OpenELAB Wiki
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  • 1️⃣M5Stack
    • M5Stack Cardputer Kit w /M5StampS3
    • M5Stack Dial - ESP32-S3 Smart Rotary Knob
    • M5StickC PLUS2 ESP32 Mini IoT Development Kit
    • M5StickC PLUS ESP32-PICO Mini IoT Development Kit
    • M5Stack Core2 ESP32 IoT Development Kit for AWS IoT Kit
    • M5Stack Core2 ESP32 IoT Development Kit
    • M5Stack AtomS3 Lite ESP32S3 Dev Kit
    • M5Stack ATOMS3 Dev Kit w/ 0.85-inch Screen
    • M5Stack ATOM TailBat - Battery Accessory for ATOM
    • M5Stack ATOM Matrix ESP32 Development Kit
    • M5Stack ATOM Lite ESP32 IoT Development Kit
    • M5Stack ATOM Echo Smart Speaker Development Ki
    • M5Stack ENV III Unit with Temperature Humidity Air Pressure Sensor
    • M5Stack COMMU Module Extend RS485/TTL CAN/I2C Port
    • M5Stack ATOMIC PoE Base W5500
    • M5Stack Time-of-Flight Distance Unit (VL53L1X)
    • M5Stack LoRa Unit with Antenna(E220)
    • M5Stack Glass 2 Unit w/ 1.51inch Transparent OLED
    • M5Stack Temperature, Humidity, Pressure and Gas Sensor (BME688)
    • M5Stack Temperature Humidity Air Pressure Sensor (SHT40+BMP280)
    • M5Stack H-bridge Unit v1.1 (STM32F030)
    • M5Stack 8-Channel Servo Driver Unit (STM32F030)
    • M5Stack ATOMIC TTL-RS485 Base
    • M5Stack ATOMIC PortABC Extension Base
    • M5Stack Ext Encoder Unita (STM32F030)
    • M5Stack Single-phase DC SSR Unit (CDG1. 1DD-10A)
    • M5Stack Speaker 2 Hat (MAX98357)
    • M5Stack Glass Unit w/ 1.51inch Transparent OLED
    • M5StickC Vibration HAT
    • M5Stack RCA Audio/Video Composite Unit
    • M5Stack Barometric Pressure 2 Unit (QMP6988)
    • M5Stack 8-Angle Unit with Potentiometer
    • M5Stack 8-Encoder Unit (STM32F030)
    • M5Stack Flashlight Unit
    • M5Stack NCIR 2 Thermometer Unit (MLX90614)
    • M5Stack M5StickV K210 AI Camera (Without Wifi)
    • M5Stack Thermal Camera 2 Unit (MLX90640) -110 Degree FoV
    • M5Stack USB TypeC2Grove Unit
    • M5Stack Scales Unit with 20kgs Range (HX711)
    • M5Stack I/O Hub 1 to 6 Expansion Unit (STM32F0)
    • M5Stack Keyboard Programmable Unit V1.1 (MEGA8A)
    • M5Stack Red 7-Segment Digit Clock Unit
    • M5Stack Mechanical Key Button Unit
    • M5Stack ESP32 Ethernet Unit with PoE
    • M5Stack Encoder Unit
    • M5Stack MQTT PoE Unit with PoE Port
    • M5Stack Unit CamS3 Wi-Fi Camera 5MP
    • M5Stack Ultrasonic Distance Unit I2C
    • M5Stack Ultrasonic Distance Unit I/O
    • M5Stack Passive Buzzer Unit
    • M5Stack 2-Channel SPST Relay Unit
    • M5Stack Tube/Air Pressure Unit
    • M5Stack MQTT Unit with RJ45 Port
    • M5Stack Gesture recognition sensor
    • M5Stack Fader Unit with B10K Potentiometer
    • M5Stack I2C Hub 1 to 6 Expansion Unit
    • M5Stack Real Time Clock (RTC) Unit
    • M5Stack OLED Unit 1.3"Display
    • M5Stack RF UNIT 433MHz Transmitter
    • M5Stack ATOM Socket Kit
    • M5Stack Watering Unit with Mositure Sensor and Pump
    • M5Stack Digital RGB LED Strip
    • M5Stack M5StickC 18650C
    • M5Stack M5StickC SERVO HAT
    • M5Stack M5StickC Fingerprint HAT
    • M5Stack M5StickC ToF HAT
    • M5Stack Mini GPS/BDS Unit
    • M5Stack Finger Print Sensor Unit
    • M5Stack DAC Converter Digital
    • M5Stack RGB LED Unit
    • M5Stack Mini 3A Relay Unit
    • M5Stack Earth Moisture Sensor Unit
    • M5Stack Color Sensor RGB Unit
    • M5Stack Mini Angle Unit Rotary Switch
    • M5Stack PIR Motion Sensor
    • HEX RGB LED Board
    • M5Stack LoRa Module (433MHz) v1.1
    • M5Stack ATOMS3R Camera Kit
    • M5Stack ATOMS3R Development Kit
    • M5Stack Roller485 Lite Unit
    • M5Stack ATOMS3R Proto Kit
    • M5Stack M5Stamp Fly with M5StampS3
    • M5Stack M5Atom Joystick with M5AtomS3
    • M5Stack ATOMS3R Camera (OV3660)
    • M5Stack Battery Module
    • M5Stack Unit Cam Wi-Fi Camera
    • M5Stack PIR Motion Sensor
    • M5Stack RFID 2 Unit
    • M5Stack Mini Dual
    • M5StickV K210 AI Camera
    • M5Stack Glass 2 Unit
    • Hall Effect Unit
    • Voltage and Amperage Meter
    • M5Stack ENV Pro Unit
    • NCIR 2 Thermometer Unit
    • M5GO Battery Bottom2
    • M5Stack USB Module
    • M5Stack LoRa Module
    • M5Stack LLM Module
    • M5Stack Timer Power Unit
    • M5Stack 8-Encoder Unit
    • M5Stack LoRa Module
    • M5Stack 8-Angle Unit
    • Gesture recognition sensor
    • M5StickC ENV III HAT
    • M5StickC DAC 2 Hat
    • M5Stack Color Sensor
    • Time-of-Flight Distance
    • M5StickC ToF HAT
    • Neo HEX 37 RGB LED
    • M5Stamp ESP32S3
    • Tube/Air Pressure
    • 8-Channel Servo Driver
    • M5Stack Mini Angle Unit
    • M5Stack Mini Infrared Emitter
    • M5Stack NanoC6 Dev Kit
    • M5Stack ENV III Unit
    • Temperature Humidity Air Pressure
    • M5Stack 2-Channel SPST
    • M5Stack BLDC Motor
    • M5Stack Ultrasonic
    • M5Stack M5Stamp
    • M5Stack DAC
    • M5Stack Mini CAN Unit
    • M5Stack Ambient Light Sensor
    • M5Stack PIR Hat
    • M5Stack Speaker
    • M5Stack Weight
    • M5Stack Core2
    • M5StickC PLUS
    • M5Stack Barometric Pressure
    • M5Stack Ambient Light Sensor
    • M5Stack Passive Buzzer
    • M5Stack Mechanical Key Button
    • M5Stack Limit Switch
    • M5StickC Vibration HAT
    • PM5Stack RCA Audio/Video
    • M5Stack Flashlight
    • M5Stack COMMU Module Extend
    • M5Stack M5StampS3 with 1.27 Header Pin
    • M5Stack M5StampS3 with 2.54 Header Pin
    • ATOMIC Barcode/QR-Code Scanner
    • M5Stack Station ESP32 IoT
    • M5Stack ESP32 Core Ink
    • M5Paper ESP32 Development Kit
    • ATOMIC CANBus Base
    • M5Stack M5StickC ADC Hat
    • M5Stack LoRa
    • M5Stack H-bridge
    • ATOMIC GPS Base
    • M5Stack Ext Encoder
    • M5Stack Single-phase DC SSR
    • M5Stack Glass Transparent OLED
    • M5Stack Thermal Camera
    • M5Stack USB TypeC2Grove
    • M5Stack I/O Hub
    • M5Stack CardKB Mini Keyboard
    • M5Stack Red 7-Segment Digit Clock
    • M5Stack Extend I/O
    • M5Stack I2C Joystick
    • M5Stack ESP32 Ethernet
    • M5Stack 8-Channel Servo Driver
    • M5Stack Encoder
    • M5Stack MQTT PoE
    • M5Stack Ultrasonic
    • M5Stack I2C Hub
    • M5Stack MQTT
    • M5Stack Fader
    • M5Stack Real Time Clock
    • M5Stack OLED
    • M5Stack RF Unit
    • M5Stack Watering Unit
    • M5Stack Digital RGB LED
    • M5Stack JoyC Omni-directional Controller
    • M5Stack SERVO HAT
    • M5Stack Fingerprint HAT
    • M5Stack Finger Print Sensor
    • M5Stack RGB LED
    • M5Stack Mini 3A Relay
    • M5Stack Earth Moisture Sensor
    • M5Stack 1 to 3 HUB Expansion
    • M5Stack RS485 to TTL Converter
    • HEX RGB LED Board
    • M5Stack LoRa 433MHz with Antenna
    • M5Stack NB-IoT with Antenna
    • M5Stack Battery Bottom 110mAh
    • M5Stack Programmable Power Supply Module
    • M5Stack LAN Module
    • M5Stack RCA Audio/Video Module
    • M5Stack LAN Module W5500
    • M5Stack IoT Base
    • M5Stack AC Power Base
    • M5Stack GRBL Module Stepmotor Driver
    • M5Stack COM.LTE Module
    • M5Stack Proto Pegboard Module
    • M5Stack BaseX EV3 motor
    • M5Stack Proto Module
    • M5Stack M5GO/FIRE Battery
    • M5Stack PoE Camera with Wi-Fi
    • M5Stack UnitV K210 AI Camera
    • M5Stack UnitV2 M12 with Cameras
    • M5Stack ESP32 PSRAM Timer Camera Fisheye
    • M5Stack ESP32 PSRAM Timer Camera
    • M5Stack Universal IOT Experiment Kit
    • M5Stack Scale Kit
    • M5Stack AGV Mini Carkit Mecanum Wheels
    • M5Stack 6060-PUSH Linear Motion Control
    • M5Stack BugC2 w/ M5StickC PLUS2
    • M5Stack RoverC Pro
    • M5Stack BALA2 Fire Self-balancing Robot Kit
    • M5Stack 16 PCS M3 Screw
    • M5Stack Unbuckled Grove Cable
    • M5Stack RS485T T-Shaped Connector
    • M5Stack CM4Stack Development
    • M5Stack CoreS3 ESP32S3 loT Development
    • M5Stack M5StickC PLUS2 with Watch Accessories
    • M5Stack Mini GPS/BDS
    • M5Stack M5Stick T-Lite Thermal Camera
    • M5Stack UnitV2 - The standalone AI Camera
    • M5Stack ESP32 Fisheye Camera
    • M5Stack Voltage and Amperage Meter
    • M5Stack CardKB Mini Keyboard
    • M5Stack M5Stamp C3 (5pcs)
  • 2️⃣ESP
    • ESP8266EX
    • ESP8266 ESP-01S WiFi module
    • ESP32-WROOM-32E
    • ESP32-WROOM-32 Wifi Bluetooth Type-C Dev Kit
    • ESP32-S3-WROOM-1U
    • ESP32-S3-Nano - Development Board
    • ESP32-S3 Rotary Switch LCD 2.1 inch Round LCD Screen
    • ESP32-PICO-D4
    • ESP32-H2
    • ESP32-CAM Camera Module
    • ESP32-C6
    • ESP32 NODEMCU Module WiFi Development Board with CP2102
    • ESP32 D1 Mini Nodemcu Development Board
    • D1 Mini Nodemcu with ESP8266-12F WLAN module
    • D1 Mini V3 Nodemcu with ESP8266-12F WLAN module
    • Seeed Studio XIAO ESP32S3 WIFI Dev Board
    • XIAO SAMD21 Arduino Microcontroller
    • XIAO RP2040
    • XIAO ESP32-C3 WIFI
    • XIAO ESP32-C6 WIFI
    • 6x10 RGB MATRIX
    • XIAO nRF52840 Sense
  • 3️⃣DRONE / FPV
    • ZD850 850mm Compact Folding Hexacopter Drone Frame Kit Full Carbon Fiber
    • DXW 4114 400KV High Power Brushless Motors
    • DXW D4250 800KV 3-7S Brushless Motor
    • DXW D3536 1200KV 2-4S Brushless Motor
    • DXW A2212/C2826 3.17mm Outrunner Brushless Motor
    • Hobbywing Skywalker V2 Brushless ESC Speed Controller
    • Pixhawk PX4 Flight Controller
    • Holybro Pixhawk 6C
    • GPS Stand
    • Holybro GPS M8N
    • Holybro GPS M9N
    • Holybro GPS M10N
    • Radiolink M8N SE100 GPS Module
    • Radiolink M10N SE100 GPS for PX4/Pixhawk 2.4.8
    • Mateksys GNSS M9N-5883
    • MFD Crosshair Color OSD
    • 2 Pair Carbon Fiber CW CCW Propellers
    • 3-Axis Brushless Gimbal Frame With Motors & Storm32 Controller
    • 2-Axis Brushless Gimbal Frame With Motors & Storm32 Controller
    • RadioLink AT10 II 2.4Ghz 10CH RC Transmitter
    • Radiolink Mini PIX V1.2 Flight Controller M10N GPS TS100 SE100 (Pixhawk Alternative)
    • 2Pcs OVONIC 3S 4S 6S Lipo Battery For RC FPV
    • Gens ACE Lipo Battery with T/XT60 Plug
    • LiPo Battery 3S 11.1V for RC Drone
    • Holybro PM02 V3 Power Module 12S
    • Holybro PM06 V2 Power Module 14S
    • Holybro PM07 V2 Power Module 14S
    • Holybro Power Distribution Board (PDB)
    • Mateksys Power Distribution Board (PDB) XT60 W/ BEC 5V & 12V
    • Hawk eye FPV Monitor 5.8G 48CH 4.3 inch FPV HD Monito
    • RUSH TANK MAX SOLO 5.8GHz 2.5W High Power 48CH VTX Video Transmitter
    • RUSH TANK SOLO 5.8G VTX Video Transmitter CNC shell 1.6W
    • Happymodel EP1 Dual Receiver 2.4Ghz ExpressLRS RX
    • Mateksys BEC12S-PRO, 9-55V TO 5V/8V/12V-5A
    • ZD850 850mm 6-axis Drone with 6kg Payload
    • ZD550 550mm 4-axis Drone with 6kg Payload
    • YRRC 5.8G 2.5W 40CH VTX Drone FPV Analog Image Transmission
    • Hawkeye Firefly 8SE/8S 4K Screen WiFi FPV Action Camera
  • 4️⃣RASPBEERY PI
    • Raspberry Pi Pico W Wireless RP2040 MCU Board
    • Raspberry Pi 5
    • Raspberry Pi 4B
    • ELAB Raspberry Pi Card Reader
    • ELAB Raspberry Pi 5 Active Cooler
    • ELAB Raspberry Pi 4/5 Case (Acrylic case)
    • ELAB Raspberry Pi 4 Heat Sink (Copper)
    • Camera for Raspberry Pi
    • XIAO RP2350 Onboard RGB LED, Arm Cortex-M33 and Hazard3 RISC-V(Pre-Order)
    • Raspberry Pi Pico 2 RP2350
    • Seeed Studio Grove Starter Kit for LinkIt ONE
    • Seeed Studio ReSpeaker USB Mic Array
    • Raspberry Pi Zero 2W with Bluetooth 4.2 Onboard Antenna
    • Raspberry Pi Zero WH WiFi/Bluetooth 4.1 Bluetooth Low Energy
    • Seeed Studio XIAO RP2040 Supports Arduino
    • M.2 HAT for Raspberry Pi 5
    • EdgeBox Raspberry Pi IoT Edge Device 4GB RAM 32GB eMMC WiFi
    • Raspberry Pi Compute Module 4 with WiFi
    • Raspberry Pi 4 ReSpeaker Intelligent Speech Recognition 2 Microphone
    • Raspberry Pi 5 Vision Car AI Development Board Camera Recognition WIFI Kit
    • Waveshare RM500U-CNV Raspberry PI 5G/4G/3G Hat
    • Hailo-8 M.2 AI Accelerator Module Suitable for Raspberry Pi 5
    • Waveshare ESP8266 for Raspberry Pi Pico Wifi Module TCP UDP
    • Waveshare MAX-M8Q GNSS HAT for Raspberry Pi
    • Waveshare SX1262 LoRa HAT for Raspberry UART
    • Waveshare SX1268 LoRa HAT for Raspberry UART
    • Waveshare SIM7070G NB-IoT / Cat-M / GPRS / GNSS HAT for Raspberry Pi
    • Waveshare SIM7600G-H M.2 4G HAT for Raspberry Pi 4G/3G/2G GNSS
    • Waveshare SIM7600CE-CNSE 4G HAT for Raspberry Pi 4G 3G 2G GNSS
  • 5️⃣ARDUINO
    • ATmega328DIP Board Microcontroller Board
    • OpenELAB EASY PLUG RGB TCS34725 Color Sensor Module I2C
    • OpenELAB EASY PLUG Micro SD TFT card Read and Write Module
    • OpenELAB EASY PLUG CCS811 CO2 Air Quality Sensor
    • OpenELAB EASY PLUG SR01 Ultrasonic Sensor
    • OpenELAB EASY PLUG Education Robot Car Kit
    • OpenELAB EASY PLUG Sensor Learning Kit for Arduino
    • OpenELAB EASY PLUG Ultimate Starter Kit for Arduino
    • OpenELAB KEYBOT Programmable Education Robot Control Board
    • OpenELAB RJ11 EASY Plug Main Control Upgrade Board V2.0
    • OpenELAB Desktop Mini Bluetooth Smart Robot Car Kit V3.0
    • OpenELAB 4WD Mechanical Arm Robot Smart Car for Arduino
    • OpenELAB 4DOF Mechanical Arm Robot Car Learning Starter Kit
    • OpenELAB 4WD Mechanical Arm Robot Smart Car for Arduino
    • OpenELAB Desktop Mini Bluetooth Smart Robot Car Kit V3.0
    • OpenELAB RJ11 EASY Plug Main Control Upgrade Board V2.0
    • OpenELAB KEYBOT Programmable Education Robot Control Board
    • OpenELAB EASY PLUG Ultimate Starter Kit for Arduino
  • 6️⃣DISPLAYS
    • 1.3 inch OLED I2C 128 x 64 Pixel Display
    • 0.91 inch OLED I2C Display 128 x 32 pixels
    • WT32S3-86S touch display screen with temp and humidity sensor
    • LCD Display 1602 I2C
    • HW-140 DC-DC Buck Boost Converter Step Up/Down, LCD display
    • HD44780 2004 LCD Display Bundle 4x20 characters
    • ESP32-S3 Rotary Switch LCD 2.1 inch Round LCD Screen
    • 8*8 Matrix LED Display Module
    • 4 digit 7-segment LED Display
    • 3.5-inch 320x480 resistive touch display
    • 3.5-inch 320x480 capacitive touch display
    • 1.77 inch Spi TFT Display and 128x160 Pixels
    • 1.8 inch Spi TFT Display 128 x 160 pixels
    • 1 Digit 7-Segment LED Display 1 inch 25.4 mm
    • 0.96 inch OLED SSD1306 Display I2C 128 x 64 pixels
    • Waveshare 10.1 inch IPS Capacitive Touch Display
    • Waveshare 10.1 inch QLED Touch Display
    • Waveshare 9.7 inch IPS Capacitive Touch Display
    • Waveshare 10.1 inch IPS Capacitive Touch LCD
    • Waveshare 9.3 inch LCD Capacitive Touch Display High Brightness
    • Waveshare 9 inch QLED Quantum Dot Display
    • Waveshare 8 inch 2K IPS Capacitive Touch Display
    • Waveshare 8DP-CAPLCD 8 inch Capacitive Touch Display
    • Waveshare 7.9 inch IPS LCD Touch Screen, 400×1280 HDMI
    • Waveshare 8 inch DSI LCD Display Touch Screen I2C
    • Waveshare 7 inch IPS Integrated Display, With Touch Function
    • Waveshare 7HP-CAPQLED 7 inch QLED Quantum Dot Display
    • Waveshare 7 inch Capacitive Touch Screen HDMI
    • Waveshare 7 inch Capacitive Touch Screen with Case HDMI
    • 2.8inch USB Monitor,Water Cooler Screen/ PC Case Secondary Screen
    • Waveshare 5inch Desktop RGB Ambient Screen
    • Waveshare 5inch IPS Round Touch DisplayHDMI
    • Waveshare 5.5inch 2K Touch LCD Display HDMI
    • 2.1 inch USB Monitor, Water Cooler Screen/ PC Case Secondary Screen
    • Waveshare 8.8inch Desktop RGB Ambient Screen Type-C
    • Waveshare 8inch Desktop RGB Ambient Screen Type-C
    • Waveshare 7 inch Desktop RGB Ambient Screen
    • Waveshare 5inch HDMI Touch Screen LCD with Bicolor Case
    • Waveshare 65K RGB General 1.28inch Round LCD Display Module
    • 0.96 inch OLED Display Module, SPI / I2C Communication
    • 1.5 inch LCD Display Module, IPS Panel SPI 262K colors
    • Waveshare 1.8inch colorful display module for micro:bit
    • Waveshare 3.5inch RPi LCD (A)
    • Waveshare 5 inch LCD Touch Screen Display for Raspberry Pi
    • Waveshare 1.47inch LCD Display Module SPI
    • 7.3 inch 7 Color E-Paper
    • Waveshare 15.6 inch QLED Touch
    • Waveshare 7.5 inch NFC-Powered
  • 7️⃣CAMERAS
    • OV5640 Camera Board (A), 5 Megapixel (2592x1944)
    • OV2640 Camera Board (1622x1200)
    • Hawkeye Firefly 8SE/8S 4K Screen WiFi FPV Action Camera
    • ESP32-CAM Camera Module
    • DFRobot Gravity Huskylens AI Camera
    • IMX335 5MP USB Camera (B)
  • 8️⃣SENSORS
    • Rotation Sensor
    • WT32S3-86S touch display screen with temp and humidity sensor
    • Vibration Sensor
    • Ultrasonic Sensor
    • Thermistor Module
    • Soil Temperature and Humidity Module
    • Soil Moisture Sensor Hygrometer Module V1.2 capacitive
    • Shock Sensor Module
    • MQ-135 Gas Sensor
    • Motion Sensor Motion Detection Module HC-SR501 PIR
    • DHT11 Temperature-Humidity Sensor
    • DHT22 AM2302 Temperature sensor and humidity sensor
    • Current Sensor ACS712ELC-20A
    • VL53L0X Time-of-Flight (TOF) Laser distance sensor
    • GY-521 MPU-6050 3-axis gyroscope and acceleration sensor
    • DS18B20 digital temperature sensor
    • BME280 Humidity Pressure Temperature Sensors
  • 9️⃣IOT / COMMUNICATION
    • NodeMCU Lua Amica Module V2 ESP8266 ESP-12F WIFI
    • SIM7028 NB-IoT HAT
    • NRF24L01 with 2.4 GHz
    • Ai-Thinker AiPi-Eyes-S1 WifFi Camera
    • Ai-Thinker AiPi-Eyes-S2 WifFi Camera
  • 🔟MOTORS
    • CyberGear micromotor instruction manual
    • Servo Motor (SG90)
    • 5V DC Stepper Motor & ULN2003 Driver Board
    • 130 DC Motor
    • Xiaomi CyberGear Micromotor
  • 🇰🇳KITS
    • mBot Mega
  • ⚡POWER
    • HW-140 DC-DC Buck Boost Converter Step Up/Down, LCD display
    • MT3608 DC-DC power supply adapter step up module
    • LM2596S Step-down DC-DC Buck Converter
    • LM2596S DC-DC power supply adapter step down module
    • Hi-Link DC-DC 5V to xxV 1W Mini Converter Isolated Power Supply
    • Hi-Link AC-DC 5W Converter Power Supply
    • Hi-Link AC-DC 220V to xxV 3W Converter Power Supply
    • SunLit Austa Solar Module
  • 🔌ACCESSORIES
    • 4 digit 7-segment LED Display
    • 5V LED Traffic Signal Module
    • LED Ring 5V RGB WS2812B 12-Bit 50mm
    • 3D MKS Gen V1.4 Printer
    • USB 3.2 To 5GbE Adapter (WP-UT5) Realtek RTL8157
  • Heygears Reflex User Guide
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On this page
  • Waveshare MAX-M8Q GNSS HAT for Raspberry Pi
  • Product Link
  • Positioning Principle
  • Dimension
  • Test it in Windows PC
  • Using with Raspberry Pi
  • Using STM32 Board
  • Resources
  • FAQ

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Last updated 8 months ago

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Waveshare MAX-M8Q GNSS HAT for Raspberry Pi


Product Link

Positioning Principle

What's GNSS

GNSS (Global Navigation Satellite System) is a general term for multiple satellite systems. At present, there are BDS (China), GLONASS (Russia), GPS (United States), Galileo (Europe), QZSS (Japan) and IRNSS (India) navigation satellite systems in the world. The features of GNSS are as follows:

  • GPS is widely used with mature technology, and the frequency band signals such as L1C/A, L2C and L5, have improved the positioning accuracy.

  • GNSS modules with multi-system and multi-band can capture satellites from different satellite systems, which greatly increases the number of effective satellites and improves positioning accuracy and stability.

  • The signal received by the GNSS module contains reflected and refracted signals, resulting in multi-path effects that affect the positioning accuracy. The multi-band and multi-constellation system technology can effectively lessen errors caused by the atmosphere and improve positioning accuracy.

  • With the development of GNSS, a variety of positioning technologies such as RTK, PPP-RTK and multi-sensor fusion positioning DR (Dead Reckoning) have emerged to meet the needs of differentiated high-precision positioning.

GPS Principle

  • GPS satellites continuously send radio signals with their own time and position information in the air for GPS receivers (GNSS modules such as ZED-F9P)

  • A pseudo-random code will be generated inside the satellite and the receiver. Once the two pseudo-random codes are synchronized, the receiver can measure the difference between the time the radio signal is transmitted and the time it arrives at the receiver (referred to as the time delay), and multiply the time delay by the speed of light to get the distance (pseudorange).

  • The time of the GPS system is maintained by the rubidium atomic frequency standard of the atomic clocks on each satellite. These satellite clocks are generally accurate to within a few nanoseconds of Coordinated Universal Time (UTC), which is maintained by the Naval Observatory's "Master Clock", the stability of each master clock is several 10^(-13) seconds.

  • Computers and navigation information generators on GPS satellites know precisely their orbital positions and system time, while a global network of monitoring stations keeps track of satellites' orbital positions and system time. The main control station at Schriever Air Force Base in Colorado, together with its operation and control section, input the orbital position and onboard clock correction data calculated on the basis of complex models into each GPS satellite at least once a day.

  • To calculate the 3D position of the GPS receiver (GNSS module), the GPS receiver is required to receive signals from at least four satellites, and the 3D position is calculated according to the space triangle Pythagorean theorem and the quadratic linear equation.

What's RTK

RTK (Real Time Kinematic), also known as carrier phase differential technology, is a GNSS positioning technology that supports centimeter-level positioning accuracy (referred to as RTK) and is a differential method for real-time processing of the carrier phase observations of two measuring stations. The working process of RTK is shown in the figure below. The DGPS corrections generated by the base station (GNSS receiver) are transmitted to the mobile station (GNSS receiver) in real-time through the mobile network for calculation and centimeter positioning.

RTK Application

  • Apply in various control surveys such as traditional geodetic surveys and engineering control surveys in triangulation and wire netting methods, and use RTK to measure the positioning accuracy in real-time to ensure observation quality and improve operational efficiency. Compared with non-real-time measurements such as normal GPS static surveys, fast static surveys, and pseudo-dynamic surveys, it must be retested when the accuracy does not meet the requirements. In addition, RTK is used in highway control measurement, electronic circuit control measurement, water conservancy engineering control measurement, and geodetic survey, which can reduce labor intensity, save costs, and complete control point measurement within minutes or even seconds.

  • Topographic mapping: Using RTK only requires one person with the instrument to stay at the detail point for a second or two, and input the feature code at the same time. The accuracy of points and areas can be known in real-time through the handbook. After returning to the room, the professional software interface can output the required topographic map. In this way, RTK only requires one person to operate, and it does not require point-to-point vision, which greatly improves efficiency. With RTK and the electronic handbook, you can measure and design various topographic maps, such as general surveying, railway strip topographic maps, highway pipeline topographical maps, reservoir topographic maps, nautical ocean surveying, and so on with the depth sounder.

  • Setting out is an application branch of measurement. When using RTK to set out, you only need to input the designed point coordinates into the electronic handbook with the GPS receiver on your back, and it will remind you to go to the position. It is not only fast and easy but also is high-accuracy and uniform as GPS is set out by coordinates directly. Hence, the efficiency of setting out in exterior operation is greatly improved, and only one person to operate.

Dimension

Test it in Windows PC

Using with Raspberry Pi

Hardware Connection

PIN
Raspberry Pi(BCM)
Raspberry Pi(WiringPi)
Description

5V

-

-

5V Power input

GND

-

-

Ground

RXD

P14

P15

Receiver pin of UART

TXD

P15

P16

Transmit pin of UART

SDA

P2

P8

SDA pin of I2C

SCL

P3

P9

SCL pin of I2C

PPS

P18

P1

PPS pin of module

INT

P27

P2

Wakeup pin, low active

Enable Serial Port

Open the Raspberry Pi Terminal and configure by commands.

sudo raspi-config
#Choose Interfacing Options -> Serial -> No -> Yes
#You should disable shell login and enable the hardware serial
sudo reboot

Install and Modify Parameters

  • Install the Python library function:

sudo apt-get update
sudo apt-get install gpsd gpsd-clients gpsd-tools
sudo pip3 install gps3
  • Modify gpsd:

#Open gpsd file
sudo nano /etc/default/gpsd
#Change the below codes of file and save
USBAUTO="false"
DEVICES="/dev/ttyS0"
GPSD_OPTIONS="/dev/ttyUSB0"
  • Download demo codes:

mkdir ~/Documents/MAX-XXX_GNSS_HAT_Code
cd ~/Documents/MAX-XXX_GNSS_HAT_Code/
wget https://files.waveshare.com/upload/0/0f/MAX-XXX_GNSS_HAT_Code.zip
unzip MAX-XXX_GNSS_HAT_Code.zip

Python Example

Enter the python directory (demo codes), and run the example.

cd ~/Documents/MAX-XXX_GNSS_HAT_Code/RaspberryPi/python/coordinate_converter
sudo python3 main.py

NTP Server

The system clock of personal computers, servers, and other equipment will be skewed as shown in the figure below. High-precision clock scenarios will be affected in high-frequency trading systems, automated production lines, etc., while NEO-M8T can achieve coverage in harsh signal environments. It relies on the atomic clock on the satellite to ensure that the accuracy of the clock is not affected by factors such as the network. In this section, NEO-M8T and Raspberry Pi are used to build an NTP server to provide timing functions for devices in the local area network in an indoor closed environment.

1. Connect the NEO-M8T GNSS TIMING HAT to the antenna, and place the other end of the antenna near the outer wall or window sill. 2. Connect the NEO-M8T connected to the antenna to the Raspberry Pi, power it on, and wait for the NE0-M8T to output the PPS signal. 3. Copy and paste the following command to the Raspberry Pi command line to execute.

sudo apt-get install git
cd ~/Documents
sudo git clone 
cd RPi-GPS-PPS-StratumOne
sudo chmod 777 install-gps-pps.sh

4. The installation takes a long time, reboot the Raspberry Pi after installation. 5. Open the /boot/config.txt file, jump to the last line, change gpiopin=4 to gpiopin=18, press Ctrl+X then Y and press Enter to save.

sudo nano /boot/config.txt
dtoverlay=pps-gpio,gpiopin=18,capture_clear  # /dev/pps0

6. Use the following command to test the operation of pps0, the Raspberry Pi time has already used the time system provided by NEO-M8T

watch -n1 chronyc syntaxhighlightstats -v

7.To provide time for other devices, obtain the address of the Raspberry Pi running NTP, such as 192.168.6.93.

8. For Linux devices, use the following command to synchronize the time.

sudo apt install ntpdate
sudo ntpdate 192.168.6.93

Using STM32 Board

Hardware Connection

GNSS Module
XNUCLEO-F103RB
Description

5V

-

5V Power input

GND

GND

Ground

RXD

P9(TX)

Receive pin of UART

TXD

P10(RX)

Transmit pin of UART

Run the example

Download the demo codes. Open the STM32 project by Keil software, compile and download it to the XNUCLEO-F103RB board, connect UART2 pins to the PC, and check the information with COM assistance software.

Using with Jetson Nano

  • Install Python library function:

sudo apt-get update
sudo apt-get install python-serial
sudo apt-get install gpsd gpsd-clients python-gps
sudo pip3 install gps3
  • Modify gpsd parameters:

#Open gpsd document
sudo nano /etc/default/gpsd
#Modify the following parameters in the document and save the Settings to exit
USBAUTO="false"
DEVICES="/dev/ttyTHS1"
GPSD_OPTIONS="/dev/ttyUSB0"
  • Download the demo:

mkdir -p ~/Documents/MAX-XXX_GNSS_HAT_Code
cd ~/Documents/MAX-XXX_GNSS_HAT_Code/
wget https://files.waveshare.com/upload/0/0f/MAX-XXX_GNSS_HAT_Code.zip
unzip MAX-XXX_GNSS_HAT_Code.zip
  • Check the port for data:

sudo chmod 777 /dev/ttyTHS1
sudo minicom -D /dev/ttyTHS1 -b 9600
sudo cat /dev/ttyTHS1
sudo gpsd /dev/ttyTHS1 -F /var/run/gpsd.sock
sudo cgps -s
sudo killall gpsd
sudo reboot

python

Enter the python directory and run the demo, and you can view the information directly on Google Maps.

cd ~/Documents/MAX-XXX_GNSS_HAT_Code/RaspberryPi/python/coordinate_converter
sudo python3 main.py

Resources

Documents

Demo codes

Software

Datasheet

FAQ

In this section, the working principle of GPS receiver positioning is shown in the figure below, and the details are described in the following 5 points. For details of the positioning principle, please refer to , , and .

1. Download and install software and then enter it. 2. Set the jumpers in the A area, assemble the GNSS antenna, and set the receiver of the antenna on the open area outside. Connect it to the micro USB interface and the PC. 3. Note that you should set the side without sticker upward, Open Device Manager and view the COM port, connect MAX-M8Q, and use auto-baudrate. 4. Power the MAX-M8Q module and set it to 3D mode, select File -> Database Export -> Google Map Html to export file. 5. Download , unzip and open it by Chrome browser, and import the file which is saved from u-center above to check position information. 6. Please refer to the about how to use the u-center.

Enable NMEA 4.10 output to see BeiDou and Galileo

GPS Positioning Principle
GPS Operation Principle
Fundamentals of gps receivers
FUNDAMENTALS OF GPS
u-center
Test file
User guide
Schematic
Demo codes
u-center
CP2102 Driver
SSCOM
Official MAX-M8Q Datasheet
Why BeiDou and Galileo don't work?
LogoWaveshare MAX-M8Q GNSS HAT for Raspberry PiOpenELAB