70 && rssi > -82) WiFibars = 1;

    else WiFibars = 0;

  } 

#endif

Edit:- Or would this work correctly?

Code:
#if (ENABLE_WIFI == 1)

  void get_Wifistrength()

  {

    rssi = WiFi.RSSI();

    if (rssi >= -55) WiFibars = 3;

    else if (rssi >= -70) WiFibars = 2;

    else if (rssi >= -82) WiFibars = 1;

    else WiFibars = 0;

  } 

#endif

CO² Calibration???

Thu, 23 Jun 2022 10:39:16 +0100

Just been reading about in the Source code & saw this,

Code:
#if (CO2_SENSORTYPE != 0)

       server.on("/calib_CO2", HTTP_GET, calibrate_CO2);

    #endif

And then found it points to this,

Code:
//---------------------------------------------------------

//     Execute Forced CO2 Calibration Command

//---------------------------------------------------------

#if (ENABLE_WIFI == 1 && CO2_SENSORTYPE != 0)

  void calibrate_CO2()

  {

    String Data  = F("HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n");

    Data += F("\r\n\r\n");

    Data += F("Air Quality Monitor");

    Data += F("");   

    Data += F("");

    Data += F("");    

    Data += F("");

    Data += F("");

    Data += F("WeatherDuino
Air Quality Monitor III");

    sprintf(CHAR_buf, "%d-%02d-%02d   %02d:%02d", timeinfo.tm_year +1900, timeinfo.tm_mon +1, timeinfo.tm_mday, timeinfo.tm_hour, timeinfo.tm_min);

    Data += CHAR_buf;

    Data += F("

");

    Data += F("");

    Data += F("");

    Data += F("
FORCED CO2 CALIBRATION COMMAND EXECUTED

");

    Data += F("You can close this page now.
");     

    Data += F("

");      

    Data += F("");

    server.send(200, "text/html", Data);      

    Data = "";

    #if (CO2_SENSORTYPE == 1)

      SCD30sensor.setForcedRecalibrationFactor(408);

      delay(6);   // Minimum >3ms

    #endif

    #if (CO2_SENSORTYPE == 2)

      MH_Z19_ZerPointCal();

      read_Z19(); 

    #endif

  } 

#endif

So I opened the URL 192.168.xx.xx/Calib_CO2 & see this,

Screenshot 2022-06-23 193347.jpg Size: 35,37 KB Downloads: 51

So what has that process actually done?
The device I executed it on has an SCD30, but also have another with an MH_19Z.

Is there any explanation posted anywhere or can you provide a basic outline.

Thanks

Phil

BME280 not reading.

Mon, 20 Jun 2022 01:03:37 +0100

Hi,

Just tried Version 6.1_b010 on one of my boards & notice the BME280 is not responding.
I have 2 units & have swapped the BME's & it doesn't appear that either is faulty.

This in turn seems to throw the CO2 reading out.

Both Boards have SPS30's.
First Board has a MH-Z19, Second Board has an SCD30.

My 2nd board works fine with Both BME280's, only difference is it's configured for an SCD30 & is still on Version 6.1_b007.

This is what I see in the Serial Monitor.

This is the first time I've complied from this PC & assume the IDE is working fine.
Results of the Compile are also attached.

Cheers

Phil

Code:
50:16.757 -> ets Jun  8 2016 00:22:57

50:16.757 -> 

50:16.757 -> rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

50:16.757 -> flash read err, 1000

50:16.757 -> ets_main.c 371 

50:17.132 -> ets Jun  8 2016 00:22:57

50:17.132 -> 

50:17.132 -> rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

50:17.132 -> configsip: 0, SPIWP:0xee

50:17.132 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

50:17.132 -> mode:DIO, clock div:1

50:17.132 -> load:0x3fff0030,len:1184

50:17.132 -> load:0x40078000,len:12812

50:17.132 -> load:0x40080400,len:3032

50:17.132 -> entry 0x400805e4

50:17.453 ->   WeatherDuino 4Pro

50:17.453 -> Air Quality Monitor III

50:17.453 ->   Firmware: 6.1_b010

50:17.453 -> 

50:18.478 -> 

50:18.478 -> Connecting to IITSNet-2G

50:18.571 -> 

50:18.571 -> Brownout detector was triggered

50:18.571 -> 

50:18.571 -> ets Jun  8 2016 00:22:57

50:18.571 -> 

50:18.571 -> rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

50:18.571 -> configsip: 0, SPIWP:0xee

50:18.571 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

50:18.571 -> mode:DIO, clock div:1

50:18.571 -> load:0x3fff0030,len:1184

50:18.571 -> load:0x40078000,len:12812

50:18.571 -> load:0x40080400,len:3032

50:18.571 -> entry 0x400805e4

50:18.895 ->   WeatherDuino 4Pro

50:18.895 -> Air Quality Monitor III

50:18.895 ->   Firmware: 6.1_b010

50:18.895 -> 

50:19.916 -> 

50:19.916 -> Connecting to IITSNet-2G

50:20.151 -> ..

50:20.243 -> WiFi connected!

50:20.243 -> IP address: 192.168.59.237

50:20.243 -> MDNS responder setup correctly.

50:21.679 -> Get time OK.

50:21.679 -> UTC Time  : 1655682621

50:21.679 -> Local Time: Monday, 20 June 2022 09:50:21

50:21.679 -> Reading Temp, Hum and Pressure

50:22.657 -> Temperature: nan

50:22.657 -> Humidity: nan

50:22.703 -> Amb. Pressure: nan

50:22.703 -> SL Pressure: nan

50:22.703 -> 

50:22.703 -> Setting measurement range to: 5000

50:22.703 -> FF,99,1,0,0,0,0,0,66,

50:22.703 -> 66,66

50:22.703 -> Measurement range changed!

50:25.720 -> Disabling ABC

50:38.722 -> Initial reading: 1

50:38.769 -> FF,86,1,B4,3D,0,0,0,88,

50:38.769 -> Calculated crc: 88

50:38.769 -> CO2 RAW: 436

50:38.769 -> CO2 Comp: 65535

50:38.769 -> Z19 Temp: 21

50:38.769 -> 

50:44.752 -> Initial reading: 2

50:44.752 -> FF,86,1,B4,3D,0,0,0,88,

50:44.752 -> Calculated crc: 88

50:44.752 -> CO2 RAW: 436

50:44.752 -> CO2 Comp: 65535

50:44.798 -> Z19 Temp: 21

50:44.798 ->

Code:
In file included from C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306/SH1106Wire.h:31,

                 from C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306/SH1106.h:30,

                 from D:\Arduino\WeatherDuino_AQM_III\v6.1_b010\software\WeatherDuino_AQM_III_v6.1_b010\WeatherDuino_AQM_III_v6.1_b010.ino:57:

C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306/OLEDDisplay.h: In member function 'virtual bool OLEDDisplay::connect()':

C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306/OLEDDisplay.h:253:29: warning: no return statement in function returning non-void [-Wreturn-type]

     virtual bool connect() {};

                             ^

In file included from C:\Program Files (x86)\Arduino\libraries\RadioHead_v1.121\RH_LoRaFileOps.cpp:5:

C:\Program Files (x86)\Arduino\libraries\RadioHead_v1.121/RH_LoRaFileOps.h:27:2: warning: #warning RH_LoRaFileOps unfinished [-Wcpp]

 #warning RH_LoRaFileOps unfinished

  ^~~~~~~

In file included from C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306\OLEDDisplayUi.h:31,

                 from C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306\OLEDDisplayUi.cpp:27:

C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306\OLEDDisplay.h: In member function 'virtual bool OLEDDisplay::connect()':

C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306\OLEDDisplay.h:253:29: warning: no return statement in function returning non-void [-Wreturn-type]

     virtual bool connect() {};

                             ^

In file included from C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306\OLEDDisplay.cpp:28:

C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306\OLEDDisplay.h: In member function 'virtual bool OLEDDisplay::connect()':

C:\Program Files (x86)\Arduino\libraries\esp8266-OLED-SSD1306\OLEDDisplay.h:253:29: warning: no return statement in function returning non-void [-Wreturn-type]

     virtual bool connect() {};

                             ^

C:\Program Files (x86)\Arduino\libraries\SPS30-master\sensirion_hw_i2c_implementation.cpp: In function 'int8_t sensirion_i2c_read(uint8_t, uint8_t*, uint16_t)':

C:\Program Files (x86)\Arduino\libraries\SPS30-master\sensirion_hw_i2c_implementation.cpp:98:36: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second:

     Wire.requestFrom(address, count);

                                    ^

In file included from C:\Program Files (x86)\Arduino\libraries\SPS30-master\sensirion_hw_i2c_implementation.cpp:78:

C:\Users\Phil.INVERELLIT\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\libraries\Wire\src/Wire.h:104:13: note: candidate 1: 'uint8_t TwoWire::requestFrom(int, int)'

     uint8_t requestFrom(int address, int size);

             ^~~~~~~~~~~

C:\Users\Phil.INVERELLIT\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.3\libraries\Wire\src/Wire.h:102:13: note: candidate 2: 'uint8_t TwoWire::requestFrom(uint8_t, uint8_t)'

     uint8_t requestFrom(uint8_t address, uint8_t size);

             ^~~~~~~~~~~

Sketch uses 822561 bytes (62%) of program storage space. Maximum is 1310720 bytes.

Global variables use 46068 bytes (14%) of dynamic memory, leaving 281612 bytes for local variables. Maximum is 327680 bytes.

Edit:- Here's Serial Output from my 2nd unit.

Code:
26:21.471 -> ets Jun  8 2016 00:22:57

26:21.471 -> 

26:21.471 -> rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

26:21.471 -> flash read err, 1000

26:21.471 -> ets_main.c 371 

26:21.842 -> ets Jun  8 2016 00:22:57

26:21.842 -> 

26:21.842 -> rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)

26:21.842 -> configsip: 0, SPIWP:0xee

26:21.842 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00

26:21.842 -> mode:DIO, clock div:1

26:21.842 -> load:0x3fff0018,len:4

26:21.842 -> load:0x3fff001c,len:1216

26:21.842 -> ho 0 tail 12 room 4

26:21.842 -> load:0x40078000,len:10944

26:21.842 -> load:0x40080400,len:6388

26:21.842 -> entry 0x400806b4

26:22.122 ->   WeatherDuino 4Pro

26:22.122 -> Air Quality Monitor III

26:22.122 ->   Firmware: 6.1_b007

26:22.122 -> 

26:24.210 -> SCD30 Auto calibration set to true

26:24.210 -> SCD30 Current altitude: 586 Meters

26:24.255 -> SCD30 Current temp. offset: 0.00ºC

26:24.302 -> 

26:24.302 -> Connecting to IITSNet-2G

26:24.489 -> .......................

26:26.726 -> WiFi connected!

26:26.726 -> IP address: 192.168.59.238

26:26.772 -> Get time OK.

26:26.772 -> UTC Time  : 1655684786

26:26.772 -> Local Time: Monday, 20 June 2022 10:26:26

26:26.772 -> Reading Temp, Hum and Pressure

26:26.820 -> 

26:26.820 -> CO2 RAW: 842

26:26.820 -> CO2 Instant: 846

26:26.820 -> Temperature: 23.55

26:26.820 -> Humidity: 41.16

26:26.820 -> Amb. Pressure: 955.43

26:26.820 -> SL Pressure: 1021.69

26:26.820 -> 

26:26.820 -> 

26:26.820 -> Waking up the dust sensor...

26:26.820 -> Reading will be done 40s later.

26:26.820 ->