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3-Axis Magnetometer Unit - 3-axis magnetometer - BMM350 - M5Stack U231
M5Stack Unit 3-axis magnetometer with a BMM350 sensor: a compass with under 10° error after calibration.
- Connect it with a Grove cable to a controller with I2C, sold separately
- The set includes the module and a 5 cm Grove cable
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Magnetometer for a compass and field measurement
M5Stack Unit BMM350 is a 3-axis magnetometer with a BMM350 sensor in TMR technology. It measures the magnetic field on the X, Y and Z axes in a ±2000 μT range with a resolution of about 0.1 μT, and after calibration it determines heading with an error below 10°.
You read the module over I2C (address 0x14) at 100 or 400 kHz through a single Grove cable. In sleep mode it draws about 6.4 μA according to the manufacturer's measurements.
BMM350 Unit module with a TMR magnetometer and a Grove port
< 10°
heading error after calibration according to the manufacturer's measurements
0.1 μT
magnetic field measurement resolution
6.4 μA
sleep mode current according to the manufacturer's measurements
Botland is an official distributor of the M5Stack module family in Poland. We have extended this system of stackable functional devices with accessories from our range and numerous blog guides. All M5Stack products presented here are original.
Is it right for you?
A good choice if:
- You are building an electronic compass or robot navigation
- You want to measure the magnetic field on three axes
- You already have an IMU sensor and only need heading
Consider another option if:
- You also need an accelerometer and gyroscope in one module: choose Unit DoF9
- You need a position receiver with a magnetometer for a Core controller: GNSS module with barometer, IMU and magnetometer - M5Stack M135
Fun fact
A compass without a moving needle
BMM350 measures the Earth's magnetic field electrically, using tunnel magnetoresistance (TMR) technology. After calibration the manufacturer states a heading error below 10°.
Source: M5Stack: store, Unit BMM350 (EN)
Frequently asked questions
Does Unit BMM350 need calibration?
Yes, for heading measurement. The manufacturer states an error below 10° only after calibration.
How much current does the Unit BMM350 module draw?
About 6.4 μA in sleep and about 167 μA during continuous reading, according to the manufacturer's measurements.
Package contents
- 1 x Unit BMM350 module
- 1 x Grove HY2.0-4P cable 5 cm
Technical specifications
| Parameter | Value |
|---|---|
| Manufacturer | M5Stack |
| Manufacturer code | U231 |
| Sensor | BMM350, 3-axis TMR magnetometer |
| Range | ±2000 μT per axis |
| Resolution | approx. 0.1 μT |
| Heading accuracy | error < 10° after calibration |
| Interface | I2C, address 0x14, 100 or 400 kHz |
| Current | sleep 6.42 μA, continuous reading 167.02 μA |
| Operating temperature | -40 °C to 85 °C (chip) |
| Connector | Grove HY2.0-4P |
| Power supply | 5 V from the Grove port |
| Dimensions | 24 x 24 x 8 mm |
| Weight | 3.1 g |
Useful links
| Name | Value |
|---|---|
| Width | 13.8 cm |
| Height | 0.7 cm |
| Depth | 9.3 cm |
| Weight | 0.007 kg |
GLS
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from €8.07
The full delivery terms are on the page Delivery and payment.
30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
Complaints
If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
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Instructions and documents
GPSR data
Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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