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Reduce retransmit timeout after a CAN collision #2566

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Reduce retransmit timeout after a CAN collision #2566

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d1306a4
Retry immediately after processing incoming data after a CAN / NAK
MarkGodwin Jan 25, 2021
36a19a2
Wait a short while before CAN retransmit, just in case.
MarkGodwin Jan 30, 2021
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1 change: 1 addition & 0 deletions cpp/src/Defs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -224,6 +224,7 @@ namespace OpenZWave
#define MAX_TRIES 1 // set this to one, as I believe now that a ACK failure is indication that the device is offline, hence additional attempts will not work.
#define MAX_MAX_TRIES 7 // Don't exceed this retry limit
#define ACK_TIMEOUT 1000 // How long to wait for an ACK
#define CAN_NAK_TIMEOUT 50 // How long to wait before re-transmit after a CAN.
#define BYTE_TIMEOUT 150
//#define RETRY_TIMEOUT 40000 // Retry send after 40 seconds
#define RETRY_TIMEOUT 10000 // Retry send after 10 seconds (we might need to keep this below 10 for Security CC to function correctly)
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4 changes: 3 additions & 1 deletion cpp/src/Driver.cpp
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Expand Up @@ -375,7 +375,9 @@ void Driver::DriverThreadProc(Internal::Platform::Event* _exitEvent)
else if (m_waitingForAck || m_expectedCallbackId || m_expectedReply)
{
count = 4;
timeout = m_waitingForAck ? ACK_TIMEOUT : retryTimeStamp.TimeRemaining();
timeout = !m_waitingForAck ? retryTimeStamp.TimeRemaining() :
m_currentMsg != NULL && m_currentMsg->isResendDuetoCANorNAK() ? CAN_NAK_TIMEOUT :
ACK_TIMEOUT;
if (timeout < 0)
{
timeout = 0;
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