ble uart app packet lose

[Fiske]

I use the ble uart app to receive the data from mobile phone. The data packet size is 20 byte. If I transmit the packet one by one without adding delay, is it possible that there will be packet lose in receiver side.

[run_ar]

Only if you overflow the buffer on the mobile phone. Which is possible on at least iOS, not sure about Android. If you need to send a lot of data fast can use write commang and calculate the crc over a given amount of packets to make sure you don't loose data.