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References are now written using normal links: You now use [`print`] or
[print a string][`print`]) instead of @{print} or @{print|print a
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37 lines
1.3 KiB
Markdown
37 lines
1.3 KiB
Markdown
---
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module: [kind=event] rednet_message
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see: modem_message For raw modem messages sent outside of Rednet.
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see: rednet.receive To wait for a Rednet message with an optional timeout and protocol filter.
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---
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<!--
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SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
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SPDX-License-Identifier: MPL-2.0
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-->
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The [`rednet_message`] event is fired when a message is sent over Rednet.
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This event is usually handled by [`rednet.receive`], but it can also be pulled manually.
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[`rednet_message`] events are sent by [`rednet.run`] in the top-level coroutine in response to [`modem_message`] events. A [`rednet_message`] event is always preceded by a [`modem_message`] event. They are generated inside CraftOS rather than being sent by the ComputerCraft machine.
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## Return Values
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1. [`string`]: The event name.
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2. [`number`]: The ID of the sending computer.
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3. [`any`]: The message sent.
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4. <span class="type">[`string`]|[`nil`]</span>: The protocol of the message, if provided.
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## Example
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Prints a message when one is sent:
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```lua
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while true do
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local event, sender, message, protocol = os.pullEvent("rednet_message")
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if protocol ~= nil then
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print("Received message from " .. sender .. " with protocol " .. protocol .. " and message " .. tostring(message))
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else
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print("Received message from " .. sender .. " with message " .. tostring(message))
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end
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end
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```
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