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41	41	* Downlink to change configure
42	42	* 8500mAh Battery for long term use
43	43
	44	+
44	44	== 1.3 Specification ==
45	45
46	46
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78	78	* Sleep Mode: 5uA @ 3.3v
79	79	* LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
80	80
	82	+
81	81	== 1.4 Sleep mode and working mode ==
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83	83
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105	105	)))
106	106	|(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means device is in Deep Sleep Mode.
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	110	+
108	108	== 1.6 BLE connection ==
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110	110
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290	290	1. All modes share the same Payload Explanation from HERE.
291	291	1. By default, the device will send an uplink message every 20 minutes.
292	292
	296	+
293	293	==== 2.3.2.1  MOD~=1 (Default Mode) ====
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295	295
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700	700
701	701	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/1656379339508-835.png?rev=1.1||alt="1656379339508-835.png"]]
702	702
703		-
704	704	In MOD=1, user can use byte 6 to see the status for door open or close. TTN V3 decoder is as below:
705	705
706	706	door= (bytes[6] & 0x80)? "CLOSE":"OPEN";
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708	708
709	709	==== 2.3.3.6 I2C Interface (SHT20 & SHT31) ====
710	710
711		-
712	712	The SDA and SCK are I2C interface lines. You can use these to connect to an I2C device and get the sensor data.
713	713
714	714	We have made an example to show how to use the I2C interface to connect to the SHT20/ SHT31 Temperature and Humidity Sensor.
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737	737
738	738	==== 2.3.3.7  ​Distance Reading ====
739	739
740		-
741	741	Refer [[Ultrasonic Sensor section>>||anchor="H2.3.3.8UltrasonicSensor"]].
742	742
743	743
744	744	==== 2.3.3.8 Ultrasonic Sensor ====
745	745
746		-
747	747	This Fundamental Principles of this sensor can be found at this link: [[https:~~/~~/wiki.dfrobot.com/Weather_-_proof_Ultrasonic_Sensor_with_Separate_Probe_SKU~~_~~__SEN0208>>url:https://wiki.dfrobot.com/Weather_-_proof_Ultrasonic_Sensor_with_Separate_Probe_SKU___SEN0208]]
748	748
749	749	The SN50_v3 detects the pulse width of the sensor and converts it to mm output. The accuracy will be within 1 centimeter. The usable range (the distance between the ultrasonic probe and the measured object) is between 24cm and 600cm.