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LHT65 Temperature & Humidity sensor

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2.4.4

Built-in Humidity

Humidity:

0x0376/10=88.6%

2.4.5

Ext #

Bytes for External Sensor:

EXT # Value

External Sensor Type

0x01

Sensor E1, Temperature

Sensor(DS18B20)

2.4.6

Ext value

DS18B20 temp=0x0ADD/100=27.81

℃

The last 2 bytes of data are meaningless

DS18B20 temp=

(

0xF54F-65536)/100=-27.37

℃

The last 2 bytes of data are meaningless

If the external sensor is 0x01, and there is no DS18B20 connected. The temperature
will be set to 7FFF which is 327.67

℃

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Содержание LHT65

Страница 1: ...Sensor User Manual Document Version 1 1 Image Version v1 3 Version Description Date 0 9 Draft 2019 May 14 1 0 Release 2019 Jun 15 1 1 Modify activation process Add TTN Payload Decode 2019 Aug 28 1 2...

Страница 2: ...BAT Battery Info 11 2 4 3 Built in Temperature 11 2 4 4 Built in Humidity 12 2 4 5 Ext 12 2 4 6 Ext value 12 2 5 Downlink Payload 14 2 6 Show data on Cayenne 14 2 7 Read stored sensor data 17 2 8 Freq...

Страница 3: ...28 4 Sensors Accessories 30 4 1 E1 Temperature Sensor 30 5 FAQ 31 5 1 How to upgrade the firmware 31 5 2 How to change the LoRa Frequency Bands Region 34 5 3 How to choose the right frequency band se...

Страница 4: ...t provides ultra long range spread spectrum communication and high interference immunity whilst minimizing current consumption It targets professional wireless sensor network applications such as irri...

Страница 5: ...Tri color LED to indicate status 3200 set sensor record with time stamp 1 3 Specifications Built in Temperature Sensor Resolution 0 01 C Accuracy Tolerance Typ C Long Term Drift 0 02 C yr Operating R...

Страница 6: ...mperature Humidity sensor 6 40 1 5 Storage Operation Temperature 40 C to 85 C 1 6 Applications Smart Buildings Home Automation Logistics and Supply Chain Management Smart Metering Smart Agriculture Sm...

Страница 7: ...nce If LHT65 has not external sensor red led will blink once Pressing ACT for more than 3s Active Device green led will fast blink 5 times device will enter working mode and start to JOIN LoRaWAN netw...

Страница 8: ...rk We need to add the LHT65 device in TTN Step 1 Create a device in TTN with the OTAA keys from LHT65 Each LHT65 is shipped with a sticker with the default device EUI as below User can enter these key...

Страница 9: ...udes totally 11 bytes Uplink packets use FPORT 2 and every 10 minutes send one uplink by default After each uplink the BLUE LED will blink once Size bytes 2 2 2 1 4 Value BAT Built In Temperature Buil...

Страница 10: ...FFF var batV value 1000 Battery units V value bytes 2 8 bytes 3 if bytes 2 0x80 value 0xFFFF0000 var temp_SHT value 100 toFixed 2 SHT20 temperature units value bytes 4 8 bytes 5 var hum_SHT value 10 t...

Страница 11: ...it bit 2 14 Value BAT Status 00 b Ultra Low BAT 2 50v 01 b Low 2 50v BAT 2 55v 10 b OK 2 55v BAT 2 65v 11 b Good BAT 2 65v Actually BAT level Check the battery voltage for LHT65 Bat status 0xCBF6 14 0...

Страница 12: ...ue External Sensor Type 0x01 Sensor E1 Temperature Sensor DS18B20 2 4 6 Ext value DS18B20 temp 0x0ADD 100 27 81 The last 2 bytes of data are meaningless DS18B20 temp 0xF54F 65536 100 27 37 The last 2...

Страница 13: ...T CHE 2 AT DATE Set time Any A1 Total bytes 7 Example 0xA1190530162158 Set RTC time to 2019 5 30 16 21 58 AT EXT Any A2 Total bytes 2 Example 0xA201 Set external sensor type to E1 AT CLRDTA Clear Stor...

Страница 14: ...gino com LHT65 Temperature Humidity sensor 15 40 Step 2 To configure your Application to forward data to Cayenne you will need to add an Integration To add the Cayenne integration perform the followin...

Страница 15: ...www dragino com LHT65 Temperature Humidity sensor 16 40...

Страница 16: ...position reach the 400th sector it will go back and erase the 1st sector and store from this position Below are the AT Commands used to operate these data AT PDTA start stop Print the sector from star...

Страница 17: ...user want to use it with different frequency plan please refer the AT command sets 2 8 1 EU863 870 EU868 Uplink 868 1 SF7BW125 to SF12BW125 868 3 SF7BW125 to SF12BW125 and SF7BW250 868 5 SF7BW125 to S...

Страница 18: ...F12BW125 486 7 SF7BW125 to SF12BW125 486 9 SF7BW125 to SF12BW125 487 1 SF7BW125 to SF12BW125 487 3 SF7BW125 to SF12BW125 487 5 SF7BW125 to SF12BW125 487 7 SF7BW125 to SF12BW125 Downlink 506 7 SF7BW125...

Страница 19: ...efault Uplink channel 923 2 SF7BW125 to SF10BW125 923 4 SF7BW125 to SF10BW125 Additional Uplink Channel OTAA mode channel added by JoinAccept message AS920 AS923 for Japan Malaysia Singapore 922 2 SF7...

Страница 20: ...W125 923 3 SF7BW125 to SF12BW125 Downlink Uplink channels 1 7 RX1 921 9 SF12BW125 RX2 downlink only SF12BW125 might be changed to SF9BW125 2 8 7 IN865 867 IN865 Uplink 865 0625 SF7BW125 to SF12BW125 8...

Страница 21: ...TTL RXD Dupont green pin USB to TTL TXD Dupont white pin In PC User needs to set serial tool such as putty SecureCRT baud rate to 9600 to access to access serial console for LHT65 The AT commands are...

Страница 22: ...etail AT Command manual can be found at AT Command Manual AT CMD Help on CMD AT CMD Run CMD AT CMD value Set the value AT CMD Get the value ATZ Trig a reset of the MCU AT FDR Reset Parameters to Facto...

Страница 23: ...Tx and the Join Rx Window 2 in ms AT NJM Get or Set the Network Join Mode 0 ABP 1 OTAA AT NWKID Get or Set the Network ID AT FCU Get or Set the Frame Counter Uplink AT FCD Get or Set the Frame Counte...

Страница 24: ...erature Humidity sensor 25 40 AT CLRDTA Clear the storage record position back to 1st AT SLEEP Set sleep mode AT EXT Get or Set external sensor model AT RTP Get or Set record time period in min AT CFG...

Страница 25: ...equence 3 2 1 Multi channel ABP mode Use with SX1301 LG308 If device has not joined network yet 123456 AT FDR 123456 AT NJM 0 ATZ If device already joined network AT NJM 0 ATZ 3 2 2 Single channel ABP...

Страница 26: ...ble battery with low discharge rate targeting for 8 10 years use This type of battery is commonly used in IoT target for long term running such as water meter The discharge curve is not linear so can...

Страница 27: ...ansmit and receive time consumption The LoRa TX RX time and power can be found in the LoRa calculator tool In a typical LoRaWAN data transmit The energy profile is as below In LoRaWAN protocol the dev...

Страница 28: ...20dbm Transmit interval 15 minutes Payload 11 Bytes Scenario D High Power Case Poor signal quality in US915 band Radio Parameter SF10 125kHz 20dbm Transmit interval 15 minutes Payload 11 Bytes To sim...

Страница 29: ...0 4 Sensors Accessories 4 1 E1 Temperature Sensor With DS18B20 Temperature sensor with 1 meter cable long Resolution 0 0625 C 0 5 C accuracy from 10 C to 85 C 2 C accuracy from 55 C to 125 C Operating...

Страница 30: ...hange LoRaWAN bands Video Instruction is here https youtu be 0xpSWTCuDGQ The latest firmware and changelog can be found at below link http www dragino com downloads index php dir LHT65 Firmware Below...

Страница 31: ...sensor 32 40 Step1 Install ST LINK driver first and then install ST LINK Utility Step2 Download the LHT65 Image files http www dragino com downloads index php dir LHT65 Firmware Step3 click the blue...

Страница 32: ...www dragino com LHT65 Temperature Humidity sensor 33 40 Step4 The led on the ST LINK adapter will now blinking click program verify button to select the image to be upgraded...

Страница 33: ...in LoRaWAN 1 0 3 Regional Parameters xlsx The LHT65 choose CHE 2 by default US915 AU915 If user has issue to join the LoRaWAN network please check if the frequency band matches the LoRaWAN network se...

Страница 34: ...nnel 0 7 2 916 8 917 917 2 917 4 917 6 917 8 918 918 2 Channel 8 15 3 918 4 918 6 918 8 919 919 2 919 4 919 6 919 8 Channel 16 23 4 920 920 2 920 4 920 6 920 8 921 921 2 921 4 Channel 24 31 5 921 6 92...

Страница 35: ...session key APPSKEY from the device Note user just need to make sure above three keys match User can change either in TTN or Device to make then match In TTN NETSKEY and APPSKEY can be configured by u...

Страница 36: ...LoRaWAN US915 band IN865 LoRaWAN IN865 band CN470 LoRaWAN CN470 band YY 00 no external sensor E1 with model E1 temperature sensor Default version External sensor can be ordered separately by using th...

Страница 37: ...o Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio fre...

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