This document introduces the features and characteristics of Honeywell Commercial Switch&Sensor products, including direction accuracy, resolution, repeatability, measurement range, size, and weight. The product has the ability to compensate for hard magnetic interference and discrete magnetic fields, and has a fast response speed and a wide operating temperature range. It is suitable for applications such as orientation and navigation, attitude reference, satellite antenna positioning, and platform leveling.
The HMR3200 and HMR3300 are compact solid‑state magnetic compass modules (25 mm × 37 mm × 10 mm) with low weight (7.25 g / 7.5 g) and high accuracy. They offer 1° direction accuracy, 0.1° resolution, and a ±60° tilt measurement range, while compensating for hard‑magnetic and ferrous interference. The modules operate from a single 6‑15 V DC supply and function over –40 °C to +85 °C.
Both devices support UART (ASCII) and SPI serial interfaces. UART operates at selectable baud rates from 2400 to 19200 bps, while SPI runs at 15 Hz (HMR3200) or 8 Hz (HMR3300). The manual details pin assignments, command formats for direction and magnetic field output, and includes a demo PCB kit with RS‑232 adapter and Windows software for development.
| Repeatability | 0.5° |
|---|---|
| Tilt range | ±60° |
| Size | 25 mm × 37 mm × 10 mm |
| Weight (HMR3200) | 7.25 g |
| Operating temperature | -40 °C to +85 °C |
| Supply voltage | 6 V–15 V DC |
| Magnetic field range | ±2 Gauss |
| UART baud rate | 2400–19200 bps |
| SPI update rate (HMR3200) | 15 Hz |
| SPI update rate (HMR3300) | 8 Hz |
The modules operate from –40 °C to +85 °C.
It requires a single supply of 6 V to 15 V DC.
Both UART (ASCII) and SPI interfaces are provided.
The magnetic field range is ±2 Gauss.