💬 Temperature Sensor

[gohan]

don't tell me about crappy nrf24... I got a bunch of really bad ones that work but only for 5 meters max.

[skywatch]

I just tried this today but get an error. Here's the output.....

Arduino: 1.8.3 (Windows 10), Board: "Arduino Pro or Pro Mini, ATmega328 (3.3V, 8 MHz)"

In file included from C:\Users\captain\Documents\Arduino\MYS-HW-CH\MYS-HW-CH.ino:37:0:

C:\Users\captain\Documents\Arduino\libraries\DallasTemperature/DallasTemperature.h: In function 'void loop()':

C:\Users\captain\Documents\Arduino\libraries\DallasTemperature/DallasTemperature.h:252:13: error: 'int16_t DallasTemperature::millisToWaitForConversion(uint8_t)' is private

 int16_t millisToWaitForConversion(uint8_t);

         ^

MYS-HW-CH:85: error: within this context

int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());

                                                                                 ^

exit status 1
within this context

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

THis is MYS 2.1.1 installed so a bit baffled as to what is causing the problem, it should just work, right?

Anyone with any insight please let me know! :)

[mfalkvidd]

@skywatch just follow the instructions on the build page:

This example uses a modified version of the external DTH library, which is included in the MySensors external examples. Please install it and restart the Arduino IDE before trying to compile.

[skywatch]

Thank you - that did it.

But it would be good to have that info in the file header too, just to call attention to it. Either that or a structured step-by-step tutorial so that things like this don't get left out.

At least it works now though, kul!

[markjgabb]

really silly question.....so does create multiple sensors? so i would have temp1 temp2 or does it combine the value of both for an averaged temprature?
the way i read it it would present mutiple sensors i think?

[gohan]

It creates the sensors that you present during the presentation.

[markjgabb]

appologies for the badly worded questions...the code in its example format....
am i reading it correctly that it presents sensors based on the variable for number of temp sensors?

[gohan]

It will present different sensros according to the #define MAX_ATTACHED_DS18B20 16

[Digdogger]

Hi,
I have only one sensor on the mini pro and I have this in the logs:
2017-07-30 14:41:28.492 (Mysensor) Temp (Congélateur)
2017-07-30 14:41:28.497 (Mysensor) Temp (Congélateur)
2017-07-30 14:41:28.501 (Mysensor) Temp (Congélateur)
2017-07-30 14:41:28.506 (Mysensor) Temp (Congélateur)
2017-07-30 14:41:28.510 (Mysensor) Temp (Congélateur)
2017-07-30 14:41:28.515 (Mysensor) Temp (Congélateur)
2017-07-30 14:41:28.521 (Mysensor) Temp (Congélateur)
2017-07-30 14:41:28.526 (Mysensor) Temp (Congélateur)

Sleep time is set to 60000ms, why the time between 2 messages is around 5ms???

[mfalkvidd]

@Digdogger it can depend on a lot of things. The best way to know is to look at the debug logs from the node and the gateway from the time when it happened. There could be a problem with the communication, with the radios, with the power supply, with the sketch, etc.

It could also be that you're using a microcontroller that doesn't support MySensors sleep, such as the esp8266. But it is just a guess. The information that's usually needed to troubleshoot is listed in https://forum.mysensors.org/topic/666/debug-faq-and-how-ask-for-help/

[Digdogger]

OK thanks mfalkvidd

[ben999]

Slightly off-topic here... but related to this particular sketch

If you look close enough (and copy-paste the sketch into your IDE) you'll witness that one curly-bracket is technically missing at the end of loop()...

But as I added it to the sketch I got error

Sketch compiles fine "with" the missing curly-bracket... ???

Any comment to that (in my sense) funny behavior ?

[mfalkvidd]

@ben999 the simple answer is probably that the backet isn't missing :)

Can you show why you think it is missing?

[ben999]

@mfalkvidd

I must have gone mad then :ghost:

Check the loop()
The last closing curly--bracket is for

for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {

So which one closes

void loop()     {  

If i add one more to "make it right" then hell brakes loose...

sketch_jul31a:110: error: expected declaration before '}' token
 }
 ^
exit status 1
expected declaration before '}' token

1-That's the only sketch behaving this way
2-Even the "IDE-automatic-opening-bracket-finder" (shows which bracket is open when placing cursor on closing bracket) can NOT find the right bracket for loop()...

:scream:

[mfalkvidd]

Interesting observation @ben999

This is caused by the preprocessing directives.

#if COMPARE_TEMP == 1
    if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {
#else
    if (temperature != -127.00 && temperature != 85.00) {
#endif

Only one of these if statements will be active. The Arduino IDE probably doesn't evaluate preprocessing directives, so it sees two if statements and therefore thinks it should see two end braces. A way to "fix" this could be to move the starting curly brace to after the preprocessing directives:

#if COMPARE_TEMP == 1
    if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00)
#else
    if (temperature != -127.00 && temperature != 85.00)
#endif
    {

This allows the Arduino IDE to parse the code correctly, and correctly match the braces.

[gohan]

It's time to move to a better IDE 😁

[ben999]

@mfalkvidd
Gosh you're a genius ! And you share your knowledge with style and simple explanation ! But i can only upvote you once :D

@gohan
No way :D IDE is nice and simple for nice and simple people like me :rabbit:

[chaeron]

I just upgraded to the MYS 2.1.1 version.

My OneWire temperature sensors were not detected!

I moved the sensors.begin() from setup() to before(), and that seems to have fixed things, and my temp sensors are being detected and read now.

Anyone know why the OneWire library has to be initialized before MySensors setup?

Thanks!

[rejoe2]

@chaeron I assume, you used an old version of the sketch.

Your question most likely is related to a change in the order of the initialisation. This has changed in Version 2.2: from
setup()=>presentation()
to
before()=>presentation()=>setup().

So also the initialisation of sensors had to be reviewed accordingly (eg. to get the number of devices).

[chaeron]

@rejoe2 said in 💬 Temperature Sensor:

@chaeron I assume, you used an old version of the sketch.

That is correct....the original code was written over a year ago. Trying to run it under 2.1.1 caused it to fail.

Your question most likely is related to a change in the order of the initialisation. This has changed in Version 2.2: from
setup()=>presentation()
to
before()=>presentation()=>setup().

So where was this rather major change documented? It would probably have broken any 1-Wire examples, including the temperature one.

So also the initialisation of sensors had to be reviewed accordingly (eg. to get the number of devices).

So I figured out....I went looking for documentation on this rather significant change and was not able to find it noted anywhere.