Product Datasheet

Key Features

Modular multi-sensor platform (33 × 24 mm PCB) — options c / v / i / p / a / t combinable freely; ADC streaming up to 300 kSPS single-ch, 150 kSPS dual-ch, 37.5 kSPS 7-ch simultaneous; 2 Mbaud USB CDC, driver-free on Linux / Windows / macOS
Option v — Non-contact AC voltage: capacitive coupling probe, ±1000 V range
Option c — Clamp-type AC/DC current: ±50 A range with shielded transducer
Option i — Attitude module: ICM-42670 IMU, LIS3MDL mag, BMP581 baro, VL53L4CX LiDAR; onboard EKF at 2400.96 Hz
Option p — Dual phototransistor VIS (P cmd) + IR (Q cmd); up to 300 kSPS per channel or 150 kSPS simultaneous
Option a — Two 12-bit ADC inputs 0–3.3 V; 300 kSPS single or 150 kSPS simultaneous
Option t — Temp & humidity sensor: ±0.2 °C / ±2 %RH; ~18.76 Hz firmware update rate
MQ-series gas sensor — PCB footprint provided for direct solder-mount; accessible via 'G' / 'g' commands
ASCII command interface — single-character stream selection plus line-based EKF tuning; ADC, IMU, calibration, and tuning use the same USB port

Product Image

Interface — USB (USB Micro / SM04B-GHS-TBT *)

SM04B-GHS-TBT

1GNDGround

2D −Data Negative

3D +Data Positive

4VBUS+5 V (500 mA max)

Protocol: USB 2.0 High-Speed (12 Mbps)
Connector: USB Micro / SM04B-GHS-TBT *
Shield: Connected to chassis GND

* Mating connector: GHR-04V-2P

Brief Specification

MCUSTM32F446RE · Cortex-M4 · 168 MHz
USBFull-Speed 12 Mbps · CDC ACM · 2 Mbaud · driver-free
ADC (onboard)12-bit · 300 kSPS single / 150 kSPS dual / 37.5 kSPS ×7 ch
Supply4.75 – 5.25 V (USB bus) · 60 mA (typ) / 80 mA (max) all options active
PCB33 × 24 mm · 4 × M2 mounting holes
Op. temp.−20 to +70 °C
Option c — Current±50 A · Hall-effect · DC – 23 kHz · AC/DC
Option v — Voltage±1000 V AC · capacitive · <10 Hz – >100 kHz
Option i — Attitude6-axis IMU ±2000 °/s ±16 g · Mag ±16 G · Baro 300–1250 hPa · LiDAR 1–6000 mm · EKF 2400.96 Hz
Option p — PhotoIR 940 nm + VIS · 0603 SMD · up to 300 kSPS each
Option a — ADC ×20 – 3.3 V · 12-bit · up to 300 kSPS each
Option t — Temp/RH±0.2 °C / ±2 %RH (typ.) · −40 to +125 °C · 16-bit

Dimensions

Specification

MULTI-SENSOR TOOLKIT

Per-Function Specification Tables · SM3324 Product Datasheet Rev 1.0

General / Platform

Supply Voltage	4.75 – 5.25 V (USB bus)
Supply Current	60 mA (typ) / 80 mA (max)
Dimensions	33 × 24 ×24 mm
Mounting	4 × M3 corner holes — use non-magnetic (plastic / nylon) fasteners to avoid interference with the onboard magnetometer
Operating Temp.	−20 to +70 °C
Storage Temp.	−40 to +85 °C

USB Data Interface Performance

USB Standard	USB 2.0 Full-Speed (12 Mbps physical)
USB Class	CDC ACM — virtual COM port
Connector	USB Micro-B
Effective Data Rate	2 Mbaud (host streaming)
Host Buffer (recommended)	≥ 1 MiB receive buffer
Command Interface	ASCII command + LF (0x0A): single-char streaming commands, plus E-key-value line commands for EKF tuning
OS Support	Linux / Windows / macOS — driver-free
Frame Size	32 bytes = 16 × u16 little-endian
Frame Counter	16-bit, 1 bit embedded per word (LSB)
Max Forward Slip	8192 frames (USB drop tolerance)

Sampling

Single-ch. rate (high, uppercase)	300 kSPS
Single-ch. rate (low, lowercase)	18.75 kSPS
Dual-ch. rate (high)	150 kSPS each (interleaved)
Dual-ch. rate (low)	9.375 kSPS each
7-ch. rate (A command)	37.5 kSPS each
7-ch. rate (a command)	2.34375 kSPS each

Option C — Current Measurement (Clamp Meter)

Measurement Range	±50 A (AC or DC, non-invasive clamp)
Sensing Principle	Linear Hall-effect IC — ratiometric analog output (V = V_CC/2 + S·B)
Hall Sensitivity	8.15 mV/G (typ.) @ V_CC = 5 V
Analog Bandwidth	DC – 23 kHz (flat response)
Quiescent Current	3 mA @ V_CC = 5 V
Operating Temp (Hall IC)	−40 to +125 °C
Output Code Range	0 – 4095 (12-bit); mid-scale ≈ 2048 at zero current
Host Command — high speed	C → 300 kSPS
Host Command — low speed	c → 18.75 kSPS

Option V — Non-Contact Voltage Measurement

Measurement Range	±1000 V AC
Coupling Method	Capacitive — no galvanic connection to measured conductor
Signal Type	AC only (DC-blocked by capacitive coupling)
Frequency Response	<10 Hz – >100 kHz (analog front-end)
Front-End Noise	12 nV/√Hz input-referred
Front-End GBW	3.3 MHz; input offset <1 mV; CMRR 91 dB
ADC Output Code	0 – 4095 (12-bit); mid-scale ≈ 2048 at zero voltage
Host Command — high speed	V → 300 kSPS
Host Command — low speed	v → 18.75 kSPS

Option P — Dual Phototransistor (IR + VIS)

PT1 — Channel 1 (VIS) — Command P
Peak sensitivity wavelength	940 nm
Spectral response range	400 – 1100 nm
PT2 — Channel 2 (IR) — Command Q
Peak sensitivity wavelength	940 nm
Spectral response range	730 – 1100 nm
Commands
Host Command — PT1 (VIS) fast	P → 300 kSPS
Host Command — PT2 (IR) fast	Q → 300 kSPS
Host Command — dual fast	R → 150 kSPS each
Host Command — low speed	p / q / r → 18.75 / 18.75 / 9.375 kSPS

Specification

MULTI-SENSOR TOOLKIT

Per-Function Specification Tables including Option I · SM3324 Product Datasheet Rev 1.0

Option A — General-Purpose ADC × 2

Input Channels	ADC1 and ADC2 (independent)
Input Range	0 – 3.3 V
Resolution	12-bit (0–4095)
Input Impedance	2kohm
ADC1 fast / slow cmd	Y (300 kSPS) · y (18.75 kSPS)
ADC2 fast / slow cmd	Z (300 kSPS) · z (18.75 kSPS)
Dual simultaneous cmd	X (150 kSPS each) · x (9.375 kSPS each)
Connector	2.54 mm pin header

Option T — Temperature & Humidity Sensor

Temperature Range	−40 to +125 °C
Temperature Accuracy	±0.2 °C (typ.) / ±0.3 °C (max) at 25 °C
Humidity Range	0 – 100 %RH (non-condensing)
Humidity Accuracy	±2 %RH (typ.) / ±3.5 %RH (max)
Resolution	16-bit (temperature and humidity)
Measurement Rate	~18.76 Hz (firmware-configured; 1 sample per 128 EKF frames)
Output Format	i16 ×10 scaled in firmware
ⓘ The sensor itself supports −40 to +125 °C, but valid measurements across this range first require that the PCB body and MCU are within their operating temperature range (−40 to +70 °C). System operation outside that range is not guaranteed regardless of sensor capability.

Option I — Attitude Module

IMU — 6-axis MEMS (Gyroscope + Accelerometer)
Gyro full scale	±2000 °/s
Accel full scale	±16 g
Gyro noise density	0.004 °/s/√Hz (typ.)
Accel noise density	70 μg/√Hz (typ.)
Configured ODR	1.6 kHz (gyro + accel simultaneous)
Magnetometer — 3-axis MEMS
Full scale	±16 gauss
Sensitivity @ ±16 G	1711 LSB/gauss
RMS noise (UHP mode)	3.2 mgauss X/Y · 4.1 mgauss Z
Configured ODR	80 Hz
Barometric Pressure Sensor
Pressure range	300 – 1250 hPa
Absolute accuracy	±0.30 hPa (±30 Pa)
Relative accuracy	±0.006 hPa → ±50 cm altitude equivalent
Configured ODR	~30 Hz (continuous mode)
LiDAR — Time-of-Flight Distance Sensor
Technology	dToF (direct Time-of-Flight), 940 nm VCSEL
Range	1 – 6000 mm
Field of view	18°
Multi-target detection	Up to 4 simultaneous targets
Configured ODR	~30 Hz (33 ms timing budget)
Firmware / Attitude Output
Attitude Estimation	Onboard EKF — Roll / Pitch / Yaw at 2400.96 Hz (×10 scaled i16)
O-command frame rate	2400.96 Hz — gyro/accel ICM ODR 1.6 kHz; mag read every 4 frames (600 Hz, hardware ODR 80 Hz); baro/LiDAR correction ~30 Hz; humidity/temp ~18.76 Hz
Frame Format	32 bytes = 16 × int16 LE — see Frame Format Reference (p. 4)

Mode Reference

MULTI-SENSOR TOOLKIT

USB Command Table · Frame Format · SM3324 Product Datasheet Rev 1.0

USB Command Table — Send ASCII command text + LF (\n) to the CDC COM port. Host baud setting is a placeholder; transport is USB Full-Speed virtual serial.

Cmd	Channel(s)	Rate (per ch.)	Option	Notes
Single Channel — High Speed (uppercase)
V	Voltage	300 kSPS	v	Non-contact; STFT display available
C	Current (clamp)	300 kSPS	c	Clamp meter; STFT display available
Y	ADC1	300 kSPS	a	GP ADC input 1; STFT available
Z	ADC2	300 kSPS	a	GP ADC input 2; STFT available
P	PT1 (VIS)	300 kSPS	p	VIS phototransistor; STFT available
Q	PT2 (IR)	300 kSPS	p	IR phototransistor; STFT available
G	Gas sensor	300 kSPS	—	Gas sensor footprint; sensor not included
Dual Channel — High Speed (interleaved u16)
F	Voltage + Current	150 kSPS each	v+c	CH1, CH2, CH1, CH2 … interleaved
X	ADC1 + ADC2	150 kSPS each	a	Interleaved u16
R	PT1 (VIS) + PT2 (IR)	150 kSPS each	p	Interleaved u16
Low-Speed Equivalents (lowercase = ÷16 divider)
v c y z p q g	Same as uppercase pairs	18.75 kSPS	—	Single channel, low speed
f x r	Same dual pairs as F X R	9.375 kSPS each	—	Dual channel, low speed
All-Channel Combined
A	V C ADC1 ADC2 PT1 PT2 Gas	37.5 kSPS each	all	16-byte frames; word[0]=header, word[1..7]=ch
a	Same 7 channels	2.34375 kSPS each	all	Low-speed combined
Attitude / IMU Mode (Option I)
o	Stop all output + IMU reset	—	i	Send first, wait ≥ 110 ms, then send O
O	IMU attitude only	2400.96 Hz	i	32-byte frame, 16 × i16; EKF frame rate — individual sensor update rates vary (see frame map p. 4); requires prior L calibration
Calibration (Option I)
L	IMU / Mag calibration	—	i	Interactive 3-phase session (Gyro → Accel 6-face → Mag rotation); results saved to Flash. Advance each phase with Enter / LF.
EKF Runtime Tuning (Option I)
E?	Read all EKF tuning values	—	i	Returns function-level parameter names and current RAM values. No raw sensor part names are used.
E key value	Set one EKF parameter	—	i	Applies immediately to RAM. Example: `E heading_noise 0.15`
s	Save settings to Flash	—	i	Persists current calibration and EKF tuning values across power cycles. Stop command is `o`, not `s`.

Frame Format Reference

MULTI-SENSOR TOOLKIT

USB Data Frame Structure · ADC Modes · IMU Mode · SM3324 Product Datasheet Rev 1.0

Frame Types

Single-ch V C Y Z P Q G (high rate) / v c y z p q g (÷16 rate) — 32 bytes = 16 × uint16

[n]	Field	Divisor	Unit	Range / Notes
[0–15]	CH sample n	—	raw	bits[15:1] = 12-bit ADC value (0–4095) · bit[0] = frame counter bit n (CTR[n]) · all 16 words carry the same selected channel

Dual-ch F X R (high rate) / f x r (÷16 rate) — 32 bytes = 16 × uint16 interleaved

[n]	Field	Divisor	Unit	Range / Notes
[0, 2, …, 14]	CH1 samples 0–7	—	raw	bits[15:1] = 12-bit ADC · bit[0] = CTR[n] · even words (n = 0, 2, …, 14)
[1, 3, …, 15]	CH2 samples 0–7	—	raw	bits[15:1] = 12-bit ADC · bit[0] = CTR[n] · odd words (n = 1, 3, …, 15)

All-ch A (high rate) / a (÷16 rate) — 16 bytes = 8 × uint16

[n]	Field	Divisor	Unit	Range / Notes
[0]	Frame counter	—	—	16-bit rolling counter (0 – 65535); full word, no ADC encoding
[1]	V channel	—	raw	12-bit ADC; non-contact voltage front-end
[2]	C channel	—	raw	12-bit ADC; clamp-meter current (hall-effect)
[3]	ADC1	—	raw	12-bit; general-purpose ADC channel 1
[4]	ADC2	—	raw	12-bit; general-purpose ADC channel 2
[5]	PT1 (VIS)	—	raw	12-bit; phototransistor 1 — VIS, cmd P (400–1100 nm)
[6]	PT2 (IR)	—	raw	12-bit; phototransistor 2 — IR, cmd Q (730–1100 nm)
[7]	Gas	—	raw	12-bit; gas sensor channel

uint16 Word Structure (ADC Modes)

Bits [15 : 1]	Bit [0]
14-bit ADC sample value · physical value = word >> 1 · range 0 – 16 383	CTR[n]

Frame counter — 16-bit value distributed across the LSB of all 16 words in the frame (n = word index 0–15):

ctr = (w[0]&1) | (w[1]&1)<<1 | (w[2]&1)<<2 | … | (w[15]&1)<<15

IMU Frame Map O mode — 32 bytes = 16 × int16, little-endian

[n]	Field	Divisor	Unit	Range / Notes
[0]	Humidity	÷ 10	%RH	0 – 100 %RH · ~18.76 Hz
[1]	Gyro X	—	raw	±2000 °/s · ICM ODR 1.6 kHz
[2]	Gyro Y	—	raw	±2000 °/s · ICM ODR 1.6 kHz
[3]	Gyro Z	—	raw	±2000 °/s · ICM ODR 1.6 kHz
[4]	Accel X	—	raw	±16 g · ICM ODR 1.6 kHz
[5]	Accel Y	—	raw	±16 g · ICM ODR 1.6 kHz
[6]	Accel Z	—	raw	±16 g · ICM ODR 1.6 kHz
[7]	Mag X	—	raw	±16 gauss · ODR 80 Hz
[8]	Mag Y	—	raw	±16 gauss · ODR 80 Hz
[9]	Mag Z	—	raw	±16 gauss · ODR 80 Hz
[10]	Roll	÷ 10	°	−180 to +180 · 2400.96 Hz
[11]	Pitch	÷ 10	°	−90 to +90 · 2400.96 Hz
[12]	Yaw	÷ 10	°	0 to 360 · 2400.96 Hz
[13]	Temperature	÷ 10	°C	−40 to +125 °C · ~18.76 Hz
[14]	Pressure	÷ 10	hPa	300 – 1250 hPa · ~30 Hz
[15]	Altitude	÷ 500	m	VKF · 2400.96 Hz (baro/LiDAR ~30 Hz)

All values are signed 16-bit integers, little-endian. Fields marked with a divisor are pre-scaled in firmware — divide the raw int16 by the stated value to obtain the physical quantity. Fields marked — carry raw sensor output in the configured full-scale range; refer to the sensor specification for the LSB-to-physical conversion.

EKF Architecture Note — 1/2

PAGE 5

Option I — Attitude Estimation · Architecture overview · SM3324 Product Datasheet Rev 1.0

Overview

Option I runs an on-chip Extended Kalman Filter that fuses inertial, magnetic, barometric, and LiDAR measurements into a continuous attitude and altitude estimate. All computation runs on the STM32 host MCU; no external co-processor. Outputs are delivered over USB at 2400.96 Hz in the O-mode frame format (words [1]–[15]).

State Vector
Orientation
Representation	Unit quaternion (internal); converted to Euler on output
Output	Roll, Pitch, Yaw — words [10][11][12], ÷10 → degrees
Inertial Biases
Gyro bias	3-axis; estimated online; seeded by L-command Phase 1
Accel bias	3-axis; seeded by L-command Phase 2 (6-face gravity)
Altitude Channel
States	Altitude, vertical velocity
Output	Altitude — word [15], ÷500 → metres

Sensor Roles
Propagation (prediction step)
Source	Gyroscope — drives quaternion kinematics equation
Rate	2400.96 Hz
Measurement updates (correction steps)
Accelerometer	Gravity-vector levelling — corrects roll & pitch; 2400.96 Hz
Magnetometer	Magnetic north reference — corrects yaw; 80 Hz (hardware ODR)
Barometer	Absolute altitude — corrects altitude state; ~30 Hz
LiDAR	Short-range altitude — corrects altitude state; ~30 Hz
Not used in EKF
Humidity / Temp	Reported in frame words [0][13] — no state correction role

Design Notes

Linearisation point	Error-state formulation: the filter tracks small perturbations around a nominal quaternion trajectory, keeping the covariance matrix Euclidean and avoiding singularities.
Update scheduling	Each sensor triggers its own measurement update asynchronously at its natural ODR. The propagation step runs every IMU cycle regardless of pending updates.
Magnetic disturbance	Mag update is gated: if the measured field magnitude deviates significantly from the calibrated reference norm, the update is skipped for that cycle.
Altitude fusion	Barometer and LiDAR corrections are applied independently. LiDAR is range-limited; barometer provides long-range absolute reference. No explicit sensor arbitration logic is exposed.
Calibration dependency	Gyro zero-bias and accel scale/offset seeds from the L-command calibration are loaded at startup. The filter diverges on yaw if mag hard/soft-iron correction (Phase 3) was not performed.
Noise tuning	Key EKF process, measurement, gate, and height-fusion parameters are adjustable at run time with `E key value`. Values are RAM-only until `s` is sent.

Note: This page describes the architectural role of each measurement class within the filter. Public EKF tuning keys are function-level names such as heading_noise or range_height_noise; raw sensor part names are intentionally not used as tuning keys.

EKF Runtime Tuning — 2/2

PAGE 6

Continued from EKF Architecture Note · Command E / Flash Save · SM3324 Product Datasheet Rev 1.0

Continuation: This is the second half of the EKF chapter. Architecture concepts remain on Page 5; runtime-adjustable parameters and commands are isolated here to keep the chapter readable.

Runtime Tuning Policy

EKF parameters are exposed for controlled integration tuning only. Values take effect in RAM immediately, but are not persistent until s is sent. Do not adjust these parameters without a repeatable test baseline; incorrect values can destabilise attitude or height estimation.

EKF Runtime Tuning — Commands E / s
Format	`E?` reads all RAM values; `E key value` changes RAM immediately; `s` saves current values to Flash. Power-up reloads the last saved Flash record.
Key	Default	Range	Purpose
att_proc	0.005	0.0005–0.05	Attitude prediction process noise
gyro_bias_rw	0.00001	0–0.001	Rate bias random-walk allowance
acc_bias_rw	0.0007	0–0.01	Acceleration bias random-walk allowance
level_noise	0.045	0.005–0.3	Gravity-level correction trust
heading_noise	0.12	0.005–0.5	Heading correction trust
heading_gate	16.3	3–50	Heading innovation rejection gate
air_height_noise	0.35 m	0.03–3.0	Air-pressure height correction trust
range_height_noise	0.05 m	0.005–1.0	Short-range height correction trust
range_max	4.0 m	0.2–6.0	Maximum distance accepted for range-height fusion
range_tilt_limit	30°	0–60	Tilt limit for range-height fusion
height_accel_gain	0.25	0–1	Vertical acceleration contribution to height prediction
height_proc	4.0	0.1–20	Height process noise
height_bias_rw	0.0015	0–0.05	Vertical acceleration bias tracking
terrain_rw	0.002	0–0.1	Ground-reference drift allowance
range_vel_noise	0.18 m/s	0.02–2.0	Range-derived vertical velocity damping
height_gate	4.0	1–10	Height innovation clamp/gate
heading_motion_xy	650	10–5000	Horizontal motion threshold for heading-bias observation
heading_motion_z	350	10–5000	Vertical-axis motion threshold for heading-bias observation
heading_bias_lpf	0.015	0.001–0.2	Heading-bias observer learning rate
heading_field_rw	0.000005	0–0.001	Reference heading-field drift allowance
heading_bias_rw	0.00001	0–0.001	Body heading-bias drift allowance
range_bias_rw	0.0001	0–0.01	Range offset drift allowance
height_vel_proc	0.12	0.02–2.0	Vertical speed process noise
height_pos_rw	0.001	0–0.1	Height position random-walk allowance

IMU / Mag Calibration — Command L
Trigger	Send `'L'` + LF while stream is stopped — STM enters interactive calibration mode and prints a menu
Phase 1 — Gyro	Place board motionless on a flat surface → press Enter → firmware collects gyro zero-bias samples → Gyro done
Phase 2 — Accel	6-face gravity calibration: present each face upward, press Enter per face (ACC 1/6 … ACC 6/6) → Accel done
Phase 3 — Mag	Rotate board slowly through all 3-D orientations → press Enter when all axes swept → Measured calibration:
Storage	Calibration offsets + scale factors are written to on-chip Flash by the calibration flow. EKF tuning values are written only when `s` is sent. If Flash fails, values apply in RAM only and are lost on power-cycle.
Prerequisite	O mode requires a stored calibration. Firmware returns `ERR IMU calibration missing` and stops output if none is found.

Dashboard Reference

PAGE 7

Browser-Based Test & Visualisation Tool · SM3324 Product Datasheet Rev 1.0

Overview

sm3324_dashboard.html is a self-contained, zero-install browser application for SM3324 development and testing. Open it in Edge or Chrome (Web Serial API required; Firefox not supported), click Connect Port, and select the SM3324 CDC ACM device. No driver installation is needed on any OS. Host baud-rate setting is irrelevant — the transport is USB Full-Speed virtual serial.

Connection & Streaming
Browser requirement	Chromium-based (Edge / Chrome) — Web Serial API
Connect flow	Click Connect Port → select SM3324 CDC ACM port → port opens at 2 Mbaud (host setting is a placeholder)
Start streaming	Click a mode button in the side panel (e.g. V 300k, O) — dashboard sends the corresponding ASCII command + LF automatically
Stop streaming	Click ■ Stop — sends `'o'` + LF; firmware halts output. `'s'` is reserved for Flash save.
IMU auto-init	Selecting O mode first sends `'o'`, waits 110 ms, then sends `'O'` — this reset sequence is mandatory for reliable IMU alignment
Frame sync	Dashboard scans all 32 byte offsets, locks on ≥ 6 consecutive valid counter frames before rendering

Waveform Display
ADC modes	Real-time oscilloscope-style trace; canvas redraws at display frame rate (~60 Hz), data ingested via Web Worker
IMU mode (O)	4 × 4 grid of mini-panels: Gyro XYZ, Accel XYZ, Mag XYZ, Roll/Pitch/Yaw, Temperature, Pressure, Humidity, Altitude — each with a rolling waveform
STFT panel	Short-Time Fourier Transform rendered below the ADC waveform; nperseg configurable (default 1024 samples); dB scale −100 to 0 dB; always active in single-channel modes
Gain / offset	Per-channel vertical scale and offset adjustable in the side panel

Capture & Export
Stream mode	Click ▶ Stream to begin continuous live display; no data is saved
Capture mode	Click ⏱ Capture to start recording aligned raw frames to memory; click again to stop and download
ADC export	Captured ADC frames saved as .wav (16-bit PCM, sample rate = active kSPS); compatible with Audacity, MATLAB, Python scipy
IMU export	Captured IMU frames saved as timestamped .csv with labelled columns (Gyro XYZ, Accel XYZ, Mag XYZ, Roll, Pitch, Yaw, Pressure, Temperature, Humidity, Altitude)
Log	All commands sent and firmware responses printed to the in-page log console; calibration session has a separate resizable log pane
EKF tuning panel	Reads `E?`, sends `E key value` for all function-level parameters, and sends `s` to save them to Flash

IMU Calibration Wizard (Option I)
Access	Expand the Calibration panel in the side panel; click Start L Cal
Phase 1 — Gyro	Dashboard prompts: place board motionless → click Next (sends LF) → firmware reports Gyro done
Phase 2 — Accel	6-face gravity sequence: dashboard shows face index (1/6 … 6/6); click Next per face
Phase 3 — Mag	Slowly rotate board through all orientations → click Next; firmware reports Measured calibration:
Result	Dashboard displays Flash write OK (persists across power cycles) or Flash write FAILED (RAM only — recalibrate on next power-up)
Cal log	Full calibration session transcript saved via Save Cal Log for offline review

Ordering Information

MULTI-SENSOR TOOLKIT

Part Number · Options · Pricing · Contact · SM3324 Product Datasheet Rev 1.0

Part Number Naming Rule

SM

Sensor
Module

3324

PCB Size
33×24 mm

-

C

Clamp
Current

V

Voltage
Sensor

I

Attitude
Module

P

Photo
Sensing

A

ADC ×2

T

Temp &
Humidity

-

X

Country

Option codes are combined in any order and any subset. Omit codes for modules not required.

Sensor Options

CClamp current meter (±50 A)

VNon-contact voltage (±1000 V AC)

IAttitude (IMU + Mag + Baro + LiDAR)

PPhototransistor ×2 (IR + VIS)

AGeneral-purpose ADC ×2

TTemperature & humidity sensor

Country of Origin

CChina

KKorea

XUnspecified

Examples

SM3324-CV-XVoltage + Current only

SM3324-I-XAttitude module only

SM3324-CVIPAT-XAll options installed

Pricing Reference

Part Number	Description	Qty	Unit Price
SM3324-A-X	Base — ADC option + MQ-series gas sensor footprint	1 pcs	US$ 50
+ Option C	Clamp current sensor add-on	—	+ US$ 100
+ Option V	Non-contact voltage sensor add-on	—	+ US$ 80
+ Option I	Attitude module add-on — IMU + magnetometer + barometer + LiDAR + EKF	—	+ US$ 200
+ Option P	Dual phototransistor add-on	—	+ US$ 20
+ Option T	Temp & humidity sensor add-on	—	+ US$ 30
SM3324-CVIPAT-X	Full configuration — all options (A + C + V + I + P + T)	1 pcs	US$ 480

ⓘ Partial-option configurations (any subset of A / C / I / P / T / V) are available at a lower price — contact us for a quote. ✉ hyon646@gmail.com

◉ Volume orders and corporate/laboratory purchases qualify for discounts and dedicated technical support.

How to Order

Select the required option codes using the Part Number Naming Rule above and specify the country of manufacture when placing an order.

Lead Time (stock)	1 – 3 business days
Lead Time (order)	4 – 6 weeks
Minimum Order Qty	1 pcs (standard) · 10 pcs (volume)
Payment	PayPal · Bank Transfer · Other (on request)
Shipping	Worldwide · DHL / FedEx / EMS
Contact	hyon646@gmail.com

Engineering Sample Notice
The SM3324 was developed as an internal engineering sample and research tool. Units are available for direct order in any populated option combination. If your application requires custom sensor channels, modified connectors, different PCB dimensions, firmware customisation, or integration into a larger assembly — custom production orders are accepted. Contact the sales team with your specifications.

ProductDatasheet

Specification

Specification

Mode Reference

Frame Format Reference

EKF Architecture Note — 1/2

EKF Runtime Tuning — 2/2

Dashboard Reference

Ordering Information

Product
Datasheet