A
Anonymous
Mar 23, 2026
Rating: 4/5
Good sensor, minor docs issue
Accuracy is great but the AT command list could be more detailed in the datasheet.
Description
Hall Effect Sensor Module with Digital Display for Magnetic Field Strength Detection, Bare Board, Supports Modbus and AT Protocols
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 3.3V to 5.0V DC |
| Communication Protocol | Modbus RTU & AT Commands |
| Magnetic Sensing Range | ±2000 Gauss |
| Output Interface | UART / TTL Logic |
| PCB Length | 25.4 mm |
| PCB Width | 15.2 mm |
| Operating Temperature | -40°C to 85°C |
| Current Consumption | 12mA (Active) |
| Connector Pitch | 2.54mm Header |
| Package Weight | 8 grams |
5 reviews
A
Anonymous
Feb 16, 2026
Rating: 5/5
Perfect for IoT projects
Works flawlessly with my ESP32 setup. Modbus implementation is stable and easy to configure.
A
Anonymous
Feb 03, 2026
Rating: 5/5
Great value for money
Cheap and effective. The bare PCB makes it easy to integrate into custom housings.
A
Anonymous
Jan 19, 2026
Rating: 3/5
Needs external pull-ups
Works well but remember to add pull-up resistors on the UART lines for long runs.
A
Anonymous
Jan 18, 2026
Rating: 5/5
Reliable magnetic detection
Used this for a speed counter application. Very consistent readings over time.
5 FAQ
Q: How do I calibrate the zero point?
A: Send the AT ZERO command while away from magnetic fields to reset the baseline.
Q: Does it support I2C?
A: This model supports UART Modbus and AT commands. I2C is not available on this version.
Q: What is the default baud rate?
A: The default baud rate is 9600bps. You can change it via AT commands.
Q: Is this waterproof?
A: No, this is a bare PCB module and should be enclosed for protection against moisture.
Q: Can I power it with 3.3V?
A: Yes, the operating voltage range includes 3.3V logic levels.
![[Corrosion-Resistant] DFRobot Capacitive Soil Moisture Sensor Module Dry/Wet Detection](https://www.gosteppe.com/cache/medium/product/3259/legacy-main-2f0d3454b36b32391d263648.webp)
