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LHT65 Temperature & Humidity sensor 14 / 40
2.5 Downlink Payload
After each success downlink, the PURPLE LED will blink once.
Downlink Command
FPort
Header
Downlink payload format
TDC (Transmit Time
Interval)
Any
01
Total bytes: 4. Unit: Second
Example:
0x01000258: Set AT+TDC=0x258=600S
Recommend: higher than 0x12C (5 minuntes)
RESET
Any
04
Total bytes: 2
Example: 0x04FF, reset device
AT+CFM
(Set Confirm status)
Any
05
Total bytes: 2
Example: 0x0501: AT+CFM=1, 0x0500: AT+CFM=0
AT+CHE
Any
07
Total bytes: 2
Example: 0x0702: AT+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 Storage)
Any
A3
Total bytes: 2
Example: 0xA301: Clear data storage
AT+RTP
(Set Record Time
Period)
Any
A4
Total bytes: 3 unit: minutes
Example:
0xA4000A: Set record time period to 10 minutes
Example Downlink payload setting in TTN:
2.6 Show data on Cayenne
Cayenne provides a human friendly interface to show the sensor data, once we have data in TTN,
we can use Cayenne to connect to TTN and see the data in Cayenne. Below are the steps:
Step 1: Be sure that your device is programmed and properly connected to the network at this
time.