LRNHEL Instruction Manual
Atlas Labs Pty Ltd. | www.atlaslabs.com.au Table of Contents 1.0 Overview 1 2.0 Typical PCB Layout 2 3.0 Interfacing with the LRNHEL module 2 4.0 General Specifications 4 5.0 Regulatory information 5 5.1 Labeling and user information requirements 5 5.2 RF Exposure 6 5.3 Approved external antenna types 7 5.
Atlas Labs Pty Ltd. | www.atlaslabs.com.au 1.0 Overview The LRNHEL Long Range Transceiver module is based on the Microchip RN2903 module and establishes an encrypted long range communication link between a base station and the processor this module is connected to. It is electrically identical to the Microchip RN2903 module and the same UART commands can be used to interact with it. For more in-depth technical information the reader is recommended to consult the RN2903 datasheet and command list.
Atlas Labs Pty Ltd. | www.atlaslabs.com.au 3.0 Interfacing with the LRNHEL module The dedicated UART TX and RX pins (pins 6 and 7 respectively) can be used to interface with the module. The default settings are: Baud rate - 57600 bps Packet length - 8 bit Parity bit - No Stop bits - 1 bit Hardware flow control - No The module can be wired up as shown in figure 3 below.
Atlas Labs Pty Ltd. | www.atlaslabs.com.au 4.0 General Specifications Parameter Min. Typ. Max. Units Supply Voltage 2.1 - 3.6 V Voltage on VDD with respect to VSS -0.3 - 3.9 V 200/185 mA Total GPIO sink/source current Logic Input Voltage Low - - 0.15 x VDD V Logic Input Voltage High 0.8 x VDD _ _ V Reset 1.75 1.9 2.05 V RF Input Level - - +10 dBm Idle mode current consumption at 3V - 2.7 - RX mode current consumption at 3V - 13.
Atlas Labs Pty Ltd. | www.atlaslabs.com.au 5.0 Regulatory information The 2AURCLRNHEL module has received Federal Communications Commission (FCC) CFR47 Telecommunications, Part 15 Subpart C “Intentional Radiators” modular approval in accordance with Part 15.212 Modular Transmitter approval.
Atlas Labs Pty Ltd. | www.atlaslabs.com.au Additional information on labeling and user information requirements for Part 15 devices can be found in KDB Publication 784748 available at the FCC Office of Engineering and Technology (OET) Laboratory Division Knowledge Database (KDB) https://apps.fcc.gov/oetcf/kdb/index.cfm 5.2 RF Exposure All transmitters regulated by FCC must comply with RF exposure requirements.
Atlas Labs Pty Ltd. | www.atlaslabs.com.au 5.3 Approved external antenna types To maintain modular approval in the United States, only the antenna types that have been tested shall be used. It is permissible to use different antenna manufacturer provided the same antenna type and antenna gain (equal to or less than) is used. Testing of the 2AURCLRNHEL module was performed with the antenna types listed in Table 5-1 Tested External Antenna Types. 5.
