Questions

About the Linear Potentiometer: In the Product Details says: "For best results, use as a potential divider (not variable resistor) and buffer the resulting output with a high impedance amplifier" Should I use a TL081 or a OPA341-¿OPA2341? In fact, People in IRC suggested me to "use a single supply rail-to-rail CMOS op-amp instead." because "THose also have a very high input impedance"; for example The OPA2341.
The whole thing about use a regular rotary potentiometer.

Solved

I'm not using ® or ™ all the time because of this
Despite here doesn't say anything about single channel nature, I think it really it is, for instance, LG-01 gateway it is, and it does mount that chip. CONFIRMED IN HERE
This arduino-lorawan library apparently provides a more friendly interface between LoRa physical layer and TTN stack (which uses LoRaWAN protocol), however I'm using arduino-lmic which is in fact a dependency for arduino-lorawan.
Differences between ABP and OTAA devices here and here

Disable delete button when do click outside of listbox (except on Delete button). I'd like a way to deselect the chosen element in listbox without delete it.
Celan labels once a node is added. Maybe it should be interesting to add more columns to the list.
The possibility to specify the orionCB, QL and IoTagent urls.

In order to get the CrateDB container working properly you have to set the vm.max_map_count to 262144 for systemd. This can be done by running

sudo sysctl -w vm.max_map_count=262144

As you can see in CrateDB documentation
Also CrateDB docker container exposes the 5432 post for PostgreSQL protocol as can be seen here