Posts by Haseem Ajaz

Decode OPT3001 exponent and mantissa data, track conversion-ready status and test optical-window effects before using lux thresholds.

Use ADS1118 SPI conversions with verified configuration, bounded analog inputs and distinct decoding for ADC and internal temperature results.

Configure INA228 shunt calibration, signed data and accumulation state to create bounded low-voltage current, power, energy and charge records.

Capture MAX30102 red and infrared data with safe board identification, FIFO checks and optical-quality flags before attempting pulse estimation.

Choose a Si5351 variant, reference and output plan, then verify PLL updates, logic loading and measured clock frequency without assuming RF purity.

Plan PCA9555 GPIO direction, output latches and interrupt servicing with register read-back, port-aware handling and safe external load drivers.

Use SGP40 raw VOC ticks with CRC checks, humidity inputs and the documented Gas Index Algorithm without confusing an index with gas concentration.

Separate BME680 gas resistance from processed air-quality estimates, with heater-status checks, environmental compensation and clearly labeled outputs.

Build a BMP390 pressure record with correct trim compensation, sampling choices and FIFO parsing before interpreting changes as altitude.

Use an SHT45 humidity sensor with checked CRC bytes, timed conversions and heater-aware logging, then evaluate placement inside the final enclosure.