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LHT65 Temperature & Humidity sensor
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3.3.2
Power consumption Analyze
Below is the transmit power consumption of the system:
1.
Deep Sleep (Stop mode):
a)
LHT65 without sensor. ~ 3uA
b)
With E1 sensor: ~ 4uA
2.
Sampling current while reading E1.
Built-in sensor sampling time: 120ms. 2mA
E1 sensor sampling time: 750ms, current: 1.5mA
Above power should add 8mA CPU power in working mode.
3.
LoRaWAN transmit and receive time consumption. The LoRa TX / RX time and power can be
found in the
In a typical LoRaWAN data transmit. The energy profile is as below:
In LoRaWAN protocol, the device will transfer in different LoRa Radio, and have different energy
profile in LoRa part. We can calculate the battery life in two case:
1)
Lower power LoRa radio. Device has a good signal to gateway
2)
Higher power LoRa radio. Device has a poor signal to gateway
Scenario-A, Lower Power Case
(Good signal quality in
EU868
band)
Radio Parameter: SF7, 125kHz, 14dbm
Transmit interval: 15 minutes.
Payload : 11 Bytes.
