Actually it printed Message arrived on topic: mygateway1-in/23/19/1/0/2 on arduino serial. meaning that it received it correctly. I just copied the one without dash with mistake because I was testing with a topic without the dash, cas I thought that this line

    if (strcmp_P(str, MY_MQTT_SUBSCRIBE_TOPIC_PREFIX) != 0)

have problem with the dash.

mosquitto_pub -t mygateway1-in/7/5/1/0/2 -m 1
It was received by the gateway and printed

Message arrived on topic: mygateway1in/23/19/1/0/2

Looks like the dash-character is swallowed when you don't quote the topic on windows.

Can't debug this on my mac. Just change the topic prefix in sketch to something without without dash.

You seem to have problem with your radio. This has been discussed elsewhere on forum and there is a troubleshoot guide on man site.

Serial gateway is working with the same pattern sent.

I made sure that the buffer sent using serial or using mqtt are the same. I send ;23;19;1;0;2;1 using serial, and mygateway1in/23/19/1/0/2 using mqtt. and both printed same buffer.

RF24::write > startFastWrite > RF24::write_payload
023101219490

I changed the nRF also but it didn't solve the problem.

First, I am working on windows and using chrome plugin MQTTlens. I decided using mosiquitto as you said.But using

mosquitto_pub -t 'mygateway1-in/7/5/1/0/2' -m '1' 

didn't work, I used instead

mosquitto_pub -t mygateway1-in/7/5/1/0/2 -m 1

It was received by the gateway and printed

Message arrived on topic: mygateway1in/23/19/1/0/2

But the second thing is that incomingMQTT() function, the frame is not evaluated at all. It goes to case 0 and return

case 0: {
    // Topic prefix
    if (strcmp_P(str, MY_MQTT_SUBSCRIBE_TOPIC_PREFIX) != 0)
    {
        // Message not for us or malformed!
	    Serial.println("DOOLA - incomingMQTT - case 0 ERROR");
            return;
     }
    Serial.println("DOOLA - incomingMQTT - case 0");
    break;
}

I tried commenting the if condition and I frame was evaluated but i received st=fail:1

I suppose that it is working and tested and maybe I have a problem, right ?

> mosquitto_pub -t 'mygateway1-in/7/5/1/0/2' -m '1'

When I set my mqtt gateway, it subscribes to mygateway-prefex/+/+/+/+/+

When I was using serial gateways, I was doing the following to turn on or off a relay.

7;5;1;0;2;1 This sets node id 7, child id 5, message type '1' (set), no ack, sub-type '2' (V_LIGHT), to be >>> equal 1 (ON)
7;5;1;0;2;0 This sets node id 7, child id 5, message type '1' (set), no ack, sub-type '2' (V_LIGHT), to be >>> equal 0 (OFF)

While using mqtt, what I expected that we subscribe to a topic name like mygateway1-in then I shall normally add my 6 bits which are 7/5/1/0/2/1 or 7/5/1/0/2/0

So my question is about setting the payload to 1 or 0. I still can see that you mentioned that MQTT frame is like this
MY-MQTT-TOPIC-PREFIX/NODE-ID/SENSOR-ID/CMD-TYPE/ACK-FLAG/SUB-TYPE
while the serial frame has one more option for payload
node-id;child-sensor-id;message-type;ack;sub-type;payload\n

I hope that you understood my problem. Thanks.