For specific gas sensors, I usually tell IoT people to look at SPEC sensors.
These sensors do not have heating element in them making them good for battery-powered IoT devices. Interfaces are UART and ADC so you can directly connect it to the headers if WisBlock Base RAK5005-O.
In case you want to add more sensors that require more pins, you can always use WisBlock adapter/extender modules.
We will be launching two more IO adapater/extender modules next week in WisBlock Week which are in standard 2.54mm pitch header connectors.
I cannot find a datasheet for the Oxygen sensor 4OXV. The information on Aliexpress is not very detailed. I do not know if this sensor can be connected to WisBlock.
We do not have an Oxygen sensor in our module plan yet, but if you can find a sensor with a proper datasheet and more detailed information, I might be able to answer you if it can be used with WisBlock.
I can fully understand that you only support RAKwireless products but I also need to know what type of sensor or better yet, what type of connection, does my sensor need to have in order to be able to connect to the WisBlock. This information is related to the RAK product itself, not the third-party sensor.
I have managed to get the technical data from a company selling such sensors so please take a look:
Again, thank you for your support, I really appreciate it.