Because project development，I used vAppApiMcpsRequest() to transmit more 127 bytes of data, I try change define MAC_MAX_PHY_PKT_SIZE to 256 or 512,But still can't transmit more bytes .
What should I do to transmit more?Thank.
The maximum size of the IEEE 802.15.4 IS 127 bytes, includes the header, CRC and payload.
Also, the payload depends on the security that you have.
Please look at the IEEE 802.15.4 Stack User Guide
B.3.2 Frame Size
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