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8	8	**RS485-BL – Waterproof RS485 to LoRaWAN Converter User Manual**
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11		-**Table of Contents:**
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17		-= 1.Introduction =
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19		-== 1.1 What is RS485-BL RS485 to LoRaWAN Converter ==
	17	+1. Introduction
	18	+11. What is RS485-BL RS485 to LoRaWAN Converter
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26	26	The Dragino RS485-BL is a **RS485 / UART to LoRaWAN Converter** for Internet of Things solutions. User can connect RS485 or UART sensor to RS485-BL converter, and configure RS485-BL to periodically read sensor data and upload via LoRaWAN network to IoT server.
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30	30	RS485-BL can interface to RS485 sensor, 3.3v/5v UART sensor or interrupt sensor. RS485-BL provides **a 3.3v output** and** a 5v output** to power external sensors. Both output voltages are controllable to minimize the total system power consumption.
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34	34	RS485-BL is IP67 **waterproof** and powered by **8500mAh Li-SOCI2 battery**, it is designed for long term use for several years.
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38	38	RS485-BL runs standard **LoRaWAN 1.0.3 in Class A**. It can reach long transfer range and easy to integrate with LoRaWAN compatible gateway and IoT server.
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42	42	For data uplink, RS485-BL sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-BL will process these returns data according to user-define rules to get the final payload and upload to LoRaWAN server.
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46	46	For data downlink, RS485-BL runs in LoRaWAN Class A. When there is downlink commands from LoRaWAN server, RS485-BL will forward the commands from LoRaWAN server to RS485 devices.
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50	50	Each RS485-BL pre-load with a set of unique keys for LoRaWAN registration, register these keys to LoRaWAN server and it will auto connect after power on.
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55		-== 1.2 Specifications ==
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	45	+11. Specifications
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57	57	**Hardware System:**
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59	59	* STM32L072CZT6 MCU