I currently have a couple of MySensors boards with Arduino Pro Mini + nRF24 radios communicating with a Raspberry Pi Gateway.

Today, I wanted to add a new sensor to my network (moisture level sensor). I placed on my protoboard the Arduino Pro Mini, a DCDC boost, a connector for the 2xAA battery and the nRF24L01+, connected as described here: https://www.mysensors.org/build/connect_radio

When I power my sensor, messages seem to be transmitted to the gateway but the sensor seems stuck at the find parents state (from my understanding). As I already have running sensors, I assume the gateway is working fine.

Here is the logs on the sensor side :

108560 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
110569 !TSM:FPAR:NO REPLY
110571 TSM:FPAR
110575 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
112584 !TSM:FPAR:NO REPLY
112586 TSM:FPAR
112590 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
114601 !TSM:FPAR:NO REPLY
114604 TSM:FPAR
114608 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
116617 !TSM:FPAR:FAIL
116619 TSM:FAIL:CNT=7
116621 TSM:FAIL:DIS
116623 TSF:TDI:TSL
176627 TSM:FAIL:RE-INIT
176629 TSM:INIT
176635 TSM:INIT:TSP OK
176640 TSM:INIT:STATID=40
176642 TSF:SID:OK,ID=40
176644 TSM:FPAR
176650 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
178659 !TSM:FPAR:NO REPLY
178661 TSM:FPAR
178665 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
180674 !TSM:FPAR:NO REPLY
180676 TSM:FPAR
180680 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
182689 !TSM:FPAR:NO REPLY
182691 TSM:FPAR
182695 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
184705 !TSM:FPAR:FAIL
184707 TSM:FAIL:CNT=7
184709 TSM:FAIL:DIS
184711 TSF:TDI:TSL
244715 TSM:FAIL:RE-INIT
244717 TSM:INIT
244723 TSM:INIT:TSP OK
244727 TSM:INIT:STATID=40
244729 TSF:SID:OK,ID=40
244731 TSM:FPAR
244738 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
246747 !TSM:FPAR:NO REPLY
246749 TSM:FPAR
246753 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
248762 !TSM:FPAR:NO REPLY
248764 TSM:FPAR
248768 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
250777 !TSM:FPAR:NO REPLY
250779 TSM:FPAR
250783 ?TSF:MSG:SEND,40-40-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
252792 !TSM:FPAR:FAIL
252794 TSM:FAIL:CNT=7
252796 TSM:FAIL:DIS
252798 TSF:TDI:TSL

And here are the logs on the gateway side :

!TSF:MSG:SEND,0-0-40-40,s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=NACK:0
TSF:MSG:READ,26-26-0,s=1,c=1,t=0,pt=7,l=5,sg=0:25.8
TSF:MSG:READ,40-40-255,s=255,c=3,t=7,pt=0,l=0,sg=0:
TSF:MSG:BC
TSF:MSG:FPAR REQ,ID=40
TSF:PNG:SEND,TO=0
TSF:CKU:OK
TSF:MSG:GWL OK
!TSF:MSG:SEND,0-0-40-40,s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=NACK:0
TSF:MSG:READ,40-40-255,s=255,c=3,t=7,pt=0,l=0,sg=0:
TSF:MSG:BC
TSF:MSG:FPAR REQ,ID=40
TSF:CKU:OK,FCTRL
TSF:MSG:GWL OK
!TSF:MSG:SEND,0-0-40-40,s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=NACK:0
TSF:MSG:READ,40-40-255,s=255,c=3,t=7,pt=0,l=0,sg=0:
TSF:MSG:BC
TSF:MSG:FPAR REQ,ID=40
TSF:PNG:SEND,TO=0
TSF:CKU:OK
TSF:MSG:GWL OK
!TSF:MSG:SEND,0-0-40-40,s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=NACK:0
TSF:MSG:READ,40-40-255,s=255,c=3,t=7,pt=0,l=0,sg=0:
TSF:MSG:BC
TSF:MSG:FPAR REQ,ID=40
TSF:PNG:SEND,TO=0
TSF:CKU:OK
TSF:MSG:GWL OK
!TSF:MSG:SEND,0-0-40-40,s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=NACK:0
TSF:MSG:READ,40-40-255,s=255,c=3,t=7,pt=0,l=0,sg=0:
TSF:MSG:BC
TSF:MSG:FPAR REQ,ID=40
TSF:CKU:OK,FCTRL
TSF:MSG:GWL OK
!TSF:MSG:SEND,0-0-40-40,s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=NACK:0
TSF:MSG:READ,40-40-255,s=255,c=3,t=7,pt=0,l=0,sg=0:
TSF:MSG:BC

Using https://www.mysensors.org/build/parser, it seems that the gateway received the find_parent request and send its response. The sensor however does not seem to get it.

I tried adding a 4.7uF capacitor on the VCC / GND pins of the radio but nothing changed.

Do you have any idea ?