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Hot!Maximum Payload Size supported for the DR5 on SAMR34 Xplained Pro

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katlin
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2020/06/05 08:47:01 (permalink)
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Maximum Payload Size supported for the DR5 on SAMR34 Xplained Pro

Configuration
SAMR34 Xplained Pro, TTN V2 Public, IND Band, Microchip LoRAWAN Stack, ASF 3.48
 
As per the IND regional specifications, the maximum payload which I can send/receive for DR5 is 242 bytes.
But when the payload is exceeding 230 bytes I am getting MIC Error.
 
My network server is sending 242 bytes downlink to end node, but when received at the end device the first 231 bytes are properly received and the rest of the bytes are like garbage data. 
Example: Downlink Payload from Network Server: 04010101 ..… 01010101010101010101010101
At end node the Downlink is received as 04010101 ..… 01010930023267278AB3BF1211
 
Status code it is returning is MAC NOK! 22 i.e. LORAWAN_MIC_ERROR.
 
Can anyone tell what could be the probable issue? What could go wrong?
 
Regards, 
katlin.
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