SCD 40 not working with 14.6.0-Sensors; can´t enable driver

[Der-Rote-Graf]

Hi,

in the past i used successfully some SCD40 Sensirion with Wemos D1 (i use a separate 3,3V regulator)

I´m working on a new project now and want to use a SCD40 again (one of the working sensors )but i cant get them working anymore...

-I´m at Tasmota 14.6.0 Sensors Release
-The Sensor is recognized via "I2cScan" at 0x62 as expected
-"I2cDriver" gives {"I2CDriver":"7,8,9,10,11,12,13,14,15,17,18,20,24,29,31,36,41,42,44,46,48,69,76,89"} back
-Value 62 is not present, so i try to enable it with "I2cDriver62 1".

17:55:06.641 CMD: i2cscan
17:55:06.678 MQT: stat/tasmota_EDAFC5/RESULT = {"I2CScan":"Device(s) found at 0x62"}
17:55:10.227 CMD: i2cdriver
17:55:10.237 MQT: stat/tasmota_EDAFC5/RESULT = {"I2CDriver":"7,8,9,10,11,12,13,14,15,17,18,20,24,29,31,36,41,42,44,46,48,69,76,89"}
17:55:16.810 CMD: i2cdriver62 1
17:55:16.821 MQT: stat/tasmota_EDAFC5/RESULT = {"I2CDriver":"7,8,9,10,11,12,13,14,15,17,18,20,24,29,31,36,41,42,44,46,48,69,76,89"}

After 3 or 4 seconds the controller performs a reboot and everything is exactly as before. I dont have any idea what else i can try...
"SetSensor62"
The Sensors are working fine when i connect them to an existing Wemos d1 with tasmota. I Just cant get the new one working.

The project contains 2 more sensors but on the breadboard here is just the SCD40 present
Maybe someone has an advice.

thanks and best regards,

Thomas

Result "Backlog Template; Module; GPIO 255":

> 17:36:56.083 MQT: stat/tasmota_EDAFC5/RESULT = {"NAME":"Generic","GPIO":[1,1,1,1,1,1,1,1,1,1,1,1,1,1],"FLAG":0,"BASE":18}
> 17:36:56.298 MQT: stat/tasmota_EDAFC5/RESULT = {"Module":{"18":"Generic"}}
> 17:36:56.560 MQT: stat/tasmota_EDAFC5/RESULT = {"GPIO0":{"AM2301":1216},"GPIO1":{"None":0},"GPIO2":{"Relay2":225},"GPIO3":{"None":0},"GPIO4":{"I2C SDA":640},"GPIO5":{"I2C SCL":608},"GPIO9":{"None":0},"GPIO10":{"None":0},"GPIO12":{"Relay3":226},"GPIO13":{"Relay4":227},"GPIO14":{"Relay2":225},"GPIO15":{"Relay5":228},"GPIO16":{"Relay1":224},"GPIO17":{"None":0}}
> 17:37:22.237 MQT: tele/tasmota_EDAFC5/STATE = {"Time":"2025-05-13T17:37:22","Uptime":"0T00:05:11","UptimeSec":311,"Heap":20,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER1":"ON","POWER2":"ON","POWER3":"ON","POWER4":"ON","POWER5":"ON","Wifi":{"AP":1,"SSId":"","Channel":1,"Mode":"11n","RSSI":82,"Signal":-59,"LinkCount":1,"Downtime":"0T00:00:05"}}
> 17:37:22.272 MQT: tele/tasmota_EDAFC5/SENSOR = {"Time":"2025-05-13T17:37:22","AM2301":{"Temperature":null,"Humidity":null,"DewPoint":null},"TempUnit":"C"}

Result "Status 0"

17:43:03.240 CMD: status 0
17:43:03.250 MQT: stat/tasmota_EDAFC5/STATUS = {"Status":{"Module":18,"DeviceName":"","FriendlyName":["","","","",""],"Topic":"tasmota_EDAFC5","ButtonTopic":"0","Power":"11111","PowerLock":"00000","PowerOnState":3,"LedState":1,"LedMask":"FFFF","SaveData":1,"SaveState":1,"SwitchTopic":"0","SwitchMode":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"ButtonRetain":0,"SwitchRetain":0,"SensorRetain":0,"PowerRetain":0,"InfoRetain":0,"StateRetain":0,"StatusRetain":0}}
17:43:03.255 MQT: stat/tasmota_EDAFC5/STATUS1 = {"StatusPRM":{"Baudrate":115200,"SerialConfig":"8N1","GroupTopic":"tasmotas","OtaUrl":"http://ota.tasmota.com/tasmota/release/tasmota-sensors.bin.gz","RestartReason":"Software/System restart","Uptime":"0T00:10:52","StartupUTC":"2025-05-13T16:32:11","Sleep":50,"CfgHolder":4617,"BootCount":76,"BCResetTime":"2025-05-11T09:32:00","SaveCount":284,"SaveAddress":"F4000"}}
17:43:03.260 MQT: stat/tasmota_EDAFC5/STATUS2 = {"StatusFWR":{"Version":"14.6.0(release-sensors)","BuildDateTime":"2025-04-16T11:17:47","Boot":31,"Core":"2_7_8","SDK":"2.2.2-dev(38a443e)","CpuFrequency":80,"Hardware":"ESP8266EX","CR":"406/699"}}
17:43:03.266 MQT: stat/tasmota_EDAFC5/STATUS3 = {"StatusLOG":{"SerialLog":2,"WebLog":2,"MqttLog":4,"SysLog":0,"LogHost":"","LogPort":514,"SSId":["",""],"TelePeriod":300,"Resolution":"558180C0","SetOption":["00000009","2805C80001000600003C5A0A192800000000","00000080","00006000","00004000","00000000"]}}
17:43:03.288 MQT: stat/tasmota_EDAFC5/STATUS4 = {"StatusMEM":{"ProgramSize":721,"Free":280,"Heap":18,"ProgramFlashSize":1024,"FlashSize":4096,"FlashChipId":"16405E","FlashFrequency":40,"FlashMode":"DOUT","Features":["0809","8F9A8787","0415A005","B7F7BFCF","05DA9BC4","64367CC7","00084052","20000000","54000020","0008C081","00000000"],"Drivers":"1,2,!3,!4,!5,!6,7,!8,9,10,12,!14,!16,!17,!20,!21,!24,29,!34,62,!65,!66,!68","Sensors":"!1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,17,18,19,20,21,22,26,31,34,37,39,40,42,43,45,51,52,55,56,58,59,62,64,66,67,74,98,103,105","I2CDriver":"7,8,9,10,11,12,13,14,15,17,18,20,24,29,31,36,41,42,44,46,48,69,76,89"}}
17:43:03.317 MQT: stat/tasmota_EDAFC5/STATUS10 = {"StatusSNS":{"Time":"2025-05-13T17:43:03","AM2301":{"Temperature":null,"Humidity":null,"DewPoint":null},"TempUnit":"C"}}
17:43:03.325 MQT: stat/tasmota_EDAFC5/STATUS11 = {"StatusSTS":{"Time":"2025-05-13T17:43:03","Uptime":"0T00:10:52","UptimeSec":652,"Heap":16,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER1":"ON","POWER2":"ON","POWER3":"ON","POWER4":"ON","POWER5":"ON","","Channel":1,"Mode":"",:-59,"LinkCount":1,"Downtime":"0T00:00:05"}}}

[sfromis]

As documented, the SCD40 driver is not included in the sensors build, and the I2CDriver command does not facilitate adding new drivers.
https://tasmota.github.io/docs/BUILDS/
(And no, it is not a recent change)

[Der-Rote-Graf]

Ahh thats why i compiled it myself in the past....
Thanks for the quick reply!

[Noschvie]

Have you ever thought about using an ESP32 D1 mini with precompiled Tasmota?