Sure, there is already the KiCAD file including everything to play around with on your own; added a picture of the schematic here for a quick glance without downloading.
There are also other solutions that have I2C bus pins on the shield and if you are going to make a battery powered node, I'd suggest to use an I2C sensor as it will be much more battery friendly
@DeepCore not wrong frequency no. But it looks like the feather doesn’t come with the antenna pre-soldered. Since the devices should be identical otherwise, the antenna could be what differs. But if it was, the rssi would probably have been different as well.
