What changed,
release by release.

0.22.0

• Add sdcard from the SD SPI specification and an Apache-2.0 reference.

0.21.0

• Add scd4x from LibDriver (MIT).

0.20.0

• Add pir, a 6-sample trimmed-mean pyroelectric motion chain.
• Anonymize provenance references; remove internal project identifiers.

0.19.0

• Add modbus-rtu from the Modbus serial-line specification.

0.18.0

• Add mfrc522 from LibDriver (MIT).

0.17.0

• Add hd44780 from the HD44780 datasheet and the MIT 4-bit sequence.

0.16.0

• Add nrf24l01 from LibDriver (MIT).

0.15.0

• Add ina219 from LibDriver (MIT).
• Add mcp9808 from LibDriver (MIT).

0.14.0

• Add pcf8574 from LibDriver (MIT).
• Add hc-sr04 from LibDriver (MIT).

0.13.0

• Add sh1106 from the u8g2 SH1106 sequence (BSD-2-Clause).
• Add mcp4725 from LibDriver (MIT).

0.12.0

• Add mcp23017 from blemasle/arduino-mcp23017 (MIT).
• Add ads1115 from LibDriver (MIT).

0.11.0

• Add bme280 using the Bosch integer compensation formulas (BSD-3-Clause).
• Add adxl345 from LibDriver (MIT).

0.10.0

• Add stepper from laurb9/StepperDriver (MIT).
• Add hx711 from bogde/HX711 (MIT).
• Add max31855 from LibDriver (MIT).

0.9.0

• Add sht3x from DFRobot_SHT3x (MIT).
• Add aht20 from LibDriver (MIT).
• Add mcp2515 from autowp/arduino-mcp2515 (MIT).

0.8.0

• Add at24cxx from LibDriver (MIT).
• Add ds3231 from Adafruit RTClib (MIT).
• Add max7219 from wayoda/LedControl (MIT).
• Add pca9685 from LibDriver (MIT).
• Add mpu6050 from jrowberg/i2cdevlib and LibDriver (MIT).

0.7.0

• Add dht from the Adafruit DHT library behavior and the datasheets.
• Add rotary-encoder from the PaulStoffregen/Encoder state-table behavior.
• Add fir from the CMSIS-DSP Q15 form.

0.6.0

• Add biquad from the CMSIS-DSP Q15 form.
• Add ssd1306 from the u8g2 128x64 init sequence.

0.5.0

• Add pid, gamma-lut, crc32, and fixed-sqrt operators.
• Add adc-sampler, soft-pwm, and ds18b20 drivers.
• Sources and behavior references: Arduino PID (MIT), zlib (zlib license),

libfixmath (MIT), OneWire (MIT), Padauk examples, and the DS18B20 datasheet.

0.4.1

• Add compatibility metadata to every unit: C99, no allocation, no float,

and blocking behavior.

• Run the C unit tests in the release gate.

0.4.0

• Add the uart driver with a port and timeout.
• Add the ws2812 RGB/GRB driver with a timing port.
• Add the ir-capture falling-edge interval collector.

0.3.1

• Expand every unit README with application scenarios, parameters, memory,

timing, integration code, and when not to use.

• Add applications metadata to loom.json.

0.3.0

• Add mean, clamp-average, weighted-average, and clamp-debounce

from the Padauk Soft_Filter family.

• Add ir-nec-decode from the NEC protocol and a vendor IR example.
• Add the i2c-master driver core with a port and fake bus.

0.2.0

• Add trimmed-mean, debounce, hysteresis, key-fsm, crc16, and

ring-buffer.

• Add host tests for every unit.

0.1.0

• Add clamp, median, moving-average, and ema.