How to send updated V_TEXT/S_INFO to controller?

[micah]

I'm working on an alarm clock... my controller is Domotiocz. I'm using a text sensor to send the alarm time to my arduino.... the following post helped me get it all working properly -> lcd-clock-and-text-sensor-node-with-new-v_text

My clock also has buttons (like a traditional alarm clock), I've written all the code to change the alarm using the buttons.

Now I want to send the new alarm time set on the arduino to the controller (Domoticz), and have the text sensor updated. I thought this would simply be a send(....) command, but I can't get it working.

Here is a sub-set sample code of what I thought I needed to do to send the update (I'm on mysensors 2.0.*)

#define MY_DEBUG 
#define MY_RADIO_NRF24
#define MY_NODE_ID 9
#include <SPI.h>
#include <MySensors.h>
#define cID_ALARM_TIME 1

MyMessage MySensors_MSG_Alarm1_Time(cID_ALARM_TIME, V_TEXT);

void setup() {
	Serial.begin(115200);

	request(cID_ALARM_TIME, V_TEXT);
}
void presentation()  {
	sendSketchInfo("WakeUp Clock", "0.0.1");
	
	present(cID_ALARM_TIME, S_INFO, "Alarm Time", true);
}
void loop() {

	int newHour = 12;
	int newMinute = 45;

	String val = String(newHour) + "." + String(newMinute);

	send(MySensors_MSG_Alarm1_Time.set(val), true);
}
void receive(const MyMessage &message) {
	if (message.type==V_TEXT) {
		if (message.sensor == cID_ALARM_TIME){
			// Here is where the return value comes from Domoticz when requesting the V_TEXT
		}
	}
}

When I run it I get the following console message....

35287 TSF:MSG:SEND,9-9-0-0,s=1,c=1,t=47,pt=1,l=1,sg=0,ft=0,st=OK:1
35297 TSF:MSG:READ,0-0-9,s=1,c=1,t=47,pt=1,l=1,sg=0:1
35302 TSF:MSG:ACK

and then my controller (Domoticz) updates the text sensor to the value of 1

I'm very confused, please help :)

[hek]

You should not use the String class in a Arduino environment (google why).

The send function takes a char buffer. If you need to append/copy things into it, use strcpy or memcpy.

http://www.cplusplus.com/reference/cstring/strcpy/

[mfalkvidd]

@hek not strncpy? http://www.cplusplus.com/reference/cstring/strncpy/

[hek]

@mfalkvidd
Sure, if you'd like some more control over things :)

[mfalkvidd]

@hek otherwise you might end up in this thread https://forum.mysensors.org/topic/5212/why-ioyt-matters

Edit: well not centrally bricked but owned and part of a botnet

[micah]

@hek
Ok, I think I understand what you are saying, but I can't figure out the implementation.

This didn't work

char temp_Msg[3];
strcpy (temp_Msg, char("1"));
strcpy (temp_Msg, char("."));
strcpy (temp_Msg, char("1"));
send(MySensors_MSG_Alarm1_Time.set(temp_Msg), true);

or this

char temp_Msg[3];
strcpy (temp_Msg, "1");
strcpy (temp_Msg, ".");
strcpy (temp_Msg, "1");
send(MySensors_MSG_Alarm1_Time.set(temp_Msg), true);

or this

char temp_Msg[3];
strcpy (temp_Msg, '1');
strcpy (temp_Msg, '.');
strcpy (temp_Msg, '1');
send(MySensors_MSG_Alarm1_Time.set(temp_Msg), true);

But this does work (message is sent and loaded into Domoticz)

send(MySensors_MSG_Alarm1_Time.set("1.1"), true);

What am I not understanding?

[hek]

  char buf[20];
  strcpy (buf,"Hello ");
  strcat (buf,"world");
  strcat (buf,"!");

[micah]

@hek

Oh, I didn't know I needed to use both.

Well I tried a million combinations after seemingly reading everything on the subject, and I still couldn't get {int + char + int} converted into a char[] using strcpy and strcat

for some reason my brain is just not wrapping itself around the concept today... maybe I'll come back to it tomorrow.

In the mean time, I tried the following and it worked.

char buf[20];    
sprintf(buf, "%d.%d", Alarm1_Time_Local[0], Alarm1_Time_Local[1]);
send(MySensors_MSG_Alarm1_Time.set(buf), true);

I've read that using sprintf increases the size of your sketch... but for now I'm fine with it, since it works and I can move on to being creative and productive.. lol