Technical Support: h.usriot.com USR-LG206-P User Manual File Version: V1.0.6.01 Jinan USR IOT Technology Limited

Technical Support: h.usriot.com Jinan USR IOT Technology Limited

Technical Support: h.usriot.com Adopt LoRa point-to-point protocol. Support fixed-point transmitting mode. Data encryption transmission. Support RS232/RS485 interface. Maximum communication distance: 2300m. (Test in an empty area, under the 20 dBm transmitting power and 3.5dBi antenna gain) Receiving sensitivity: -138.5dBm. Support AT command mode and setup software based on AT command mode. Support hardware watchdog. 5~36V power supply. Support ESD protection. Support power supply anti surge. Support RS485 anti surge. Jinan USR IOT Technology Limit

Technical Support: h.usriot.com 1. Get Start If user has any question, please submit it back to customer center: http://h.usriot.com. 1.1. Product introduction USR-LG206-P is half duplex Serial to LoRa covnerter which supports point-to-point protoco. LG206 transmits/receives data by serial and it can realize one-to-one or one-to-many communication. Model 1.2. Basic parameters Parameter Frequency band Transmitting power Receiving sensitivity Transmission distance Wireless parameters 10dBm~20dBm 3500 meters. Test condition: Open area, clear weather, 20dBm transmitting power, 5dBi antenna gain,...

Technical Support: h.usriot.com User can refer to following application diagram to test the LG206. Figure 2 Application diagram 2. Product function USR-LG206-P functional diagram as follow: Serial port packaging Data transparent transmission Transparent transmission mode Serial port device Serial port Serial port packaging Parse data Update channel and destination address LoRa node Fixed-point transmitting mode Parameter Query/Set Figure 3 Functional diagram 2.1. Work mode USR-LG206-P supports three work modes: ➢ AT command mode ➢ Transparent transmission mode ➢ Fixed-point transmitting mode...

Technical Support: h.usriot.com In transparent transmission mode, data transmission process won’t influence data content. Two LoRa device can realize data transmission without any data transport protocol.To realize transparent transmission, both sides of communication must satisfy three conditions: ➢ Same rate level ➢ Same channel ➢ Same destination address or use broadcast address Figure 4 Transparent transmission mode Note: ➢ To ensure data security, data encryption is enabled during data transmission. ➢ If user configures LG206-P’s destination address to broadcast address, all other LG206-P...

Technical Support: h.usriot.com Related AT command: Command Query/Set work mode Query/Set rate level Figure 7 Fixed-point transmitting mode AT command 2.2. Power consumption mode LG206-P supports two power consumption modes: ➢ RUN: Run mode. After powering, LG206-P will enter continuous receiving status. LG206-P will switch to transmitting status when there is data being transmitted and reset to receiving status after transmitting data. ➢ WU: Wake up mode. In this mode, a certain time length waking up code will be added into data before transmitting data. So the transmission efficiency of WU...

Technical Support: h.usriot.com Figure 10 Data security 2.5. RSSI indication This function can query RSSI of both sides of communication to provide a reference for assessing communication quality. The usage as follow: 1. Configure rate, channel and destination address of serial server LG206-P A,B to ensure communication. 2. Make A enter AT command mode and send AT+SQT to enter listening status. 3. User can make B transmit data manually by serial or make B enter AT command mode and send AT+SQT=Time to transmit data automatically.(For example, user can send AT+SQT=500 to make B transmit data every...

Technical Support: h.usriot.com 3. AT command User can refer to https://www.usriot.com/support/faq/enter-serial-command-mode.html to enter AT command mode. 3.1. AT command return code Return code Successful response Invalid command format Invalid command Invalid operator Invalid parameter Function Basic command Exit AT command mode. Query/Set AT command echo function enable/disable. Save current settings as default settings. Reset to default settings. Query firmware version Query/Set work mode. Query/Set serial port parameters. Query/Set power consumption mode. Query/Set wake up interval. LoRa...

Technical Support: h.usriot.com 3.3. AT command details 3.3.1. AT+ENTM Format Set Default Value Status of AT command Echo function Format Query 4 bytes HEX format character string Format 3.3.7. AT+VER Parameter Jinan USR IOT Technology Limited

Technical Support: h.usriot.com Firmware version Format Default Value Work mode Range TRANS: Transparent transmission mode FP: Fixed-point transmitting mode Format Query Default Value Baud rate Data bits Stop bits Flow Control NFC: No flow control 485: Enable RS485 Format Query Default Value Power consumption mode Range RUN: Run mode WU: Wake up mode Format Query Jinan USR IOT Technology Limited

Technical Support: h.usriot.com Default Value Format Query Note: This parameters is invalid in RUN mode. In WU mode, the waking up code that corresponds to waking up interval will be added into data before transmitting data. Default Value LoRa air rate level Format Query Default Value Destination address Format Query Note: 65535 is broadcast address and all LG206-P with same channel and same rate can receive the data. Jinan USR IOT Technology Limited

Technical Support: h.usriot.com -L: 0~127( Default is 72, frequency band 470Mhz) -H: 0~127( Default is 65, frequency band 868Mhz) Format Note: -L: Working frequency band=(398+ch)MHz; -H: Working frequency band=(803+ch)MHz Default Value Status of forward error correction function Format Query Note: Enable this function can make data transmission more stable but lower communication rate. Default Value Transmitting power Format Query Jinan USR IOT Technology Limited

Technical Support: h.usriot.com Data transmission interval Format Query AT+SQT Display RSSI Transmit test data automatically 16 bytes HEX format character string Format Note: To ensure data security, this data encryption word can only be set but not be queried. Jinan USR IOT Technology Limited