Feature Request - Schraeder EG53MA4 support

[shininghero]

Frequency: 315MHz US, 433.92 Europe
Modulation: OOK/ASK, standard Manchester encoding
Symbol size: 250us per each 01/10 Manchester bit.

Data Layout:

Preamble: 5 bytes, all zero.
Flags: 4 bytes. Full purpose still unknown even to the rtl_433 devs.
Tire ID: 3 bytes.
Pressure: 1 byte. 1 bit per 25 millibars, or 2.5 kPa. e.g. 0x50=200kPa.
Temperature: 1 byte. No math, just integer Fahrenheit.
Checksum: 1 byte. Modulo 256 of bytes from flags to temperature.

|  PPPPPPPPPP  |  FFFFFFFF  |  IDIDID  |  PP  |  TT  |  CC  |
|  0000000000  |  4D930060  |  ------  |  --  |  --  |  --  |

Sample file and specs:

6x pulses, with 110ms gaps, containing preamble, sync, and the following data:

• Tire ID: 0x56ECB0
• Pressure: 0xF0 (600kPa/96PSI)
• Temperature: 0xD4 (212F)
• Checksum: 0xF6

TPMS Left Rear High Pressure.txt