TX indentical packets & sleep problem

RE: TX indentical packets & sleep problem

mr_creosote — Mon, 02 Jan 2017 16:22:53 GMT

Thanks!

RE: TX indentical packets & sleep problem

mr_creosote — Mon, 02 Jan 2017 16:22:21 GMT

Thanks, that's what I did. I needed a 1-2 byte "timestamp" per packet anyway, so that took care of the issue. The "sending twice" idea is brilliant!

A Happy New Year to you.

Best,

Mahesh

RE: TX indentical packets & sleep problem

ovrebekk — Mon, 02 Jan 2017 13:08:26 GMT

Hi Mahesh

There is a 2-bit counter (PID) in the packet header (PCF) that is updated for every sent packet, and this counter is reset if you enter memory retention.

If the PID, payload and CRC is identical between packets the receiver will consider it a retransmission of the previous packet, and it will send an ACK without raising the RX interrupt.

One possible workaround to this is to ensure that there is some change in the payload (a single bit is enough), or to send two packets rather than one between each wakeup.

Best regards

Torbjørn Øvrebekk

Application Engineer

Nordic Semiconductor

RE: TX indentical packets & sleep problem

mr_creosote — Thu, 29 Dec 2016 08:56:51 GMT

hi, is there a difference? thanks!