Internal Characteristic.Write calls CharacteristicConfig.WriteEvent which could lead to an infinite loop

[skast96]

Hello,

I have a specific case where the call of Characteristic.Write can lead to a infinite loop. A write call updates a UART device with new values. The UART device sends back the acknowledgement of those values, which I set to the newest characteristic value, which I can only set with Characteristic.Write. This leads to an infinite loop.

I forked the repository and added this

// UpdateValue replaces the characteristic value with a new value without handling write callbacks
func (c *Characteristic) UpdateValue(p []byte) (n int, err error) {
	if len(p) == 0 {
		return 0, nil // nothing to do
	}

	c.handle.Properties.Value = p
	c.handle.DBusProperties().Instance().Set(c.handle.Interface(), "Value", dbus.MakeVariant(p))
	return len(p), nil
}

I wanted to know if that happened to anyone else and if there is a better way to solve that issue.