HMR3200/HMR3300 are Honeywell's electronic compass solution modules for navigation and guidance systems. HMR3200/HMR3300 have a direction accuracy of 1 °, a resolution of 0.1 ° and a repeatability of 0.5 °. HMR3300 has a tilt range of ±60 ° (pitch / roll), is small in size (25mm x 37mm x 10mm), light in weight, has compensation for hard magnetic interference, ferromagnetic object interference and discrete magnetic fields, and has a response speed of 15Hz. It has a working temperature range of -40 ° C to +85 ° C and 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 magnetic field with a range of ±2 Gauss and provide tilt angle measurement up to ±60°.
The document includes electrical specifications, pin assignments, UART and SPI communication protocols, command formats, and information about the demo development kit that accompanies the modules. This manual is written in Chinese.
| Repeatability | 0.5° |
|---|---|
| Tilt angle measurement range | ±60° |
| Module size | 25 mm × 37 mm × 10 mm |
| Weight (HMR3200) | 7.25 g |
| Supply voltage | 6‑15 VDC |
| Operating temperature | -40 °C to +85 °C |
| Maximum magnetic field strength | ±2 Gauss |
| Update rate (HMR3200) | 15 Hz |
| UART baud rate range | 2400‑19200 bps |
| UART frame format | 1 start, 8 data, 1 stop, no parity |
The modules operate from a single 6‑15 VDC power source.
UART uses ASCII format with 1 start bit, 8 data bits, 1 stop bit, no parity, and selectable baud rates from 2400 to 19200 bps.
The HMR3300 provides a tilt‑angle measurement range of ±60° for pitch and roll.
The HMR3200 updates at 15 Hz.