LoRa Wireless Communication Module Design Guide LR-101H VER: 1.0 GlobalSat WorldCom Corporation 16F., No. 186, Jian 1st Rd, Zhonghe Dist., New Taipei City 23553, Taiwan Tel: 886.2.8226.3799/ Fax: 886.2.8226.3899 service@globalsat.com.tw www.globalsat.com.tw USGlobalSat Incorporated 14740 Yorba Court Chino, CA 91710 Tel: 888.323.8720 / Fax: 909.597.8532 sales@usglobalsat.com www.usglobalsat.
Product Description LR-101H is a low power-consuming, half-duplex module. It can wirelessly transmit data to long-distance. It is built-in high-speed and low power-consuming MCU and SX1276 modulation chipset. This chipset is applied with the forward error correction technique which greatly improves interference immunity and advances sensitivity. The coding can detect errors and automatically filter out errors and false data LR-101H provides multi-channels.
Hardware Specifications Chipset SEMTECH LoRa SX1276 Antenna RPSMA/50Ω Frequency 903-927 MHz Transmission 100mW (MAX.) power Transmission media UART UART Baud Rate: 1200/2400/4800/9600(Default)/19200/38400/57600bps Parity: 8N1/8E1/8O1 Operation Voltage 3.0V~6V Current consumption Receiving:13 mA(typical)， Transmitting:120 mA(typical) Sleeping:2.2uA(typical) Transmission 1kM(0.81Kbps) distance Receiving sensitivity -132dBm@0.
Pin Definition LR-101H Pin Definition Pin Signal name I/O Description 1 GND - Ground 2 VCC - 3.0V~6.
Operation Mode There are four operating modes of LR-101H. 1. Normal mode 2.Wake-up mode 3.Power-saving mode 4.Setup mode. The four operation modes are switched by the signal level of P1 and P2. Mode 1: Normal mode (P1=0, P2=0) UART is opened. Wireless channel is opened. Penetrating transmission. Mode 2: Wake-up mode (P1=0, P2=1) UART is opened. Wireless channel is opened.
Application Note 1. For proper operation of LR-101H, do not leave P1 or P2 floating. Do keep P1 and P2 at fixed level; otherwise it might cause the module instable. 2. Antenna is the important part in the communication system. The quality of antenna would directly influence the communication. Please take the antenna type and antenna’s electrical characteristics into consideration while integrating LR-101 into product.
Parameter Setting The configuration of LR-101H is programmed by hexadecimal notation. The default of baud rate is 9600bps.
The parameters are presented as hexadecimal. Parameter Name Bytes Description 4 Show the last 4 characters of model number in hexadecimal format. The last 4 characters of LR-101H are 101H. The hexadecimal of 101H is 0x31 0x30 0x31 0x4C. Model Name is written in FLASH memory and could not be modified. 7 Show the last 7 characters of firmware version in hexadecimal format. EX: The hexadecimal of 1507291. is 0X31 0x35 0x30 0x37 0x32 0x39 0x31.
For example, Module setting is as below: Group ID is 0. Air rate is 0.81K bps. RF frequency is 915.000MHz. RF power is 20dBm. UART Baud Rate is 9600bps. UART parity is none. Wakeup time is 1 sec.
Design Note The LR-101H LoRa modules are for being integrated into your devices for applying the LoRa technology, you can refer to the page3 of this doc. 1. GND under module should be kept into integrity. 2. Power Filter circuitry and matched resistance should be close to module. 3. The placement of the module should be kept away from the interfering source, such as WiFi Antenna, GSM Antenna, DDR CLK, and LCD line bundle, etc.
FCC warning: For Customers in the United States: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
