@Fl0rian The maximum depends on how much traffic there is on your network and how fast your controller can reply. You could probably ask at least a few times per second, which is much faster than would be useful anyway.
Yes, the difference you see in sleep time is due to the same reason.
@Fl0rian most Arduinos lack a real time clock, and rely on the signal generated by the oscillator. The frequency of the oscillator varies between different chips, supply voltage and temperature, so the Arduino's sense of time will not be exact.
Due to this inexactness, the TimeAwareSensor example re-synchronizes with the controller once per hour.
See http://jorisvr.nl/article/arduino-frequency if you want to dig deeper.
@Magnus-Pernemark which version are you using?
The development version from github supports
#define MY_BAUD_RATE 9600
at the start of the sketch.
The 2.1.1 version has
Serial.begin(115200);
in the sketch. Just change that.
Welcome to the MySensors community @pandy
./configure --my-transport=nrf24
should be sufficient. What results did you get from the make and sudo ./bin/mysgw -d commands?
@Heizelmann No. But a controller can communicate with all networks.
@moskovskiy82 theoretical difference: http://www.learningaboutelectronics.com/Articles/Difference-between-a-NPN-and-a-PNP-transistor
Practical difference: not much in the Arduino home automation world. But I prefer NPN since that's what the MySensors examples use.
@Borodi-Adrian "not working" is not a problem description we can help you much with unfortunately.
See https://forum.mysensors.org/topic/666/debug-faq-and-how-ask-for-help/ for the most common problems and how to fix them. Also see the faq on that page for how to turn on the MySensors debug output and the "How to ask for help" section for the information that usually is needed to help troubleshooting.
@rozpruwacz sending a single message on nrf24 takes about 1ms, which is 10x the time it takes to do an analogRead (1ms = 1,000 us). So unless you need to check the button more than several thousand times per second you're going to be fine.
Quick calculation example: let's say you have 10 buttons and you want to check each them 50 times per second (which is much faster than a human can react, normal reaction time is about 1/10 to 1/20 second). That would require checking 10 * 50 * 100us = 50,000us = 50 ms. You'll still have 950ms to do everything else. So even an extreme case would not be a problem.
Welcome to the MySensors community @Borodi-Adrian
You either need to redefine the default MySensors pins, or wire like this: https://www.mysensors.org/build/connect_radio#rfm69-&-arduino