Digimesh Coordinator SPI_ATTN

Hello
I have network that contains 1 Coordinator and 20 routers with digimesh firmware and API mode , in my network I send broadcast data to all router , I initiate FRAME ID to zero value for not receive response from our routers
But when I monitor spi_attn pin , it falling one time and when I use function to receive xbee data with spi , it hasn’t any data
Please help thank you

Are you trying to communicate via the UART or SPI port?

Have you checked your API frame with XCTU’s API generator to make sure it is correct?

I’m using SPI port to connect my xbee
In the Router when I monitor spi_attn pin and reset xbee module, spi_attn has falling edge and xbee module send to mcu Modem Status (0x8A) frame and I receive this frame and waiting for another frame from coordinator by spi_attn monitoring…
But in the Coordinator when I do the same way by monitoring spi_attn pin, when I reset xbee module, spi_attn has falling edge but it doesn’t send to mcu any frame
Thanks for your help

What are you doing to receive the frames?