xdrv: tcp_bridge: Increase baudrate

[shantur]

On ESP32 TCP Serial bridge can support baudrate of more than 115200.

After this change the baudrate is still limited to 306000 due to uint_8 is used for settings->tcp_baudrate.

A 1.5Mbauds have been tested by changing uint_16 for settings->tcp_baudrate on ESP32

Description:

Related issue (if applicable): fixes #

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.6
• The code change is tested and works with Tasmota core ESP32 V.3.0.0
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass

[s-hadinger]

I'm afraid it's not that simple:

uint8_t       tcp_baudrate;              // F41

This means that the max allowed value for now is 306000. We can think of changing slightly the encoding above 96 (which represents 115200) to allow for higher rates. But changing the size of tcp_baudrate simply does not work, because is would change the alignment of all other settings.

Please come back with a better solution to encode differently above 96 and keep the settings in 8 bits.

[arendst]

I'll refactor the tcp_baudrate from uint8_t to uint16_t as I did long time ago for the other baudrates.

Hold your horses.

[arendst]

Implemented in v14.0.0.4