S100 Slave - GPS L86


The S100 Slave - GPS L86 Module is a certified Rhomb.io Module that allows Global Navigation Satellite System (GNSS) possitionining and movement sensing. GNSS is a term that describes all global positioning systems like the United States GPS, Russian GLONASS and the Japanese QZSS. All these technologies are compatibles with this Module. The movement sensor is a powerful 9-axis IMU that integrates a gyroscope, an accelerometer, and a compass.

The next figure shows a 3D view for the S100 Slave - GPS L86 Module.

S100 Slave - GPS L86 v1.0 TOP.png

           S100 Slave - GPS L86 v1.0 BOTTOM.png


  • Navigation devices
  • Tracking
  • Wearable sensors for health, fitness and sports

Module Specification

The S100 Slave - GPS L86 Module mounts the Quectel's L86-M33 with a patch antenna along with an external antenna connector. The automatic antenna switching function enables switching between the internal patch antenna and the external active antenna, keeping positioning during the switching process. The Module supports various location, navigation and industrial applications including autonomous GPS, GLONASS, SBAS (including WAAS, EGNOS, MSAS, and GAGAN), QZSS, and AGPS. A embedded flash memory provides capacity for users to store some useful navigation data and allows for future updates.

The S100 Slave - GPS L86 Module also mounts the MPU-9250, a 9-axis Motion Tracking which includes a 3-axis accelerometer, 3-axis gyroscope and a 3-axis magnetometer. From the I2C point of view, the IC works as two devices. One device is the magnetometer and has the 0x0C address. The other device is the accelerometer and the gyroscope, and its I2C address is 0x68. The device allows selecting different resolutions by writing on the configuration registers.

The following figure identifies the main components onboard:

S100 Slave - GPS L86 v1.0 Description TOP.png

The next figure shows the block diagram for the S100 Slave - GPS L86 Module:

S100 Slave - GPS L86 v1.0 Block Diagram.png

As a summary, the following table indicates the main features:

GNSS & 9-Axis (L86 + MPU-9250) Key Features
Quectel L86 GNSS module with an embedded patch antenna and LNA
Invensense MPU-9250 9-axis accelerometer, gyroscope and magnetometer
MTK positioning engine
High level of sensitivity, accuracy and TTFF with los power comsumption
Embedded path and external active antenna
UART and I2C interfaces
Op. Voltage: 1.8 V to 3.3 V
Op. Temperature: -40 ºC to +85 ºC

User Interfaces

The following table indicates the available serial interfaces of the Rhomb.io standard used in this Module. This table relates the interfaces of the Rhomb.io standard with the net names of the schematic and with the components to which they are connected.

Rhomb.io Interface Schematic Signal Component Component Pin
I2C I2C_SCL Accelerometer (U2) SCL-SCLK

GPIOs and Control Signals

The following table summarizes the GPIOs and Control Signals used on the S100 Slave - GPS L86 Module. This table relates the signals of the Rhomb.io standard with the net names of the schematic and with the components to which they are connected.

Rhomb.io Signal Schematic Signal Component Component Pin
1WIRE 1WIRE ID Memory (U4) IO
INT INT Accelerometer (U2) INT
IO IO0 Accelerometer (U2) FSYNC
IO1 GNSS L86 (U1) 1PPS
  • 1WIRE: This signal can be used to read the ID Memory.
  • IO0: This signal can be used to fix the time from which the device will start to take samples at the fixed sample rate.
  • I01: This signal can be used to turn on the LED of the Module if you close the solder jumper.


The S100 Slave - GPS L86 can use the 3.3 V rail and VIO_IN rail (voltage reference with which the Core/Master operates). Make sure these rails is enabled on the motherboard you are going to plug this Module.

The V_BCKP (Backup Power Supply) of the GNSS L86 is the supply power for RTC domain and it is connected to both the 3V3 rail and the VRTC signal of the Rhomb.io connector.

You can find more information about power consumption in the L86-M33 and MPU-9250 datasheets.


Click the image below to download the schematic files.

Bill of materials

Click the image below to download the BOM files.

Mechanical Specifications

S100 Slave - GPS L86 v1.0 Dimensions.png


  • Precaution against Electrostatic Discharge. When handling Rhomb.io products, ensure that the environment is protected against static electricity. Follow the next recommendations:
  1. The users should wear anti-static clothing and use earth band when manipulating the device.
  2. All objects that come in direct contact with devices should be made of materials that do not produce static electricity that would cause damage.
  3. Equipment and work table must be earthed.
  4. Ionizer is recommended to remove electron charge.
  • Contamination. Be sure to use semiconductor products in the environment that may not be exposed to dust or dirt adhesion.
  • Temperature/Humidity. Semiconductor devices are sensitive to environment temperature and humidity. High temperature or humidity may deteriorate semiconductor devices characteristics. Therefore avoid storage or usage in such conditions.
  • Mechanical Shock. Care should be exercised not to apply excessive mechanical shock or force on the connectors and semiconductors devices.
  • Chemical. Do not expose semiconductor device to chemical because reaction to chemical may cause deterioration of device characteristics.
  • Light Protection. In case of non-EMC (Epoxy Molding Compound) package, do not expose semiconductor IC to strong light. It may cause devices malfunction. Some special products which utilize the light or have security function are excepted from this specification.
  • Radioactive, Cosmic and X-ray. Semiconductor devices can be influenced by radioactive, cosmic ray or X-ray. Radioactive, cosmic and X-ray may cause soft error during device operation. Therefore semiconductor devices must be shielded under environment that may be exposed to radioactive, cosmic ray or X-ray.
  • EMS (Electromagnetic Susceptibility). Note that semiconductor devices characteristics may be affected by strong electromagnetic waves or magnetic field during operation.


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