Add a telemetry screen for messages, add mute option

[fnoop]

It would be nice to have a visual messaging system with the option of muting voice alerts. There are a few scenarios where voice alerts disturb the environment (either people or animals, and my wife during development). It would be great to have either a single line on the main telemetry screen for displaying current messages, or else a separate telemetry screen (there used to be one, it was very useful for displaying history of messages on taranis while flying).

[markmach]

The other one also showed the time in seconds since the message was displayed, and each line would update, I don't know how taxing that is on the system but I think just a time stamp next to the message would be fine

[Clooney82]

Mute option is now added in s-c-l-v-rc-opentx2.1-next branch.
Displaying Messages is still open. Had an idea how to implement this, but this is not working in openTX 2.1. maybe I´ll find a solution in future.

[Clooney82]

Now it is possible to show text messages with s-c-l-v-rc-opentx2.1-next branch on Taranis.
See commit: 91f502d
But you need a new Telemetry Sensor on Taranis.
Name: MSG
Type: Sensor
ID: 0600 6
Unit: %

[lvale]

Just as a heads-up, regarding the messages from the flight controller.
I've just submitted a large commit to ArduPilot master, that uniformizes all the messages sent by the flight controller, to the standard set by MAV_SEVERITY

I believe this makes it quite easier to parse and decide which should be displayed and/or spoken.

Severity Debug (7) is not used

All the PreArm and Arm prefixes are still on Critical severity.

0 MAV_SEVERITY_EMERGENCY System is unusable. This is a "panic" condition.

1 MAV_SEVERITY_ALERT Action should be taken immediately. Indicates error in non-critical systems.

2 MAV_SEVERITY_CRITICAL Action must be taken immediately. Indicates failure in a primary system.

3 MAV_SEVERITY_ERROR Indicates an error in secondary/redundant systems.

4 MAV_SEVERITY_WARNING Indicates about a possible future error if this is not resolved within a given timeframe. Example would be a low battery warning.

5 MAV_SEVERITY_NOTICE An unusual event has occured, though not an error condition. This should be investigated for the root cause.

6 MAV_SEVERITY_INFO Normal operational messages. Useful for logging. No action is required for these messages.

7 MAV_SEVERITY_DEBUG Useful non-operational messages that can assist in debugging. These should not occur during normal operation.

[Clooney82]

could you pls give us a link to your commit?

[lvale]

Here goes:
ArduPilot/ardupilot#3118
ArduPilot/ardupilot#3117
ArduPilot/ardupilot#3116
ArduPilot/ardupilot#3112

or

https://github.com/diydrones/ardupilot/pulls?q=is%3Apr+is%3Aclosed+author%3Alvale

All the commits are already on master

[athertop]

Initial implememtation of a messaging screen just committed (this is Clooney's version from the -next branch). No mute option implemented yet in 2.1 repo.