CO2 S8 sensor not found in O-1PST

h.mayorquin · April 28, 2024, 3:46pm

Hi, I am getting a failure on the detection of the S8 Sensor. I am wondering if someone can help me to troubleshoot.

The full log:

*wm:AutoConnect: SUCCESS 
*wm:STA IP Address: 192.168.68.104
Webserver init: airgradient_84fce606f490.local
Post payload: {"wifi":-48,"boot":0}
WiFi connected!
IP address: 
192.168.68.104
Get server config: {"country":"MX","pmStandard":"ugm3","co2CalibrationRequested":false,"ledBarTestRequested":false,"ledBarMode":"off","displayMode":"on","placeOpen":true,"abcDays":8,"tvocLearningOffset":12,"noxLearningOffset":12,"temperatureUnit":"c","targetFirmware":"3.1.0","model":"O-1PST"}
Server configuration: 
inF: false
inUSAQI: false
useRGBLedBar: 0
Model: O-1PST
MQTT Broker: 
S8 calibration period: 8
Guru Meditation Error: Core  0 panic'ed (Load access fault). Exception was unhandled.

Core  0 register dump:
MEPC    : 0x4201cff2  RA      : 0x4201e970  SP      : 0x3fca0f20  GP      : 0x3fc8f800  
TP      : 0x3fc71844  T0      : 0x7fffffff  T1      : 0x4038d5b0  T2      : 0xffffffff  
S0/FP   : 0x3fc9d0b4  S1      : 0x3fc99420  A0      : 0x00000000  A1      : 0x00000000  
A2      : 0x3fcad4dc  A3      : 0x00000001  A4      : 0x3fc9975c  A5      : 0x00000001  
A6      : 0x3fe00000  A7      : 0x00000113  S2      : 0x00000001  S3      : 0x00000000  
S4      : 0x3fc93000  S5      : 0x3fc99000  S6      : 0x3fc92e6c  S7      : 0x3fc99000  
S8      : 0x3c0e2000  S9      : 0x3c0e13f4  S10     : 0x3fc93000  S11     : 0x00000000  
T3      : 0x0000005c  T4      : 0x00000000  T5      : 0x00000000  T6      : 0x20746547  
MSTATUS : 0x00001881  MTVEC   : 0x40380001  MCAUSE  : 0x00000005  MTVAL   : 0x00000004  
MHARTID : 0x00000000  

Stack memory:
3fca0f20: 0x3fc92e6c 0x3fc99420 0x3fca0f98 0x00000000 0x00000001 0x3fc99420 0x3fc94000 0x42006a8e
3fca0f40: 0x3c0e7e5c 0x3fcESP-ROM:esp32c3-api1-20210207
Build:Feb  7 2021
rst:0x7 (TG0WDT_SYS_RST),boot:0xc (SPI_FAST_FLASH_BOOT)
Saved PC:0x4203795e
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fcd5810,len:0x438
load:0x403cc710,len:0x918
load:0x403ce710,len:0x25f4
entry 0x403cc710
Serial nr: 84fce606f490
Detect OPEN_AIR
Server configuration: 
inF: false
inUSAQI: false
useRGBLedBar: 0
Model: O-1PST
MQTT Broker: 
S8 calibration period: -1
Firmware Version: 3.0.9
Can not detect S8 on Serial1, try on Serial0
CO2 S8 sensor not found
Can not detect S8 run mode 'PPT'
Found PMS 1 on Serial0
PMS2 sensor not found
Firmware Mode: O-1PPT
Connecting to WiFi...
*wm:AutoConnect 
*wm:Connecting to SAVED AP: ElInternet 
*wm:connectTimeout not set, ESP waitForConnectResult... 
*wm:AutoConnect: SUCCESS 
*wm:STA IP Address: 192.168.68.104
Webserver init: airgradient_84fce606f490.local
Post payload: {"wifi":-48,"boot":0}
Post response failed code: -11
WiFi connected!
IP address: 
192.168.68.104
Get server config: {"country":"MX","pmStandard":"ugm3","co2CalibrationRequested":false,"ledBarTestRequested":false,"ledBarMode":"off","displayMode":"on","placeOpen":true,"abcDays":8,"tvocLearningOffset":12,"noxLearningOffset":12,"temperatureUnit":"c","targetFirmware":"3.1.0","model":"O-1PST"}
Server configuration: 
inF: false
inUSAQI: false
useRGBLedBar: 0
Model: O-1PST
MQTT Broker: 
S8 calibration period: 8
Guru Meditation Error: Core  0 panic'ed (Load access fault). Exception was unhandl

Here is a photo of my connections:

Thanks in advance,

h.mayorquin · April 28, 2024, 4:04pm

Just to add, the connections I got from:
https://www.airgradient.com/documentation/open-air-pst-kit-1-3/

And I also followed this related thread:

Achim_AirGradient · April 29, 2024, 2:56pm

Which firmware version are you on?

h.mayorquin · April 29, 2024, 5:14pm

Any way I can check this directly?
Two facts:

I flashed the last version from here: The AirGradient Open Air Outdoor Air Quality Monitor (O-1PST Kit, PCB Version 1.3)
I bought the Open Air Outdoor Monitor O-1PST CO2 Version (Kit) on February 20th from your webiste.

Thanks for answering and any help you can provide!

Achim_AirGradient · April 29, 2024, 5:31pm

Please send me your place ID that you can see here: AirGradient

h.mayorquin · April 30, 2024, 9:34pm

This is what I found in the page that you linked (I am writing this because of the 20 character limit).
Place ID: 5859

Achim_AirGradient · May 1, 2024, 11:18am

I looked at the dashboard but all looks fine. It seems you only get TVOCs sometime. Can you try and use a different power adapter?

If that does not help, please send more photos.

h.mayorquin · May 4, 2024, 5:30pm

I tried using a different power source, I also tried connecting it to the computer with the cable that came wit hthe pakcage. No luck, also now it seems that I don’t get the data of PM to the dashboard either : /

More photos, let me know if you anyhintg else could be useful:

And the latest logs:
Processing: esp-web-tools-logs.txt…


TVOC index: 89
TVOC raw: 29630
NOx index: 1
NOx raw: 16698

[1] PM1 ug/m3: 22
[1] PM2.5 ug/m3: 33
[1] PM10 ug/m3: 35
[1] PM3.0 Count: 4080
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 90
TVOC raw: 29623
NOx index: 1
NOx raw: 16692

TVOC index: 90
TVOC raw: 29624
NOx index: 1
NOx raw: 16693

[1] PM1 ug/m3: 22
[1] PM2.5 ug/m3: 32
[1] PM10 ug/m3: 34
[1] PM3.0 Count: 4017
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 91
TVOC raw: 29624
NOx index: 1
NOx raw: 16686

TVOC index: 91
TVOC raw: 29621
NOx index: 1
NOx raw: 16679

TVOC index: 92
TVOC raw: 29621
NOx index: 1
NOx raw: 16673

[1] PM1 ug/m3: 22
[1] PM2.5 ug/m3: 32
[1] PM10 ug/m3: 34
[1] PM3.0 Count: 4017
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 92
TVOC raw: 29621
NOx index: 1
NOx raw: 16673

[1] PM1 ug/m3: 22
[1] PM2.5 ug/m3: 32
[1] PM10 ug/m3: 33
[1] PM3.0 Count: 4038
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 92
TVOC raw: 29624
NOx index: 1
NOx raw: 16669

TVOC index: 93
TVOC raw: 29617
NOx index: 1
NOx raw: 16667

TVOC index: 93
TVOC raw: 29638
NOx index: 1
NOx raw: 16656

[1] PM1 ug/m3: 22
[1] PM2.5 ug/m3: 32
[1] PM10 ug/m3: 35
[1] PM3.0 Count: 4050
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 94
TVOC raw: 29622
NOx index: 1
NOx raw: 16650

[1] PM1 ug/m3: 21
[1] PM2.5 ug/m3: 30
[1] PM10 ug/m3: 32
[1] PM3.0 Count: 3918
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 94
TVOC raw: 29627
NOx index: 1
NOx raw: 16648

TVOC index: 94
TVOC raw: 29624
NOx index: 1
NOx raw: 16627

[1] PM1 ug/m3: 21
[1] PM2.5 ug/m3: 30
[1] PM10 ug/m3: 32
[1] PM3.0 Count: 3918
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 94
TVOC raw: 29634
NOx index: 1
NOx raw: 16629

TVOC index: 95
TVOC raw: 29631
NOx index: 1
NOx raw: 16625

[1] PM1 ug/m3: 21
[1] PM2.5 ug/m3: 30
[1] PM10 ug/m3: 33
[1] PM3.0 Count: 3867
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 95
TVOC raw: 29620
NOx index: 1
NOx raw: 16618

TVOC index: 95
TVOC raw: 29634
NOx index: 1
NOx raw: 16613

[1] PM1 ug/m3: 21
[1] PM2.5 ug/m3: 31
[1] PM10 ug/m3: 33
[1] PM3.0 Count: 3783
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 95
TVOC raw: 29628
NOx index: 1
NOx raw: 16605

TVOC index: 95
TVOC raw: 29628
NOx index: 1
NOx raw: 16605

[1] PM1 ug/m3: 21
[1] PM2.5 ug/m3: 32
[1] PM10 ug/m3: 34
[1] PM3.0 Count: 3828
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 96
TVOC raw: 29621
NOx index: 1
NOx raw: 16608

TVOC index: 96
TVOC raw: 29619
NOx index: 1
NOx raw: 16601

[1] PM1 ug/m3: 20
[1] PM2.5 ug/m3: 31
[1] PM10 ug/m3: 35
[1] PM3.0 Count: 3897
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 96
TVOC raw: 29623
NOx index: 1
NOx raw: 16596

TVOC index: 96
TVOC raw: 29621
NOx index: 1
NOx raw: 16585

[1] PM1 ug/m3: 20
[1] PM2.5 ug/m3: 31
[1] PM10 ug/m3: 35
[1] PM3.0 Count: 3897
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

TVOC index: 97
TVOC raw: 29612
NOx index: 1
NOx raw: 16583

TVOC index: 97
TVOC raw: 29626
NOx index: 1
NOx raw: 16580
Post payload: {"wifi":-44,"channels":{"1":{"pm01":20,"pm02":31,"pm10":35,"pm003_count":3897,"atmp":25.36,"rhum":52}},"tvoc_index":97,"tvoc_raw":29626,"nox_index":1,"nox_raw":16580,"boot":1}
Post response failed code: 400

[1] PM1 ug/m3: 21
[1] PM2.5 ug/m3: 32
[1] PM10 ug/m3: 36
[1] PM3.0 Count: 3891
[1] Temperature in C: 25.36
[1] Relative Humidity: 52

Achim_AirGradient · May 5, 2024, 9:23am

Can you please send a longer log where we can see the unit starting up?

h.mayorquin · May 5, 2024, 4:28pm

Serial nr: 84fce606f490
Detect OPEN_AIR
Server configuration: 
inF: false
inUSAQI: false
useRGBLedBar: 2
Model: O-1PST
MQTT Broker: 
S8 calibration period: -1
Firmware Version: 3.0.9
Can not detect S8 on Serial1, try on Serial0
CO2 S8 sensor notFound PMS 1 on Serial0
PMS2 sensor not found
Firmware Mode: O-1PPT
Connecting to WiFi...
*wm:AutoConnect 
*wm:Connecting to SAVED AP: ElInternet 
*wm:connectTimeout not set, ESP waitForConnectResult... 
*wm:AutoConnect: SUCCESS 
*wm:STA IP Address: 192.168.68.107
Webserver init: airgradient_84fce606f490.local
Post payload: {"wifi":-43,"boot":0}
WiFi connected!
IP address: 
192.168.68.107
Get server config: {"country":"MX","pmStandard":"ugm3","co2CalibrationRequested":false,"ledBarTestRequested":false,"ledBarMode":"co2","displayMode":"on","placeOpen":true,"abcDays":30,"tvocLearningOffset":12,"noxLearningOffset":12,"temperatureUnit":"c","targetFirmware":"3.1.0","ledbarBrightness":100,"displayBrightness":100,"model":"O-1PST"}
Server configuration: 
inF: false
inUSAQI: false
useRGBLedBar: 2
Model: O-1PST
MQTT Broker: 
S8 calibration period: 30
Get server config: {"country":"MX","pmStandard":"ugm3","co2CalibrationRequested":false,"ledBarTestRequested":false,"ledBarMode":"co2","displayMode":"on","placeOpen":true,"abcDays":30,"tvocLearningOffset":12,"noxLearningOffset":12,"temperatureUnit":"c","targetFirmware":"3.1.0","ledbarBrightness":100,"displayBrightness":100,"model":"O-1PST"}
Server configuration: 
inF: false
inUSAQI: false
useRGBLedBar: 2
Model: O-1PST
MQTT Broker: 
S8 calibration period: 30
CO2 S8 not available, set 'abcDays' ignored

[1] PM1 ug/m3: 27
[1] PM2.5 ug/m3: 39
[1] PM10 ug/m3: 46
[1] PM3.0 Count: 0
[1] Temperature in C: 24.65
[1] Relative Humidity: 53

TVOC index: 0
TVOC raw: 29108
NOx index: 0
NOx raw: 16222

TVOC index: 0
TVOC raw: 29185
NOx index: 0
NOx raw: 16198

[1] PM1 ug/m3: 25
[1] PM2.5 ug/m3: 38
[1] PM10 ug/m3: 44
[1] PM3.0 Count: 5328
[1] Temperature in C: 24.65
[1] Relative Humidity: 54

TVOC index: 0
TVOC raw: 29257
NOx index: 0
NOx raw: 16177

TVOC index: 0
TVOC raw: 29323
NOx index: 0
NOx raw: 16161

[1] PM1 ug/m3: 26
[1] PM2.5 ug/m3: 39
[1] PM10 ug/m3: 46
[1] PM3.0 Count: 5313
[1] Temperature in C: 24.77
[1] Relative Humidity: 54

TVOC index: 0
TVOC raw: 29376
NOx index: 0
NOx raw: 16151

TVOC index: 0
TVOC raw: 29428
NOx index: 0
NOx raw: 16136

[1] PM1 ug/m3: 26
[1] PM2.5 ug/m3: 39
[1] PM10 ug/m3: 45
[1] PM3.0 Count: 5211
[1] Temperature in C: 24.77
[1] Relative Humidity: 54

TVOC index: 0
TVOC raw: 29469
NOx index: 0
NOx raw: 16134

TVOC index: 0
TVOC raw: 29512
NOx index: 0
NOx raw: 16126

[1] PM1 ug/m3: 26
[1] PM2.5 ug/m3: 39
[1] PM10 ug/m3: 45
[1] PM3.0 Count: 5238
[1] Temperature in C: 24.77
[1] Relative Humidity: 54

Achim_AirGradient · May 6, 2024, 1:30am

I think it might be a faulty CO2 module. Please contact our support through the website form to get you a replacement.
https://www.airgradient.com/support/