meshtastic/docs/settings/serial-module.md

id	title	sidebar_label
serial-module	Serial Module Settings	Serial Module

import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem';

:::warning GPIO access is fundamentally dangerous because invalid options can physically damage or destroy your hardware. Ensure that you fully understand the schematic for your particular device before trying this as we do not offer a warranty. Use at your own risk. :::

:::note This module requires attaching a peripheral accessory to your device. It will not work without one. :::

Overview

This is a simple interface to send messages over the mesh network by sending strings over a serial port. Anything you send the node will be turned into a message sent out over the mesh, and anything received from the mesh will be sent to the serial port. Note that this module does not (yet) allow arbitrary protobuf commands to be sent over the serial connection.

:::tip Once module settings are changed, a reset is required for them to take effect. :::

:::tip Connect the TX pin to the other device's RX pin, and vice versa. Connect their grounds to each other (not necessary if they're both plugged into the same USB power source.) :::

Settings

Setting	Acceptable Values	Default
serial_module_enabled	true, false	false
serial_module_echo	true, false	false
serial_module_mode	integer	0
serial_module_rxd	integer (GPIO)	0
serial_module_timeout	integer (seconds)	0
serial_module_txd	integer (GPIO)	0

serial_module_enabled

Enables the module.

<Tabs groupId="settings" defaultValue="cli" values={[ {label: 'CLI', value: 'cli'}, {label: 'Android', value: 'android'}, {label: 'iOS', value: 'iOS'}, {label: 'Web', value: 'web'}, ]}>

meshtastic --set serial_module_enabled true

meshtastic --set serial_module_enabled false

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

serial_module_echo

If set, any packets you send will be echoed back to your device.

<Tabs groupId="settings" defaultValue="cli" values={[ {label: 'CLI', value: 'cli'}, {label: 'Android', value: 'android'}, {label: 'iOS', value: 'iOS'}, {label: 'Web', value: 'web'}, ]}>

meshtastic --set serial_module_echo true

meshtastic --set serial_module_echo false

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

serial_module_mode

<Tabs groupId="settings" defaultValue="cli" values={[ {label: 'CLI', value: 'cli'}, {label: 'Android', value: 'android'}, {label: 'iOS', value: 'iOS'}, {label: 'Web', value: 'web'}, ]}>

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

serial_module_rxd

Set the GPIO pin to the RXD pin you have set up.

:::caution To prevent damaging your device, double check your device's schematics before attaching to the GPIO pins and setting this value. :::

<Tabs groupId="settings" defaultValue="cli" values={[ {label: 'CLI', value: 'cli'}, {label: 'Android', value: 'android'}, {label: 'iOS', value: 'iOS'}, {label: 'Web', value: 'web'}, ]}>

:::note Replace GPIO in the below command with the GPIO number your circuit is attached to. :::

meshtastic --set serial_module_rxd GPIO

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

serial_module_timeout

The amount of time to wait before we consider your packet as "done".

<Tabs groupId="settings" defaultValue="cli" values={[ {label: 'CLI', value: 'cli'}, {label: 'Android', value: 'android'}, {label: 'iOS', value: 'iOS'}, {label: 'Web', value: 'web'}, ]}>

meshtastic --set serial_module_timeout 15

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

serial_module_txd

Set the GPIO pin to the TXD pin you have set up.

:::caution To prevent damaging your device, double check your device's schematics before attaching to the GPIO pins and setting this value. :::

<Tabs groupId="settings" defaultValue="cli" values={[ {label: 'CLI', value: 'cli'}, {label: 'Android', value: 'android'}, {label: 'iOS', value: 'iOS'}, {label: 'Web', value: 'web'}, ]}>

:::note Replace GPIO in the below command with the GPIO number your circuit is attached to. :::

meshtastic --set serial_module_txd GPIO

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::

:::info Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page. :::