HMR3200/HMR3300 is an electronic compass solution module from Honeywell for navigation and guidance systems. It has a direction accuracy of 1°, a resolution of 0.1°, a repeatability of 0.5°, a ±60° tilt (pitch/roll) measurement range, a small size and light weight, and has compensation for hard magnetic interference, ferromagnetic object interference, and discrete magnetic fields. It has a response speed of 15Hz and a temperature range of -40°~+85°C. It is powered by a single power supply of 6-15VDC.
This manual describes the Honeywell HMR3200 and HMR3300 digital compass modules, which offer compact size (25 mm × 37 mm × 10 mm) and low weight (≈7 g). The devices measure three‑axis magnetic fields with a range of ±2 Gauss and provide tilt‑angle measurement up to ±60°.
The document details electrical requirements (6‑15 VDC supply), UART and SPI communication protocols, pin assignments, and example command formats for direction and magnetic‑field output. It also lists the available demo kits and software support for easy integration into navigation and guidance systems. This manual is written in Chinese.
| Tilt‑angle range | ±60° |
|---|---|
| Module size | 25 mm × 37 mm × 10 mm |
| Weight (HMR3200) | 7.25 g |
| Operating temperature (HMR3200) | -40 °C to +85 °C |
| Supply voltage | 6‑15 VDC |
| Magnetic field range | ±2 Gauss |
| Update rate (HMR3200) | 15 Hz |
| UART baud rate | 2400‑19200 bps |
| SPI pin 1 function | SCK – serial clock output |
The HMR3200 operates from –40 °C to +85 °C, while the HMR3300 operates from –20 °C to +70 °C.
It requires a single‑supply voltage of 6 V to 15 V DC.
The module uses an ASCII UART interface with 1 start bit, 8 data bits, 1 stop bit, no parity, and selectable baud rates from 2400 to 19200 bps.
The sensor measures magnetic fields up to ±2 Gauss.