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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 ==
82	82
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.
107	107
	110	+
108	108	== 1.6 BLE connection ==
109	109
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) ====
294	294
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.
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754	754
755	755	[[image:image-20230512173903-6.png||height="596" width="715"]]
756	756
757		-
758	758	Connect to the SN50_v3 and run (% style="color:blue" %)**AT+MOD=2**(%%) to switch to ultrasonic mode (ULT).
759	759
760	760	The ultrasonic sensor uses the 8^^th^^ and 9^^th^^ byte for the measurement value.
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767	767
768	768	==== 2.3.3.9  Battery Output - BAT pin ====
769	769
770		-
771	771	The BAT pin of SN50v3 is connected to the Battery directly. If users want to use BAT pin to power an external sensor. User need to make sure the external sensor is of low power consumption. Because the BAT pin is always open. If the external sensor is of high power consumption. the battery of SN50v3-LB will run out very soon.
772	772
773	773
774	774	==== 2.3.3.10  +5V Output ====
775	775
776		-
777	777	SN50v3 will enable +5V output before all sampling and disable the +5v after all sampling.
778	778
779	779	The 5V output time can be controlled by AT Command.
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788	788
789	789	==== 2.3.3.11  BH1750 Illumination Sensor ====
790	790
791		-
792	792	MOD=1 support this sensor. The sensor value is in the 8^^th^^ and 9^^th^^ bytes.
793	793
794	794	[[image:image-20230512172447-4.png||height="416" width="712"]]