The new JeeLink v2 has an “activity LED” added, which is not present on the JeeNode.
This is simply a LED from PB1 (Arduino pin 9) to “+” via a current limiting resistor. It’s very easy to add the same activity light to the JeeNode, using a 4-pin connector:
Now place this contraption on the SPI/ISP connector as follows:
Voilà – it even has PWM!
The latest RF12demo code now has a “l” command to test the led – “1l” turns it on, “0l” turns it off again.
Woohoo – this is post #300 !