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 LTE 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 GPRS connectivity.
Notecarrier-AA (CARR-AA) is designed for building battery-powered wireless applications.
- Pre-soldered female Notecarrier-AA 22-pin header for easy access to Notecard edge connector pins.
- Notecard edge connector socket and mounting screw receptacle.
- Micro-USB port to power Notecarrier and provide a USB Serial command interface to Notecard.
- Onboard cellular and active GPS antennas.
- External Nano-SIM slot for additional carrier connectivity.
- Pre-soldered case for 3 AA batteries (not included).
All Notecarriers can be powered by connecting directly to the Micro-USB port. However, most installations will not have USB power available, so several alternate power options are provided by the various Notecarrier models:
attaching a LiPo battery.
The LiPo battery must be a single-cell 3.7V battery with a 2-pin JST PH connector.
attaching a solar cell (must be accompanied by LiPo).
The solar charging circuit is designed for use with a 4.5-7V solar panel.
- applying 2.5-5.5VDC to the
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.
All Notecarrier models are designed to support active GPS, and several Notecarrier models provide built-in antennas ready to be connected to Notecard using the included U.FL cables.
The Notecarrier-A models feature built-in, active GPS antennas and are designed with a sufficient buffer to isolate the antenna and minimize interference with the other electronics. Notecarrier-A models do NOT support external GPS antennas.
|<VUSB||IN/OUT||Access to VUSB pin of the USB jack|
|<BAT||IN/OUT||Access to battery voltage|
|<MAIN||OUT||Access to Notecard supply voltage|
|<VIO||OUT||Reference voltage for digital I/O|
|V+||IN||2.5-5.5V, <8uA idle, <500mA typical, 2A surge max (GPRS)|
|EN||IN||>1.1v will power on the module, used for main product ON/OFF and for when product is being shipped to ensure that there is no communications attempted. If USB is active as power source, this pin is ignored, else it is required to be tied high or low.|
|RST||IN||>0.8v pulse will cause hard-reset of the module. This pin is internally pulled low, so NC is acceptable.|
|SCL||IN/OUT||I2C clock request interface|
|SDA||IN/OUT||I2C data request interface*|
|ATTN||OUT||Configurable interrupt signal|
|AUXEN||IN/OUT||API-selectable alternate modes of operation|
|AUXRX||IN/OUT||API-selectable alternate modes of operation|
|AUXTX||IN/OUT||API-selectable alternate modes of operation|
|AUX1||IN/OUT||API-selectable alternate modes of operation|
|AUX2||IN/OUT||API-selectable alternate modes of operation|
|AUX3||IN/OUT||API-selectable alternate modes of operation|
|AUX4||IN/OUT||API-selectable alternate modes of operation|
|RX||IN||UART serial receive request interface|
|TX||OUT||UART serial transmit request interface|
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|