Deprecated in favor of LoraConfig.channel_num
If true, messages seen on the internet will be forwarded to the local mesh.
Used to construct a globally unique channel ID. The full globally unique ID will be: "name.id" where ID is shown as base36. Assuming that the number of meshtastic users is below 20K (true for a long time) the chance of this 64 bit random number colliding with anyone else is super low. And the penalty for collision is low as well, it just means that anyone trying to decrypt channel messages might need to try multiple candidate channels. Any time a non wire compatible change is made to a channel, this field should be regenerated. There are a small number of 'special' globally known (and fairly) insecure standard channels. Those channels do not have a numeric id included in the settings, but instead it is pulled from a table of well known IDs. (see Well Known Channels FIXME)
OptionalmodulePer-channel module settings.
A SHORT name that will be packed into the URL. Less than 12 bytes. Something for end users to call the channel If this is the empty string it is assumed that this channel is the special (minimally secure) "Default"channel. In user interfaces it should be rendered as a local language translation of "X". For channel_num hashing empty string will be treated as "X". Where "X" is selected based on the English words listed above for ModemPreset
A simple pre-shared key for now for crypto.
Must be either 0 bytes (no crypto), 16 bytes (AES128), or 32 bytes (AES256).
A special shorthand is used for 1 byte long psks.
These psks should be treated as only minimally secure,
because they are listed in this source code.
Those bytes are mapped using the following scheme:
0 = No crypto
1 = The special "default" channel key: {0xd4, 0xf1, 0xbb, 0x3a, 0x20, 0x29, 0x07, 0x59, 0xf0, 0xbc, 0xff, 0xab, 0xcf, 0x4e, 0x69, 0x01}
2 through 10 = The default channel key, except with 1 through 9 added to the last byte.
Shown to user as simple1 through 10
If true, messages on the mesh will be sent to the public internet by any gateway ndoe
This information can be encoded as a QRcode/url so that other users can configure their radio to join the same channel. A note about how channel names are shown to users: channelname-X poundsymbol is a prefix used to indicate this is a channel name (idea from @professr). Where X is a letter from A-Z (base 26) representing a hash of the PSK for this channel - so that if the user changes anything about the channel (which does force a new PSK) this letter will also change. Thus preventing user confusion if two friends try to type in a channel name of "BobsChan" and then can't talk because their PSKs will be different. The PSK is hashed into this letter by "0x41 + [xor all bytes of the psk ] modulo 26" This also allows the option of someday if people have the PSK off (zero), the users COULD type in a channel name and be able to talk. FIXME: Add description of multi-channel support and how primary vs secondary channels are used. FIXME: explain how apps use channels for security. explain how remote settings and remote gpio are managed as an example