ID: 0xD210004
Sent on startup, on setting change, and when a CO2 message is received when CO2 is disabled (0x00 sent back)
Byte 0 is 0x01 if CO2 enabled, 0x00 otherwise
| Byte | Value |
|---|---|
| 0 | Enabled |
ID: 0xD210004
Byte 0 seems to have no effect Byte 0-1 is the CO2 concentration gas in mBar, in big endian format
| Byte | Value |
|---|---|
| 0 | Status? |
| 1-2 | PCO2 value |
ID: 0xD220004
Byte 0 is the calibration response, if it is 1 then the calibration succeeded, any non-zero response is interpreted as a fail.
Byte 1-2 is latest CO2 sample value
| Byte | Value |
|---|---|
| 0 | Calibration Ok |
| 1-2 | Value at end of calibration |
ID: 0xD230004
Byte 0-1 is the CO2 calibration gas in millibar?, in big endian format with 0xfd1 = 400 0x3761 = 1400, maybe multiplied by ambient pressure to get
| Byte | Value |
|---|---|
| 0- 1 | PCO2 calibration value |
t+46.74568 | rx id: 0xd230401; 0f,d1,
t+235.75949 | rx id: 0xd230401; 37,61,