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A gateway can stop serving one TCP session while still accepting new ones: every request on the old socket then times out until the kernel gives up (tcp_retries2, ~16 min), or until the add-on is restarted. Count consecutive read timeouts on non-serial links that have a ModbusConnection, and disconnect once Sunsynk.dead_link_timeouts is reached (default 6, 0 disables); the next read opens a new connection. Any successful read resets the count. Serial behaviour is unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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This seems very specific to the connection handling. Maybe this rather belongs in modbus connection? |
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modbus-connection deliberately leaves this to the caller: its docs describe
exactly this case (a serial-to-network bridge that keeps the socket open
while nothing answers, which automatic reconnection cannot see) and
recommend that the integration count consecutive timeouts and call the
disconnect .
Le sam. 10 oct. 2026 à 15:57, Johann Kellerman ***@***.***> a
écrit :
… *kellerza* left a comment (kellerza/sunsynk#699)
<#699 (comment)>
This seems very specific to the connection handling. Maybe this rather
belongs in modbus connection?
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A gateway can stop serving one TCP session while still accepting new ones: every request on the old socket then times out until the kernel gives up (tcp_retries2, ~16 min), or until the add-on is restarted.
Count consecutive read timeouts on non-serial links that have a ModbusConnection, and disconnect once Sunsynk.dead_link_timeouts is reached (default 6, 0 disables); the next read opens a new connection. Any successful read resets the count. Serial behaviour is unchanged.