@dirkb19
Use Arduino 1.6.13 and not 1.8, it's a problem related to fuses with clones...
You need to program with another arduino nano (or other) as ISP
Then use the following:
Duemilanove > 328P
arduino as ISP
plug the 7-19v Vin on the rboard
You may also have to burn the bootloader
And maybe need to press manually reset button on rboard, personally i don't need to.
I've been struggling for a while with this board.
@pku if your keys are in the sketch everything will work for signing.
#define MY_SOFT_HMAC_KEY XXX... //signing key
#define MY_AES_KEY XXX... // if you use encryption
Of course if you want to use whitelisting then you need to compile each node sketch separately with it's serial.
@NiklasO
Personally I set the node ID manually to avoid this
#define MY_NODE_ID 30 // Sets a static id for a node
And I group tens so all my 3X nodes are in kitchen, 4X in office, 11X in bedroom 1 and so on.
I would love to see a proxy mode in MYSController, in order to interface between a controller that doesn't support OTA and an Ethernet gateway 
Let say your LAN is the following:
Whenever you need to update a node, you launch MYSController but don't connect to the gateway, then you tells Domoticz .2 to connect to MYSController .3 instead of the gateway .1, at this point MYSController starts relaying everything between Domoticz and the gateway + provides you the ability to update a node.
When you want to get back to normal operations, you set back 192.168.0.1 on Domoticz, MYSController receives a TCP reset and ends it's session with Domoticz and stop the session with the gateway.
We would get a minimum downtime and can could use MYSController to update nodes and debug traffic while letting the normal controller...controlling
I can now gets dozen of packets at once, then hold, continues...depending of how I press the wires on radio side 
It's a wiring problem, will try this weekend with a soldered node.
Thank you
Just tried with this release, works great (had no problem with previous release)
The only drawback is the packet bitrate, around 40 per minute with 45 bytes each.
It takes 1h to flash a node. few minutes, just make sure of your wiring as this is a very intensive process compared to node's standard radio use.
Here is a flash running on a test network:
Can we update many nodes at the same time ? haven't tried