Expand description
A BME280 that is not there.
Standing a part up to run a driver against used to mean writing out its side of the conversation: the chip id, two calibration blocks, a status register, and eight burst bytes, as literals, in the order the datasheet lists them. That is a lot of bytes to get right before a driver has been run once, and it is the same bytes every time.
This is that part, already answering. part hands back something a Bme280 can be
pointed at, holding a real calibration and a reading. reporting builds one that reads
whatever you ask it for, by working out the raw values the compensation turns back into
that reading.
The calibration here was read from a real BME280, and BURST is one measurement that
part took. Together they compensate to 20.44 C, 848.05 hPa, and 44.65 %.
Constants§
- BURST
- One measurement that part took, as the eight data registers hold it.
- CALIBRATION
- The temperature and pressure calibration a real BME280 holds.
- CALIBRATION_
HUMIDITY - The humidity calibration that goes with it.
- STATUS_
IDLE - The status a part reports when it is neither measuring nor loading its calibration.
Functions§
- burst_
for - The eight data registers that compensate to a reading.
- calibration
- The calibration these registers decode to.
- part
- A BME280 answering at an address, holding a real calibration and one measurement.
- registers_
of - The eight data registers a raw measurement sits in.
- reporting
- A BME280 that reads what you ask it to.