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Add BR_902, Brazil 902MHz-907.5MHz #7399

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Add BR_902, Brazil 902MHz-907.5MHz #7399

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As reported by @barbabarros , the Brazilian government has specific support for LoRA[1] across multiple frequencies[2][3].

We currently support Brazil through the ANZ/AU915 band. However, Brazil also has another frequency available for use:

902 - 907.5 MHz , 1W power limit, no duty cycle restrictions

[1] https://sistemas.anatel.gov.br/anexar-api/publico/anexos/download/a028ab5cc4e3f97442830bba0c8bd1dd [2]
https://informacoes.anatel.gov.br/legislacao/resolucoes/2025/2001-resolucao-772 [3] https://informacoes.anatel.gov.br/legislacao/atos-de-certificacao-de-produtos/2017/1139-ato-14448#item10

Protobuf patch: meshtastic/protobufs#737

Fixes #3741

As reported by @barbabarros , the Brazilian government has specific support for LoRA[1] across multiple frequencies[2][3].

We currently support Brazil through the ANZ/AU915 band. However, Brazil also has another frequency available for use:

902 - 907.5 MHz , 1W power limit, no duty cycle restrictions


[1]  https://sistemas.anatel.gov.br/anexar-api/publico/anexos/download/a028ab5cc4e3f97442830bba0c8bd1dd 
[2] 
https://informacoes.anatel.gov.br/legislacao/resolucoes/2025/2001-resolucao-772 
[3] https://informacoes.anatel.gov.br/legislacao/atos-de-certificacao-de-produtos/2017/1139-ato-14448#item10

Protobuf patch: meshtastic/protobufs#737

Fixes #3741
@fifieldt fifieldt added requires-protos A change in device that requires changes to protobufs enhancement New feature or request labels Jul 21, 2025
@caveman99 caveman99 added the requires-docs Documentation must be updated label Jul 21, 2025
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Can you please add a PR to update the documentation with this new region?

@barbabarros
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fifieldt added a commit to fifieldt/meshtastic that referenced this pull request Jul 21, 2025
fifieldt added a commit to fifieldt/meshtastic that referenced this pull request Jul 21, 2025
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Add BR region
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