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Implement simple ReadEvent #95

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Implement simple ReadEvent #95

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1 change: 1 addition & 0 deletions gatts.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ type CharacteristicConfig struct {
Value []byte
Flags CharacteristicPermissions
WriteEvent func(client Connection, offset int, value []byte)
ReadEvent func(client Connection) ([]byte, error)
}

// CharacteristicPermissions lists a number of basic permissions/capabilities
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9 changes: 9 additions & 0 deletions gatts_linux.go
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@@ -1,3 +1,4 @@
//go:build !baremetal
// +build !baremetal

package bluetooth
Expand Down Expand Up @@ -83,6 +84,14 @@ func (a *Adapter) AddService(s *Service) error {
})
}

// Lazy read value
if char.ReadEvent != nil {
callback := char.ReadEvent
bluezChar.OnRead(func(c *service.Char, options map[string]interface{}) ([]byte, error) {
return callback(0)
})
}

// Add characteristic to the service, to activate it.
err = bluezService.AddChar(bluezChar)
if err != nil {
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