Here you will find the schematic designs for the Conexio Stratus IoT dev kit based on nRF91xx series and the associated shields and the expansion dock. A detailed description of the pin mapping can be found in each specific board directory.
Conexio Stratus Pro is a tiny-yet-powerful development kit for creating cellular-connected electronic projects and products. Powered by the cutting-edge nRF9161 cellular modem from Nordic Semiconductor, Stratus Pro offers unparalleled versatility, reliability, and ease of use, making it the go-to solution for IoT developers worldwide. It is a battery-operated platform, making it ideal for prototyping cellular IoT systems, such as asset tracking, environmental monitoring, smart metering, and even industrial automation.
With LTE-M, NB-IoT, and GPS connectivity packed into a compact form factor, Stratus Pro ensures your devices stay connected in any environment. It enables real-time data transmission and location tracking with minimal power consumption. Future-proof your IoT projects with DECT NR+ readiness, ensuring compatibility with emerging cellular standards for enhanced performance and longevity.
Thanks to the nPM1300 PMIC and fuel gauge, you can remotely monitor your Stratus Pro’s battery vitals and charging status. Stratus Pro also has built-in charging circuitry that makes it easier to connect to and recharge the Li-Po battery, creating fully energy-autonomous applications.
MCU: Nordic nRF9151 Microcontroller
- ARM Cortex-M33 with 1 MB Flash
- 256 kB RAM
- Pre-programmed MCUBoot bootloader
Modem
- Transceiver and baseband
- 3GPP LTE release 14 LTE-M/NB-IoT support
- DECT NR+ ready
- GPS/GNSS receiver
- RF Transceiver for global coverage supporting bands:
- B1, B2, B3, B4, B5, B8, B12, B13, B17, B18, B19, B20, B25, B26, B28, B65 (new), B66, and B85 (new)
- Supports 4FF Nano SIM, optional eSIM, or software SIM
Included cellular Data
- 500 MB of cellular data
- 250 SMS messages
- Valid for 10 years, can be reloaded or moved to a new plan
- Service available in 100+ countries (LTE + NB-IoT)
Power Management IC: Nordic nPM1300
- 800 mA battery charger
- Dual 200 mA buck DC/DC regulator
- Charging IC: Texas Instruments BQ25185
- Charge inputs: 3 V to 18 V
- Supports Li-ion, Li-Poly, and LiFePO4 battery chemistries
External Storage
- 16 KBit I2C EEPROM memory (24CW160T)
Power
- Operating range 1.8 to 5.5 V
- External LiPo battery connection (2 Pin JST type)
- Maximum output current: 800 mA
- Output voltages (via headers): 1.8 V, 3.3 V, 5 V (VUSB), VBAT
- SPDT slide switch for turning Stratus Pro on or off
- Quiescent current of entire board < 9 μA
Onboard sensors
- Battery fuel gauge enabled by nPM1300
- STMicroelectronics LIS2DH MEMS high-performance 3-axis accelerometer
I/O
- USB Type-C, for USB-to-Serial, DFU, and application firmware programming and debugging or battery charging
- 1 x U.FL for LTE-M/NB-IoT antenna
- 1 x U.FL for passive GPS antenna
- Total I/O pinouts: 36
- User I/O: Feather-compatible header, 28 programmable GPIO pins, 2 push buttons (1 reset, 1 programmable), 1 programmable LED
- QWIIC connector for external peripherals
- Supports J-Link and CMSIS-DAP-based programmers
- Onboard 10-pin 0.05 " (1.27 mm) mini SWD/JTAG pin connector
Size
- 66.04 mm x 25.40 mm
Start your product development with our Expansion Dock for Stratus Pro fast and easy. The Expansion Dock offers two QWIIC connectors, two Grove sockets, a mikroBUS™ socket, an nRF7002 Expansion board socket to add Wi-Fi location capabilities, and a SeeedStudio Xiao socket allowing you to create various wireless applications with one host board. It can't get any better than this., working with a Stratus shield requires no soldering and minimal wiring. Just plug the sensors, actuators, or displays into this shield via the standard cables, and focus on coding and application creation.
- 2 x Stratus Pro nRF9151/nRF9161 header sockets.
- 1 x nRF7002EB socket.
- 1 x SeeedStudio Xiao socket.
- 1 x mikro BUS: add-on board standard from Mikroe, allowing connection to over 800+ click boards.
- 2 x Sparkfun Qwiic connector: SparkFun's Qwiic Connect System, allowing to connect over 100+ Qwiic products.
- 2 x Grove I2C connector: Grove is a modular, standardized connector prototyping system by Seeedstudio.
- 1 x 2 Pin JST connector for plugging the solar panel input.
- 1 x 2 Pin JST connector for plugging the lipo battery.
- 1 x Power switch
Conexio Stratus devices and accessories can be purchased directly from our online store.
Please contact info@conexiotech.com if you would like to arrange help with your manufacturing and custom PCB design based on Stratus Pro platform.
This board is released under the CERN OHL-P (v2) license. See LICENSE for more info.