jpmeijers
commented
5 years ago A few lines higher than your change is this:
myLora.tx("!"); //one byte, blocking function
Note that it says it is a blocking function. This function will only return when the transmission is done, or when it failed.
The LoRaWAN stack inside the RN2483 module handles the 1% duty cycle limit, so we do not need to. So in other words we can just as well remove the delay all together.
The only reason for the 0.2s delay is to have the LED off for at least a little bit of time, otherwise it will look like it is always on.
Also your comment about "30sec, the legal limit" is incorrect. In Europe - for which this example was written - the legal limit is 1% duty cycle. Using a LoRaWAN airtime calculator one can see that using SF7 and small packet (like 1 byte here) one can transmit every 4.634 seconds. If you want to keep to the TTN fair use policy - which is not a legal limit - one should wait 134 seconds between packets.
simmoinard
I had some troubles using this example, as TTN seems to block the devices if they send data too fast... I juste changed the delay from 0.2sec to 30sec, the legal limit