Timing Issue with XBee3 Pin Sleep

[aprsandrew]

There seems to be a timing issue with the pin sleep when using an XBee 3 module. When monitoring for transmissions, packets are only intermittently received.

If you wake the logger (ie, 300 second timeout when downloading data), it will transmit every 10 seconds like normal, but as soon as the 300 second timeout runs down and it starts using sleep again, the transmissions are very intermittent, sometimes with minutes between.

As a workaround, we have just been using the XBee 3 modules with pin sleep disabled, as they do have lower idle power consumption than older modules. But would still be a good thing to look at next time any firmware development is done.