I know there are several threads posted on radio range, but many of them seem to be related to configuration issues, and I don't think that is my problem.
I've set up both the node and the Gateway example sketches, configured the correct frequency 868 MHz and defined IS_RFM69HW. I chose to disable the ATC version since I will be moving around testing the range. I use the simple wire monopole 1/4 wave antennas with a length of approximately 86 mm. I have not set the power setting explicitly, but as far as I can see it should be at the maximum 31 by default.
I leave the node on my desk on the first floor in a house constructed using solid timber, with several windows in the room. I plugged the Gateway into my laptop and move around outside to check whether I receive any messages and the associated signal strength.
Inside the house the signal seems quite good, dropping down to around -50 at the other end of the house. Moving outside I get the same signal strength right outside my wall, but as soon as I move a few metres away the signal disappears completely. I then have to move a further 30 m away which more or less brings the line of sight between the node and the gateway through the window as opposed to the timber wall. What are is a site at this point is around -65. I then move into my barn which is around 50 m from the house and made of wood as well. Inside here the connection is intermittent with multiple lost packets and signal strengths down to -78.
Is this the expected behaviour from the HW radio? I seem not to be able to get further away from the house than around 50 to 60 m in most directions, a bit further in one direction. I do not have windows on all sides of the room, which means that in some directions the line of sight assumption from the previous paragraph falls to pieces.
Could this be an issue with the antennas that are quite simplistic, are the wooden walls really blocking the signal that much, have I configured the radio is wrong? Could there be issues with radio interference outside from sources I am unaware of? Is it necessary to do something with the bit rate or other configuration parameters to increase the signal range?
The several reports of the beginning of this forum related to range, but most of them deal with getting a maximum possible range at the cost of reduced bit rate. How far should I expect to reach without making any changes, and what changes do I need to make to get as far as I need? Also, do have to make these changes on all radios in the network, or can the gateway communicate at a higher data rate with other nodes simultaneously?
As you can see I have a bunch of questions but few answers. Any enlightenment would be very helpful :-)
Thanks.