Hi
My setup is:

Hardware

GW
Arduino Nano 5v
RFM69
DC-DC from 5v to 3.3v and 100uF capacitor

Node
Arduino ProMini 3.3v
RFM69

Software

GW

#define MY_DEBUG

#define MY_RADIO_RFM69
#define MY_RFM69_FREQUENCY RFM69_868MHZ
#define MY_GATEWAY_SERIAL

*#define MY_INCLUSION_MODE_FEATURE
#define MY_INCLUSION_MODE_DURATION 60
#define MY_DEFAULT_LED_BLINK_PERIOD 300

#include <MySensors.h>*
void setup(){}
void presentation(){}
void loop(){}

Distance between GW and Node is aprox. 1m

Node

#define MY_NODE_ID 100

#define MY_DEBUG
#define MY_DEBUG_VERBOSE_RFM69
#define MY_DEBUG_VERBOSE_RFM69_REGISTERS
#define MY_DEBUG_VERBOSE_TRANSPORT
#define MY_DEBUG_VERBOSE_CORE

// Enable and select radio type attached MY_RADIO_RFM69
#define MY_RADIO_RFM69
#define MY_RFM69_FREQUENCY RFM69_868MHZ

#define MY_PARENT_NODE_IS_STATIC
#define MY_PARENT_NODE_ID 0x0

#include <MySensors.h>
void presentation() {
sendSketchInfo("TestNode", "1.0");
present(0, S_ARDUINO_NODE, "Counter");
}

Logs

GW

0;255;3;0;9;0 MCO:BGN:INIT GW,CP=RRNGA---,FQ=16,REL=255,VER=2.3.2
0;255;3;0;9;5 TSM:INIT
0;255;3;0;9;7 TSF:WUR:MS=0
0;255;3;0;9;12 TSM:INIT:TSP OK
0;255;3;0;9;19 TSM:INIT:GW MODE
0;255;3;0;9;22 TSM:READY:ID=0,PAR=0,DIS=0
0;255;3;0;9;26 MCO:REG:NOT NEEDED
0;255;3;0;14;Gateway startup complete.
0;255;0;0;18;2.3.2
0;255;3;0;9;30 MCO:BGN:STP
0;255;3;0;9;37 MCO:BGN:INIT OK,TSP=1
0;255;3;0;9;44 TSM:READY:NWD REQ
0;255;3;0;9;49 ?TSF:MSG:SEND,0-0-255-255,s=255,c=3,t=20,pt=0,l=0,sg=0,ft=0,st=OK:

Node

16 MCO:BGN:INIT NODE,CP=RRNNA---,FQ=8,REL=255,VER=2.3.2
28 TSM:INIT
28 TSF:WUR:MS=0
34 TSM:INIT:TSP OK
38 TSM:INIT:STATID=100
43 TSF:SID:OK,ID=100
45 TSM:FPAR
47 TSM:FPAR:STATP=0
49 TSM:ID
49 TSM:ID:OK
51 TSM:UPL
1269 !TSF:MSG:SEND,100-100-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=NACK:1
3278 TSM:UPL
4497 !TSF:MSG:SEND,100-100-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=1,st=NACK:1
6506 TSM:UPL
7725 !TSF:MSG:SEND,100-100-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=2,st=NACK:1
9734 TSM:UPL
10952 !TSF:MSG:SEND,100-100-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=3,st=NACK:1
12961 !TSM:UPL:FAIL
12963 TSM:FPAR
12963 TSM:FPAR:STATP=0
12967 TSM:ID
12967 TSM:ID:OK
12969 TSM:UPL
14190 !TSF:MSG:SEND,100-100-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=4,st=NACK:1
16199 TSM:UPL
17418 !TSF:MSG:SEND,100-100-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=5,st=NACK:1
19427 TSM:UPL
20645 !TSF:MSG:SEND,100-100-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=6,st=NACK:1
22657 TSM:UPL

Any info/suggestion is highly appreciated.
Thank you

Here are the pictures:

But my question (maybe stupid question) is: It is possible the the radio module to be broken only on the "send side"?

Thank you.

@mfalkvidd multimeter

Update: it seems the problem was the DC-DC convertor. I have replace it with an extwrnal power source and now it works.
I still don't understand what was wrong there because the voltage on the radio module was correct:3.3V

@mfalkvidd multimeter

Update: it seems the problem was the DC-DC convertor. I have replace it with an extwrnal power source and now it works.
I still don't understand what was wrong there because the voltage on the radio module was correct:3.3V

@yury may be node radio is HCW somehow? no, it is not.

I'll try to create a new board and give feedback.

Unfortunately no schecma available. I've create the pcb on some website (don't know if is ok to say the site name here)
The reset pad is indeed soldered, but the pad is not connected to anything.
NSS->LV1->HV1->D10
SCK->LV2->HV2->D13
MOSI->LV3->HV3->D11
MISO->LV4->HV4->D12
DIO0->D2

Btw. I've never reset the radio module

Here are the pictures:

But my question (maybe stupid question) is: It is possible the the radio module to be broken only on the "send side"?

Thank you.

@yury
On the sende side (GW) I'm using Arduino Nano 5v and a logic shifter indeed.
On the receiver side (Node) I'm using a "prebuild board" purchased from tindie.
Btw, I think I bought from you, "easySensor" . Your devices works fine.

The problem is on the "sender" side, built by me. I've already built two "boards" and both have the same problem. Sending doesn't work.

@mfalkvidd the GW ia not totally mute, it sends at least the ACK, and also, the Node is not totallly deaf, it receives the ACK

@mfalkvidd The node(sender), send a message with ack. The GW(receiver), receive the message and send the ack. The ack is never received on the node(sender) side.

I've made the swap: I've load the gw(receiver) code to node(sender) and vice-versa. Technically, i've made the GWa sender and the Node a receiver.
My GW (now a sender) is not able to send anything, or at least, the Node(now a receiver) doesn't receive anything.

So it seems there is a HW issue on the "send side" of the GW.

@mfalkvidd exactly. the GW(receiver) was not able to send the ACK. in fact, the GW isn't able to send something. probably is a HW issue.

1. do you have any ideea where/what should I investigate?
2. it is possible that radio module on the GW to be broken only on the "send side"? I'm asking because I have two different GW with the same behaviour, so definatly I do something wrong.

Thank you

More info: I've performed some tests using the RFM69_LowPowerLab and it seems my both radio modules work on both GW and Node. I was able to send and receive messages, but the was not received on the Node side