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LHT65 Temperature & Humidity sensor      34  /  56 
3.2 Set External Sensor Mode 
Feature: Change External Sensor Mode. 
AT Command: AT+EXT 
Get current external sensor mode 
1 
OK 
External Sensor mode =1   
Set external sensor mode to 1 
Set to use Interrupt Mode. 
Sent uplink packet in both rising and falling interrupt 
Set to use Interrupt Mode. 
Sent uplink packet only in falling interrupt 
Set to use Interrupt Mode. 
Sent uplink packet only in rising interrupt 
Set to use illumination sensor 
Set to use ADC sensor mode and LHT65 will power the external ADC 
sensor for 1000ms before sampling the ADC value 
Timeout range can be : 0 ~ 65535 
Set to counting mode and count at falling interrupt 
Set to counting mode and count at rising interrupt 
Set to 4 bytes counting mode and count at falling interrupt 
Set to 4 bytes counting mode and count at rising interrupt 
Set to external DS18B20 with timestamp 
 
Downlink Command: 0xA2 
Total bytes: 2 ~ 5 bytes 
Example:   
  0xA201: Set external sensor type to E1 
  0xA20401: Same as AT+EXT=4,1 
  0xA20603E8, Same as AT+EXT=6,1000 
  0xA2080100, Same as AT+EXT=8,0 
  0xA2080101, Same as AT+EXT=8,1 
  0xA20702003c,Same as AT+SETCNT=60