@Boots33 Thanks for advice! I will definitely get some extra non amplified nrf modules and think about having a separate power supply for my radio.

@Boots33 Thanks for such a detailed answer!

I power my radio from the arduino unfortunately. Also I don't have other radio modules to test my project with. The distance between the node and the gateway is about 3m so it shouldn't be a problem. I covered my radios with foil to lower the interference. None of that really helped.

There was one thing that actually worked. I have a sensor connected to the gateway that reads the temperature and sends it to itself. I use a serial-gateway to feed the data to the openhab installed on my pc. Once I disconnected this sensors from the gateway (so there is only one sensor total, on the node) everything worked fine :confused: I assume there was an interference with gateway's own messages. I thought that it was possible to have sensors connected to gateway but when I do so the connection becomes unstable.
P.S. I also installed 47uF capacitor to the gateway, just in case.

I've been trying to set the connection for a good while already but I keep facing multiple problems. I use 10uF caps instead of 4,7uF recommended. I also use nRF24L01+PA+LNa version. I assign a static node id to both the gateway (I have a sensor connected) and to the node.

Here is the log

72816 TSM:FAIL:RE-INIT
72818 TSM:INIT
72825 TSM:INIT:TSP OK
72827 TSM:INIT:STATID=7
72829 TSF:SID:OK,ID=7
72832 TSM:FPAR
72868 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
74876 !TSM:FPAR:NO REPLY
74878 TSM:FPAR
74915 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
76922 !TSM:FPAR:NO REPLY
76924 TSM:FPAR
76960 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
78968 !TSM:FPAR:NO REPLY
78970 TSM:FPAR
79006 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
81014 !TSM:FPAR:FAIL
81015 TSM:FAIL:CNT=5
81017 TSM:FAIL:PDT
91020 TSM:FAIL:RE-INIT
91022 TSM:INIT
91029 TSM:INIT:TSP OK
91031 TSM:INIT:STATID=7
91033 TSF:SID:OK,ID=7
91035 TSM:FPAR
91072 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
93079 !TSM:FPAR:NO REPLY
93081 TSM:FPAR
93117 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
95125 !TSM:FPAR:NO REPLY
95127 TSM:FPAR
95163 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
97171 !TSM:FPAR:NO REPLY
97173 TSM:FPAR
97209 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
99217 !TSM:FPAR:FAIL
99218 TSM:FAIL:CNT=6
99220 TSM:FAIL:PDT
109223 TSM:FAIL:RE-INIT
109225 TSM:INIT
109233 TSM:INIT:TSP OK
109235 TSM:INIT:STATID=7
109237 TSF:SID:OK,ID=7
109240 TSM:FPAR
109276 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
109739 TSF:MSG:READ,0-0-7,s=255,c=3,t=8,pt=1,l=1,sg=0:0
109744 TSF:MSG:FPAR OK,ID=0,D=1
110668 TSF:MSG:READ,0-0-7,s=255,c=3,t=8,pt=1,l=1,sg=0:0
111284 TSM:FPAR:OK
111285 TSM:ID
111287 TSM:ID:OK
111288 TSM:UPL
111292 TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1
111503 TSF:MSG:READ,0-0-7,s=255,c=3,t=8,pt=1,l=1,sg=0:0
111508 !TSF:MSG:FPAR INACTIVE
111520 TSF:MSG:READ,0-0-7,s=255,c=3,t=25,pt=1,l=1,sg=0:1
111525 TSF:MSG:PONG RECV,HP=1
111528 TSM:UPL:OK
111531 TSM:READY:ID=7,PAR=0,DIS=1
111535 TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0100
113544 TSF:MSG:SEND,7-7-0-0,s=255,c=0,t=17,pt=0,l=10,sg=0,ft=0,st=OK:2.1.0-beta
113552 TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=6,pt=1,l=1,sg=0,ft=0,st=OK:0
Send Sketch Info: 
115598 !TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=11,pt=0,l=10,sg=0,ft=0,st=NACK:RADIOTEST 
115642 !TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=12,pt=0,l=2,sg=0,ft=1,st=NACK:v1
RADIOTEST v1
Get Config: Metric
Presenting Nodes
________________
  S_TEMP
116691 !TSF:MSG:SEND,7-7-0-0,s=1,c=0,t=6,pt=0,l=16,sg=0,ft=2,st=NACK:House Temperarue
________________
116750 MCO:REG:REQ
116788 !TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=3,st=NACK:2
118830 !TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=4,st=NACK:2
120871 !TSF:MSG:SEND,7-7-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=5,st=NACK:2
120879 !TSM:READY:UPL FAIL,SNP
120882 TSM:FPAR
120918 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=6,st=OK:
122880 !TSF:SND:TNR
122926 !TSM:FPAR:NO REPLY
122928 TSM:FPAR
122964 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
126882 !TSM:FPAR:NO REPLY
126884 TSM:FPAR
126921 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
128928 !TSM:FPAR:NO REPLY
128930 TSM:FPAR
128967 TSF:MSG:SEND,7-7-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
130974 !TSM:FPAR:FAIL
130976 TSM:FAIL:CNT=1
130978 TSM:FAIL:PDT
140981 TSM:FAIL:RE-INIT

Some times I do have a connection but it usually doesn't last for a long time. Here is my gateway log:

0;255;3;0;9;MCO:BGN:INIT GW,CP=RNNGA--,VER=2.1.0-beta
0;255;3;0;9;TSM:INIT
0;255;3;0;9;TSF:WUR:MS=0
0;255;3;0;9;TSM:INIT:TSP OK
0;255;3;0;9;TSM:INIT:GW MODE
0;255;3;0;9;TSM:READY:ID=0,PAR=0,DIS=0
0;255;0;0;18;2.1.0-beta
0;2;0;0;6;
0;255;3;0;14;Gateway startup complete.
0;255;0;0;18;2.1.0-beta
0;2;0;0;6;
0;255;3;0;9;MCO:BGN:STP
0;255;3;0;9;MCO:BGN:INIT OK,TSP=1
Temperature is: 28.06
0;2;1;0;0;28.06
0;255;3;0;9;TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0:
0;255;3;0;9;TSF:MSG:BC
0;255;3;0;9;TSF:MSG:FPAR REQ,ID=7
0;255;3;0;9;TSF:PNG:SEND,TO=0
0;255;3;0;9;TSF:CKU:OK
0;255;3;0;9;TSF:MSG:GWL OK
0;255;3;0;9;!TSF:MSG:SEND,0-0-7-7,s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=NACK:0
0;255;3;0;9;MCO:BGN:INIT GW,CP=RNNGA--,VER=2.1.0-beta
0;255;3;0;9;TSM:INIT
0;255;3;0;9;TSF:WUR:MS=0
0;255;3;0;9;TSM:INIT:TSP OK
0;255;3;0;9;TSM:INIT:GW MODE
0;255;3;0;9;TSM:READY:ID=0,PAR=0,DIS=0
0;255;0;0;18;2.1.0-beta
0;2;0;0;6;
0;255;3;0;14;Gateway startup complete.
0;255;0;0;18;2.1.0-beta
0;2;0;0;6;
0;255;3;0;9;MCO:BGN:STP
0;255;3;0;9;MCO:BGN:INIT OK,TSP=1
Temperature is: 28.13
0;2;1;0;0;28.13

Any help would be appreciated!

@npiot There are three dots near the "reply" and "quote" buttons. Go there and find "edit" tool. Then simply modify the title and press "Submit".

@AWI Did you find the solution?

Fixed by switching 4.7uF capacitors with 10uF capacitors.

Unable to connect the node to my gateway.
I use "MockMySensors" sketch with these additional lines

#define MY_NODE_ID 17
#define MY_PARENT_NODE_ID  0
#define MY_PARENT_NODE_IS_STATIC

I also use "GatewaySerial" sketch for my gateway.
Here is what I get in debug

TSM:PDT
TSM:INIT
TSM:RADIO:OK
TSP:ASSIGNID:OK (ID=17)
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
!TSM:FPAR:FAIL
!TSM:FAILURE
TSM:PDT
TSM:INIT
TSM:RADIO:OK
TSP:ASSIGNID:OK (ID=17)
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSP:MSG:READ 0-0-17 s=255,c=3,t=8,pt=1,l=1,sg=0:0
TSP:MSG:FPAR RES (ID=0, dist=0)
TSP:MSG:FPAR (PPAR FOUND)
TSP:MSG:PAR OK (ID=0, dist=1)
TSM:FPAR:OK
TSM:ID
TSM:CHKID:OK (ID=17)
TSM:UPL
TSP:PING:SEND (dest=0)
!TSP:MSG:SEND 17-17-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=fail:1
TSP:CHKUPL:FAIL (hops=255)
!TSM:UPL:FAIL
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSP:MSG:READ 0-0-17 s=255,c=3,t=8,pt=1,l=1,sg=0:0
TSP:MSG:FPAR RES (ID=0, dist=0)
TSP:MSG:FPAR (PPAR FOUND)
TSP:MSG:PAR OK (ID=0, dist=1)
TSM:FPAR:OK
TSM:ID
TSM:CHKID:OK (ID=17)
TSM:UPL
TSP:PING:SEND (dest=0)
!TSP:MSG:SEND 17-17-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=fail:1
TSP:CHKUPL:FAIL (hops=255)
!TSM:UPL:FAIL
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSP:MSG:READ 0-0-17 s=255,c=3,t=8,pt=1,l=1,sg=0:0
TSP:MSG:FPAR RES (ID=0, dist=0)
TSP:MSG:FPAR (PPAR FOUND)
TSP:MSG:PAR OK (ID=0, dist=1)
TSM:FPAR:OK
TSM:ID
TSM:CHKID:OK (ID=17)
TSM:UPL
TSP:PING:SEND (dest=0)
!TSP:MSG:SEND 17-17-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=fail:1
TSP:CHKUPL:FAIL (hops=255)
!TSM:UPL:FAIL
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 17-17-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:

0;255;3;0;9;Starting gateway (RNNGA-, 2.0.0)
0;255;3;0;9;TSM:INIT
0;255;3;0;9;TSM:RADIO:OK
0;255;3;0;9;TSM:GW MODE
0;255;3;0;9;TSM:READY
0;255;3;0;14;Gateway startup complete.
0;255;0;0;18;2.0.0
0;255;3;0;9;No registration required
0;255;3;0;9;Init complete, id=0, parent=0, distance=0, registration=1```