Request Value from Node

[gohan]

take a look at this https://www.mysensors.org/build/pulse_power

[Soloam]

@gohan Ii can see the request:

    } else if (sendTime && !pcReceived) {
        // No pulse count value received. Try requesting it again
        request(CHILD_ID, V_VAR1);
        lastSend=now;
    }

But I can't seem to understand where is being processed, in the receive function no validation is preformed to check if it's a request or a actuation. In this case I presume that It's irrelevant (because is a informative node only), but in the case of a nodes with actuators, I need to know if the message that is arriving is a actuator (set) or a request.

[gohan]

It is checking if it is a V_VAR1 message, the other messages use different variable types

[Soloam]

@gohan I see, it's the same solution that i'm using at the moment, it would be nice to have a flag in the requests replay, that would allow to make a cleaner code, without having to use dummy variables.

Thank You @gohan

[gohan]

I am using the pulse power meter but I didn't use any dummy variable. Also the controller plays a role too.

[Soloam]

@gohan you don't use a dummy variable (VAR_1)? So who do you know when the message arrives if it's a request?

[rozpruwacz]

I think that @Soloam is asking how can a gateway request a value from the node not how node can request a value from gateway. If so then You must hadle it in the receive funtion (https://www.mysensors.org/download/sensor_api_20#requesting-data). The request message has distinct command type (https://www.mysensors.org/download/serial_api_20). You can get the message command type with getCommand method - unfortunetly this is not documented ... why ?

[Soloam]

@rozpruwacz You are rigth, I Want GW => Node Request or Node => Node Requests, and I've seen the command type in the notes, but who can I access that command value in the code?

1;1;2;0;2;0 - Requesting Node 1 Child 1 variable V_STATUS, Who do I know that the Command is 2 (request) ?

[mfalkvidd]

@soloam looks like you should be able to use mGetCommand and check for C_SET / C_REQ.

[Soloam]

@mfalkvidd thank you, that will do the job! I leave the ideia to a isReq()! :)

Thank you all

[rozpruwacz]

@soloam said in Request Value from Node:

@rozpruwacz You are rigth, I Want GW => Node Request or Node => Node Requests, and I've seen the command type in the notes, but who can I access that command value in the code?
1;1;2;0;2;0 - Requesting Node 1 Child 1 variable V_STATUS, Who do I know that the Command is 2 (request) ?

as I said You need to use getCommand method on the message object.

[rozpruwacz]

@mfalkvidd said in Request Value from Node:

@soloam looks like you should be able to use mGetCommand and check for C_SET / C_REQ.

Is this mGetCommand is official API ? because it does not look like. I wouldn't use undocumented methods, because they may disapear in new releases.

[mfalkvidd]

@rozpruwacz yes it is.

[rozpruwacz]

I didn't see that before, thanks :)