OBD-II vehicle data for ESP-IDF: read live PIDs, supported-PID maps, and DTCs from an ELM327 adapter over Bluetooth Classic SPP or BLE, or directly off the CAN bus via the on-chip TWAI controller. Shared decode layer, pluggable links, configurable via menuconfig.
Compact fixed-point math library for embedded systems. Integer-only with caller-selectable radix. Trig, log/exp, sqrt, hypot, wave generators, ADSR, and 2D transforms. Zero dependencies.