I have an xbee s2c ZigBee as an end-device communicating with the same device as coordinator connected to XCTU. The end-device gets SPI frames from an external MCU, frames with fram id = 0 (no status in return). I've enabled the SPI ports on the end-device.
When the end-device is configured without sleeping (router) it sends the messages, but when in cyclic og pin sleep nothing happens. Even if I add long timings on wake/on time and communication signals.
I also monitor and sync towards the ON from the xbee, but without any luck. CTS is unavailable in SPI, so no use in that signal.
I've also read dozens of posts, but without any fixes that help. So if any have experience with this I'd appreciate any suggestions.