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	760	+==== **Clear RS485 Command** ====
	761	+
	762	+The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.
	763	+
	764	+
	765	+* **AT Command:**
	766	+
	767	+(% style="color:#037691" %)**AT+CMDEAR=mm,nn** (%%) mm: start position of erase ,nn: stop position of erase Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10
	768	+
	769	+Example screen shot after clear all RS485 commands.
	770	+
	771	+
	772	+The uplink screen shot is:
	773	+
	774	+[[image:1654134704555-320.png]]
	775	+
	776	+
	777	+* **Downlink Payload:**
	778	+
	779	+**0x09 aa bb** same as AT+CMDEAR=aa,bb
	780	+
	781	+
	782	+
760	760	==== **Set Serial Communication Parameters** ====
761	761
762	762	Set the Rs485 serial communication parameters:
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803		-==== ====
	826	+==== **Control output power duration** ====
	827	+
	828	+User can set the output power duration before each sampling.
	829	+
	830	+* **AT Command:**
	831	+
	832	+**Example:**
	833	+
	834	+**AT+3V3T=1000**  ~/~/ 3V3 output power will open 1s before each sampling.
	835	+
	836	+**AT+5VT=1000**  ~/~/ +5V output power will open 1s before each sampling.
	837	+
	838	+
	839	+* **LoRaWAN Downlink Command:**
	840	+
	841	+**07 01 aa bb**  Same as AT+5VT=(aa bb)
	842	+
	843	+**07 02 aa bb**  Same as AT+3V3T=(aa bb)