Receive added (With suggested changes)

[DenniZr]

Should i do anything else? New to github

[jpmeijers]

No it's not necessary. I just need to merge it into master.

But let me just test a little more and think if this is the correct way of handling downlinks. I find this solution nice and simple, but I need to think about and test confirmed uplinks too.

What makes me think twice about how it is done now is that you always need to do a hasRX() after every TX. On the one hand this is a simple and understandable solution, which makes the library usable to more people, but a more elegant solution would be if the TX function returned a status.

For example at the moment tx() returns a false if the transmission was unsuccessful. And it returns true if it was successful and/or a acknowledgement was received. False is the same as 0, and true is a positive number. If we return a 1 for successful transmission and a 2 for successful transmission with data received, it could work well.

But as I said I need to think which way will be the best. I'd rather do it correctly now than changing the API later.

[jpmeijers]

The TX functions now return one of three enum values:

• TX_FAIL = 0, //The transmission failed. In the case of a confirmed message that is not acked, this will be the returned value.
• TX_SUCCESS = 1, //The transmission was successful. Also the case when a confirmed message was acked.
• TX_WITH_RX = 2 //A downlink message was received after the transmission. This also implies that a confirmed message is acked.