Embedded protocols
This hub groups low-level calculators for Wi-Fi data-rate checks, firmware bring-up, serial traffic, I2C electrical limits, CAN timing, and STM32 timer configuration.
Calculate CRC-16/Modbus from ASCII or hex bytes and append the RTU low-byte/high-byte checksum to a request frame.
Find the safe I2C pull-up resistor window from NXP timing formulas and choose a standard E12 value.
Calculate CAN bus bit timing from controller clock, prescaler, propagation segment, phase segments, SJW, and target bitrate.
Calculate Wi-Fi PHY data rate from MCS, channel width, spatial streams, and guard interval, then estimate MAC goodput from airtime overhead.
Find STM32 timer prescaler and auto-reload values for a target frequency, including APB prescaler timer clock behavior.
Start with the calculator that matches the debug task, then use its formula notes, references, and related tools for adjacent checks. Wi-Fi and CAN tools help with rate and timing questions; CRC and I2C tools help validate frame bytes and electrical limits; the timer tool converts clock targets into register values.