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modbus: add description of parameter "delay" (#12305)

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* modbus: add description of parameter "delay"

Using "delay" causes a pause after connect() and before first send()
allowing the other part to prepare.

* ✏️ Tweak

Co-authored-by: Franck Nijhof <frenck@frenck.nl>
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jan iversen 2020-03-30 14:36:27 +02:00 committed by GitHub
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source/_integrations/modbus.markdown
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@ -53,6 +53,11 @@ timeout:
required: false
default: 3
type: integer
delay:
description: Time to sleep in seconds after connecting and before sending messages. Some modbus-tcp servers need a short delay typically 1-2 seconds in order to prepare the communication. If a server accepts connecting, but there is no response to the requests send, this parameter might help.
required: false
default: 0
type: integer
{% endconfiguration %}
### Serial connection