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308 lines
8.3 KiB
Plaintext
308 lines
8.3 KiB
Plaintext
---
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id: channel-advanced
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title: 1.2 Channel Settings - Advanced
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sidebar_label: 1.2 Channel - Advanced
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---
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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:::warning
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These settings are for advanced users only. If you don't know what you are doing you could damage your radio or break local radio laws. Proceed with caution.
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:::
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## Overview
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Most users should not need to change these settings. The default [modem_config](channel#modem_config) settings should work just fine.
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## Settings
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| Setting | Acceptable Values | Default |
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| :--------------: | :------------------------------------------------------------------------------------------------: | :---------------------------: |
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| bandwidth | `10.4`, `15.6`, `20.8`, `31.25`, `41.7`, `62.5`, `125`, `250`, `500` | `125` |
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| channel_num | Depends on Region | Region Channel Number Default |
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| coding_rate | `5`, `6`, `7`, `8` | `5` |
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| frequency_offset | real numbers | `0` |
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| spread_factor | `7`, `8`, `9`, `10`, `11`, `12` | `7` |
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| tx_power | `0`, `2`, `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `13`, `14`, `15`, `16`, `17`, (dBm) | `0` |
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### bandwidth
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Total amount of spectrum used for the transmission.
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#### Set Bandwidth
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<Tabs
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groupId="settings"
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defaultValue="cli"
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values={[
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{label: 'CLI', value: 'cli'},
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{label: 'Android', value: 'android'},
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{label: 'iOS', value: 'iOS'},
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{label: 'Web', value: 'web'},
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]}>
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<TabItem value="cli">
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```shell
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meshtastic --ch-set bandwidth 125 --ch-index 0
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```
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</TabItem>
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<TabItem value="android">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="iOS">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="web">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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</Tabs>
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### channel_num
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An abstraction that maps to a specific center frequency used for transmission.
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#### Set Channel Number
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<Tabs
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groupId="settings"
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defaultValue="cli"
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values={[
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{label: 'CLI', value: 'cli'},
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{label: 'Android', value: 'android'},
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{label: 'iOS', value: 'iOS'},
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{label: 'Web', value: 'web'},
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]}>
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<TabItem value="cli">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="android">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="iOS">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="web">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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</Tabs>
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### coding_rate
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The amount of forward error correction applied to allow for us to automatically repair errors in the data transmission.
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#### Set Coding Rate
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<Tabs
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groupId="settings"
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defaultValue="cli"
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values={[
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{label: 'CLI', value: 'cli'},
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{label: 'Android', value: 'android'},
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{label: 'iOS', value: 'iOS'},
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{label: 'Web', value: 'web'},
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]}>
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<TabItem value="cli">
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```shell
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meshtastic --ch-set coding_rate 8 --ch-index 0
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```
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</TabItem>
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<TabItem value="android">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="iOS">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="web">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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</Tabs>
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### frequency_offset
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This parameter is for advanced users with advanced test equipment, we do not recommend most users use it. A frequency offset that is added to to the calculated band center frequency. Used to correct for crystal calibration errors.
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#### Configure frequency_offset
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<Tabs
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groupId="settings"
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defaultValue="cli"
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values={[
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{label: 'CLI', value: 'cli'},
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{label: 'Android', value: 'android'},
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{label: 'iOS', value: 'iOS'},
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{label: 'Web', value: 'web'},
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]}>
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<TabItem value="cli">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="android">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="iOS">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="web">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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</Tabs>
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### spread_factor
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LoRa is a spread spectrum technology. spread_factor is how much the signal is spread over the spectrum. SF8 = 2^8 or spread 256 times. SF12 = 2^12 or spread 4096 times.
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#### Set Spread Factor
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<Tabs
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groupId="settings"
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defaultValue="cli"
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values={[
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{label: 'CLI', value: 'cli'},
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{label: 'Android', value: 'android'},
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{label: 'iOS', value: 'iOS'},
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{label: 'Web', value: 'web'},
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]}>
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<TabItem value="cli">
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```shell
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meshtastic --ch-set spread_factor 12 --ch-index 0
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```
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</TabItem>
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<TabItem value="android">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="iOS">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="web">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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</Tabs>
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### tx_power
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Configured transmit power out of the LoRa radio, measured in dBM. Setting this to `0` will use the device default which is the max legal continuous power for your region.
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:::caution
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Ensure that you are not exceeding your country's regulations.
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`Country regulation - antenna gain = tx_power max setting`
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:::
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#### Set TX Power
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<Tabs
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groupId="settings"
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defaultValue="cli"
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values={[
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{label: 'CLI', value: 'cli'},
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{label: 'Android', value: 'android'},
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{label: 'iOS', value: 'iOS'},
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{label: 'Web', value: 'web'},
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]}>
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<TabItem value="cli">
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```shell title="Set Default"
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meshtastic --ch-set tx_power 0 --ch-index 0
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```
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```shell title="Set to 2dBM"
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meshtastic --ch-set tx_power 2 --ch-index 0
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```
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</TabItem>
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<TabItem value="android">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="iOS">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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<TabItem value="web">
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:::info
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Configuring this setting is not yet available for the selected platform. If this is incorrect please update the documentation for this page.
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:::
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</TabItem>
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</Tabs>
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