meshtastic/docs/software/settings/mqtt.md

id	title	sidebar_label
mqtt	MQTT Settings	MQTT

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

:::note This is still under development, use at your own risk. Report any bugs you see by creating an issue on the meshtastic/Meshtastic-device repository or comment on our forum. :::

:::caution You may want to change your GPS location sharing settings if you are enabling this. It will broadcast your location over the internet. :::

Overview

If your device is connected to WiFi you can enable it to forward messages along to an MQTT server. This allows users on the local mesh to communicate with users on the internet.

Be sure to checkout this MQTT too.

Settings

Setting	Acceptable Values	Default
mqtt_disabled	true, false	false
mqtt_server	string	""
mqtt_password	string	""
mqtt_username	string	""
uplink_enabled	true, false	false
downlink_enabled	true, false	false

mqtt_disabled

If a meshtastic node is able to reach the internet it will normally attempt to gateway any channels that are marked as uplink_enabled or downlink_enabled. But if this flag is set, all MQTT features will be disabled and no servers will be contacted.

Enable/Disable MQTT

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

meshtastic --set mqtt_disabled false

meshtastic --set mqtt_disabled true

:::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. :::

mqtt_server

The server to use for our MQTT global message gateway feature. If not set, the default server will be used

Enable/Disable MQTT Server

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

:::tip When the mqtt_server is set to "", it will default to mqtt.meshtastic.org :::

meshtastic --set mqtt_server ""

meshtastic --set mqtt_server 198.168.0.2

meshtastic --set mqtt_server mqtt.mydomain.com

:::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. :::

mqtt_password

MQTT password to use (most useful for a custom MQTT server). If using a custom server, this will be honoured even if empty. If using the default server, this will only be honoured if set, otherwise the device will use the default password (TODO - find default password).

mqtt_username

MQTT username to use (most useful for a custom MQTT server). If using a custom server, this will be honoured even if empty. If using the default server, this will only be honoured if set, otherwise the device will use the default username (TODO - find default username).

uplink_enabled

This is a channel specific setting. If your channel has this set to true and you are connected to WiFi, the device will forward along messages to whatever MQTT server is specified in mqtt_server.

downlink_enabled

This is a channel specific setting. If your channel has this set to true and you are connected to WiFi, the device will forward along messages from the MQTT server specified here to the mesh from this device.

Details

Examples

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

meshtastic --set mqtt_server 192.168.123.234

meshtastic --ch-set uplink_enabled true --ch-set downlink_enabled true --ch-index 0

mosquitto_sub -h 192.168.123.234 -v -t msh/#

:::note FIXME some documentation says msh/# , some says mesh/# . As of 1.2.39 the messages are on msh/# :::

:::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. :::