I have configured three XBee's with each other.One of the XB-S2C (API) is configured as a Coordinator and another XB-S2C and XB-S2 (both AT) as End Devices.
They communicate with each other as normal, and I have no issue with the Communication part of it.
When I use the coordinator to transmit a ND packet in API mode, I receive a response from sometimes either one, or both and sometimes I do not receive any response.
When I transmit the packet, the end devices wake up every time but their response doesn't show up on the coordinators UART terminal.
End Device (S2C and S2):