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Soldered 3-axis Magnetometer BMM350 Breakout

This breakout carries the Bosch BMM350, a sensor that measures the magnetic field on three axes. Use it to read a compass heading, detect a nearby magnet or map the field around your project. It talks over I2C (a two-wire bus for talking to chips) and has two Qwiic connectors, so you can plug it in without soldering.

The BMM350 breakout at an angle: purple board with a Qwiic connector on each side, a row of four pin holes labelled GND, 3V3, SDA and SCL, and two pin holes labelled AD and INT
Soldered 3-axis Magnetometer BMM350 Breakout
Top view of the breakout: GND, 3V3, SDA and SCL pins along the top edge, AD and INT at the bottom, a Qwiic connector on each side, jumpers JP1, JP2 and JP5 at the lower left and centre, JP3 and JP4 at the lower right
Top down
Bottom of the breakout with the Soldered logo, the product name and the marking I2C ADDR 0x14
Bottom up

The BMM350 covers ±2000 µT on every axis with a resolution of about 0.1 µT, at output data rates up to 400 Hz in normal mode. 400 Hz runs without averaging: the libraries start the sensor at 100 Hz with 4-sample averaging, and lower the averaging to 2 samples at 200 Hz and to none at 400 Hz. It also reports its own temperature, which the libraries use to compensate the readings. In normal mode at 100 Hz the sensor draws 350 µA with 4-sample averaging, the setting both libraries start it in, or 200 µA with 2-sample averaging (typical, 25 °C). In suspend mode it draws 1.8 µA (typical). These are figures for the sensor alone.

The board answers on I2C address 0x14, or 0x15 when you move the address jumper. An onboard 1.8 V regulator and an I2C level shifter let the header side run from 2 V to 5 V. A second 2-pin header brings out the sensor's INT (data-ready interrupt) and address pins at 1.8 V logic.

This documentation is for​

The BMM350 breakout at an angle: purple board with a Qwiic connector on each side, a row of four pin holes labelled GND, 3V3, SDA and SCL, and two pin holes labelled AD and INTProductSoldered 3-axis Magnetometer BMM350 BreakoutA Bosch BMM350 3-axis magnetometer breakout reading ±2000 µT over I2C, with two Qwiic connectors and a 2.54 mm header.SKU 333359ShopBuy it on our shopThe product's page in the Soldered shop.https://soldered.com/products/soldered-3-axis-magnetometer-bmm350-breakoutOpen the shop page

At a glance​

InterfaceI2C, address 0x14 (default) or 0x15; INT data-ready output
Main ICBosch BMM350, 3-axis magnetometer
Range±2000 µT on all axes, resolution about 0.1 µT
Output data rateUp to 400 Hz in normal mode, without averaging at 400 Hz (the libraries start at 100 Hz with 4-sample averaging)
Voltage2 V to 5 V on the header; the Qwiic connectors share the header's supply
Current350 µA at 100 Hz with the libraries' 4-sample averaging (200 µA with 2 samples), 1.8 µA in suspend (sensor, typical)
Connectors2x Qwiic, 4-pin and 2-pin 2.54 mm headers
Dimensions22 x 22 mm, two 3.2 mm mounting holes
EnvironmentsArduino library, MicroPython library

What's in the box​

QtyItemNotes
1Soldered 3-axis Magnetometer BMM350 Breakout (main product)333359
1Header pins (unsoldered)Header pins included for all breadboard-compatible pins