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126 lines
4.4 KiB
Plaintext
126 lines
4.4 KiB
Plaintext
---
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id: lora
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title: LoRa Configuration
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slug: /settings/config/lora
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sidebar_label: LoRa
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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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import LoRaRegions from '../../blocks/_lora-regions.mdx';
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The LoRa config options are: Region, Modem Preset, Max Hops, Transmit Power, Bandwidth, Spread Factor, Coding Rate, Frequency Offset, Transmit Enabled, Channel Number and Ignore Incoming Array. LoRa config uses an admin message sending a `Config.LoRa` protobuf.
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## LoRa Config Values
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:::note
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You must set your device's `lora.region` setting. This will ensure that you are operating within the legal limits for your area.
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:::
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### Region
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Sets the region for your node. Default is `unset`. As long as this is not set, the node screen will display a message and not transmit any packets.
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<LoRaRegions />
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### Modem Preset
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Use a sensible default for the modem. Default is `unset` which equates to `LONG_FAST`. Also 'Use Presets' has to be defined, which is the default. If 'Use Presets' is not defined, the modem will be configured manually with Bandwidth, Spread Factor, and Coding Rate.
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### Max Hops
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Maximum number of hops. This can't be greater than 7. Default is 3 which should be fine for most applications. _**Really, 3 is fine.**_
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### Transmit Power
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If zero then, use default max legal continuous power (i.e. something that won't burn out the radio hardware)
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In most cases you should use zero here. Units are in dBm.
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### Bandwidth
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Bandwidth in MHz
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Certain bandwidth numbers are 'special' and will be converted by the device firmware to the appropriate floating point value: 31 -> 31.25MHz
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### Spread Factor
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A number from 7 to 12. Indicates the number of chirps per symbol as 1<<spread_factor.
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### Coding Rate
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The denominator of the coding rate. ie for 4/5, the value is 5. 4/8 the value is 8.
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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.
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A frequency offset that is added to to the calculated band center frequency. Used to correct for crystal calibration errors.
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### Transmit Enabled
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Allows you to enable and disable transmit (TX) from the LoRa radio. Useful for hot-swapping antennas and other tests.
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Defaults to true
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### Channel Number
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This is controlling the actual hardware frequency the radio is transmitting on. A channel number between 1 and NUM_CHANNELS (whatever the max is in the current region). If this is ZERO/UNSET then the rule is "use the old channel name hash based algorithm to derive the channel number".
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### Ignore Incoming Array
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For testing it is useful sometimes to force a node to never listen to particular other nodes (simulating radio out of range). All nodenums listed in the ignore_incoming array will have packets they send dropped on receive (by router.cpp)
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## LoRa Config Client Availability
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<Tabs
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groupId="settings"
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defaultValue="apple"
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values={[
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{label: 'Android', value: 'android'},
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{label: 'Apple', value: 'apple'},
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{label: 'CLI', value: 'cli'},
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{label: 'Flasher', value: 'flasher'},
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{label: 'Web', value: 'web'},
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]}>
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<TabItem value="android">
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:::info
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LoRa Config options such as Region, Modem Preset, and Hop Limit can be configured on Android.
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1. Open the Meshtastic App
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2. Navigate to: **Vertical Ellipsis (3 dots top right) > Device Settings > LoRa Config**
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:::
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</TabItem>
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<TabItem value="apple">
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:::info
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Configuration of Region, Modem Preset and Hop Limit is available on iOS, iPadOS and macOS at Settings > Radio Configuration > LoRa.
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:::
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</TabItem>
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<TabItem value="cli">
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LoRa config commands are available in the python CLI. Example commands are below:
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| Setting | Acceptable Values | Default |
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| :----------: | :---------------------------------------------------------------------------: | :---------------: |
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| lora.modem_preset | `LONG_FAST`, `LONG_SLOW`, `VERY_LONG_SLOW`, `MEDIUM_SLOW`, `MEDIUM_FAST`, `SHORT_SLOW`, `SHORT_FAST` | `LONG_FAST` |
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| lora.region | `UNSET`, `US`, `EU_433`, `EU_868`, `CN`, `JP`, `ANZ`, `KR`, `TW`, `RU` ,`IN`, `NZ_865`, `TH`, `LORA_24` | `UNSET` |
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| lora.hop_limit | `1`,`2`,`3`,`4`,`5`,`6`,`7` | `3` |
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</TabItem>
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<TabItem value="flasher">
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:::info
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No LoRa config options are available in the Flasher.
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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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All LoRa config options are available in the Web UI.
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:::
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</TabItem>
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</Tabs>
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