Hi @VClar.1​, unfortunately I couldn't achieve satisfying BER results with 4GFSK and more than 100kbps (76.8 kbps was the max), while higher DR (up to 250kbps) and low BER was affordable with 2FSK only.

Have the same problem. Setting the 500kbps and 4(G)FSK modulations in bare-metal example makes that two S2LP based boards (STEVAL-FKI868v2) do not see each other packets. Trying to set these parameters in S2-LP DK GUI does not work - as @allard menti...