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STM32WB BLE data transmission losses

Aishwarya
Associate III

STM32WB firmware updates v1.10.0 introduces large no of data packet loss in high-speed data transmission.

2 REPLIES 2
Remi QUINTIN
ST Employee

​Can you quantify the term "large number"?

High-speed = 2M Phy?

Which sw project from  v1.10 package did you use to evaluate those losses?

Aishwarya
Associate III

BLE protocol(Used to send the data using notify property i.e no need of ack):

BLE throughput deciding parameters value-

  • Phy modulation frequency: 1MHz
  • Connection interval(CI): 7.5 to 11.25 ms(milli seconds)
  • MAX BLE PACKET LENGTH(MTU) size : 512(max)

User Application parameters value-

  • Data rate(user define): 500 samples per second.
  • size of a single packet: 46 Bytes

Issue:

  • loss of data(data packet loss detected by packet ID).
  • WB firmware updates after 1.8.0 are not stable i.e cause for losses.

Note:

Packet ID: last bit of every data packet and update by 1 with the next sending data packet.