Notecarriers are available in several form-factors to facilitate rapid prototyping. Depending upon the variant, a Notecarrier may be designed with direct host integration, size optimization, integrated cellular/Wi-Fi and GNSS antennas, or even to be soldered directly into a solution for low-volume production.
Notecarriers are designed to bridge the gap between prototype and production for the Notecard. The Notecard is designed to be socketed directly onto the circuit board using an edge connector socket, along with a customer's MCU, sensors, and controls. While such a model provides a highly modular configuration for the final product, it can make prototyping unnecessarily difficult.
Notecarriers offer breakout connections for the Notecard, as well as circuitry to provide power management, protection and signal amplification.
- Simple. Provides breadboard compatible pins or solderable mask for direct connections.
- Compatible. Level shifters ensure compatibility with 3.3V or 5V equipment.
- Convenient. Powered by a micro-USB connector (requires 2A supply).
- GPS Ready. Models are either active GPS compatible, or feature a built-in antenna to enable GNSS connectivity.
Due to differences in the physical size of Notecards, certain Notecarriers are only compatible with certain Notecards. The Notecarrier Pi v2.0 is compatible with:
Notecarrier Pi (CARR-PI) is designed for drop-in development with a Raspberry Pi or compatible Single Board Computer. This Notecard must be powered by a Raspberry Pi or compatible SBC.
- Pre-soldered stackable 40-pin header for plugging directly into a Raspberry Pi and stacking additional Pi hats.
- Notecard edge connector socket and mounting screw receptacle.
- Micro-USB port to power Notecarrier and provide a USB Serial command interface to Notecard.
- External Nano-SIM slot for additional carrier connectivity.
- DIP switches (shown below) to configure diagnostic serial port, attention pin, and active GPS support.
- Requires user provided U.FL cellular/Wi-Fi antenna and optional U.FL active GPS antenna.
- PCB Dimensions: 56mm x 65mm
- Center of Mounting Holes: 49.5mm x 58.5mm
- 2 Qwiic ports for attaching external peripherals to your project.
Due to the power requirements of the Notecard, some Raspberry Pi 2 and 3 models include a current-limiting fuse that will power-cycle the device when the Notecard's modem is on and transmitting. To avoid these issues, we recommend using only Raspberry Pi 4 or 5 devices with the Notecard and Notecarrier Pi.
The Micro-USB port on the Notecarrier Pi is a data-only port and does not provide power to the Notecarrier. Make sure to power your project with a Raspberry Pi, or use an alternate power method, including:
attaching a LiPo battery.
The LiPo battery must be a single-cell 3.7V battery with a 2-pin JST PH connector.
applying 2.5-5.5VDC to the
Commonly provided via DC power supply or non-rechargeable battery.
Typical USB ports may only be capable of supplying 500 mA of current, which might not be enough to power Notecard during a cellular connection to a GSM network (which can spike to 2A). In this situation, you're advised to supplement power to your Notecarrier with an external source (e.g. a LiPo battery).
All Notecarrier models are designed to support active GPS, and several Notecarrier models provide built-in antennas ready to be connected to a Cellular Notecard using the included U.FL cables.
The Notecarrier B and Notecarrier Pi models do not have integrated GPS antennas, but support active GPS by providing circuitry to enable bias voltage to be supplied.
The Notecarrier is built to support either an active or passive GPS antenna, and
has a DIP switch to enable you to select your configuration. The DIP switch
connects the Notecard's
VACT_GPS_IN to support active GPS
antennas that accept voltages in the 3.3V-4V range*.
VACT_GPS_OUT is only powered when the cellular modem is active.
Notecarrier Pi is configured as a Pi Hat. As such, the Notecarrier Pi follows the standard 40-pin Raspberry Pi Model B+ layout.
|Pin #||Pin Name||Dedicated||Description|
|8||AUX_RX||Y/N (DIP)||High-speed diagnostic interface|
|10||AUX_TX||Y/N (DIP)||High-speed diagnostic interface|
|31||ATTN||Y/N (DIP)||Configurable interrupt signal|
There are three DIP switches are located on the board. The switches are used to reserve exclusive access to the GPIO pins.
ACTIVE GPS- When turned
ON, applies 3.9VDC to the center conductor of the Notecard GPS antenna connector to power the low-noise amplifier (LNA) of an active GPS antenna. This switch must be
OFFif Notecard is used with a passive GPS antenna! However, we recommend an active antenna for best performance.
SERIAL TXRX- When turned
ON, enables serial communication with Notecard via Notecard
AUX_TXvia Raspberry Pi GPIOs 14 and 15 (Pins 8 and 10). Typical applications will use I2C for Notecard interactions, with this AUX serial port providing useful debugging features for developers.
ATTN- When turned
ON, connects Notecard ATTN to Raspberry Pi GPIO 6 (Pin 31).
Actual values may vary based on local conditions such as atmospheric conditions and distance to the cell tower.
Open source hardware designs for all Notecarriers are maintained in the note-hardware GitHub repository.
|Ray Ozzie||2019-2020||Document drafted|
|John Wiedey||2020||Various improvements|
|Sean Taylor||2020||Various improvements|
|Zachary J. Fields||01 OCT 2020||Updated information and translated to markdown|
|Brandon Satrom||04 JAN 2021||Added link to design resources|
|Greg Wolff||13 JAN 2021||Added BAT pin information to Notecarrier AF datasheet|
|Brandon Satrom||07 APR 2022||Added Notecarrier A information|
|Zachary J. Fields||20 JUL 2022||Added Notecarrier F information|
|Zachary J. Fields||24 OCT 2022||Added Notecarrier B v2 information|
|Rob Lauer||28 OCT 2022||Added versioning for Notecarrier B v1/v2|
|TJ VanToll||05 JAN 2023||Added Notecard Outboard Firmware Update information|
|Rob Lauer||28 FEB 2023||Re-labeling Notecarrier B as "Basic"|
|Rob Lauer||01 MAR 2023||Added PCB/Mounting Hole Dimensions|
|Rob Lauer||07 SEP 2023||Added Notecarrier F v1.3 information|
|Rob Lauer||16 NOV 2023||Added Notecarrier Pi v2.0 information|