Send error information to the server

[Eirenliel]

Right now when trackers error out they don't send any information to the server about the error. Send this info in some way (even just a text is fine, but also an error code for some common errors) so it can be displayed to the user.

[unlogisch04]

Can we define more exactly what is needed in addition?
The following i found, that could be the main issue for this issue?

• BNO08x seems to be implemented wrong if you disconnect the IMU. it will not set "SensorStatus::SENSOR_ERROR" but "SensorStatus::SENSOR_OFFLINE"

What errors are missing and would help to know in server?

• IMU not found
  • At startup, if a IMU is not found, only for optional false IMUs
  • Currently SensorStatus SENSOR_ERROR
• IMU not found but I2C scan found (not sure if we want to go into possible new subcategory)
  • At startup, or delayed (i2c scan not blocking now) would be a new error or status message
  • Currently:
    • SensorStatus SENSOR_ERROR (maybe broken on BNO?)
  • Devices found on the same i2c lines (1-10 results more would indicate a wiring/other issue)
  • Devices found on other i2c lines (1-10 results more would indicate a wiring/other issue)
  • Wiring issue
• Connection to IMU lost
  • Most likely on extension when unplugged while running
  • Sensor behave differently on that.
  • sendSensorError on some of the sensors (BNO085, ICM20948, softFusion) (only once) (WATCHDOG_TIMEOUT on ICM20948, softFusion)
  • BNO08x seems to be implemented wrong if you disconnect the IMU. it will not set "SensorStatus::SENSOR_ERROR"
• From IMU Send Error
  • Currently only used for BNO085, ICM20948, softFusion (only send once when the error occurs. no Buffering)
  • PacketErrorCode

Currently we have from UDP Tracker:

1. SensorStatus:
   -Implemented for all IMU
   -send on connect and on change
   https://github.com/SlimeVR/SlimeVR-Tracker-ESP/blob/main/src/sensors/sensor.h#L44-L48

enum class SensorStatus : uint8_t {
	SENSOR_OFFLINE = 0,
	SENSOR_OK = 1,
	SENSOR_ERROR = 2
};

2. PacketErrorCode:
   -Only used on BNO08x and ICM20948
   -Send only when sensor gives a error once not on reconnect,..
   https://github.com/SlimeVR/SlimeVR-Tracker-ESP/blob/main/src/network/packets.h#L85-L92

enum class PacketErrorCode : uint8_t {
	NOT_APPLICABLE = 0,
	POWER_ON_RESET = 1,
	INTERNAL_SYSTEM_RESET = 2,
	WATCHDOG_TIMEOUT = 3,
	EXTERNAL_RESET = 4,
	OTHER = 5,
};