21) Function: Set modulation mode frequency
Example: AA AF 00 00 03 E8 E0
Indicates that the set frequency is 1KHz;
1000 is converted into hexadecimal as 03 E8; the returned byte is BF F0, which means success.
22) Function: Read modulation mode frequency
Example: Send byte AA CF 00 00 00 00 E0; return byte DF03 E8 F0
03 E8 is converted into a decimal system as 1000; Read the modulation mode
frequency as 1KHz.
23) Function: Set the duty cycle of the modulation mode. Example: AA A8 00 00 00 50
E0 Set the duty cycle to 80%;
80 is converted into hexadecimal as 00 50; the returned byte is B8 F0, indicating
success.
24) Function: Read the duty cycle of modulation mode
Example: Send byte AA C8 00 00 00 00 E0;
Return byte D8 00 50 F0
00 50 is converted to 80 in decimal, which means that the duty cycle is 80%.
25) Function: Read the number of failures
Example: Send byte AA E1 00 00 00 00 E0;
Return byte E1 06 05 04 03 02 01 F0
06 05 04 03 02 01 respectively correspond to the number of ambient temperature
alarms, radiator temperature alarms, pump source temperature alarms, temperature
control alarms, overcurrent alarms, and light-emitting alarms.
26) Function: Set sleep/start mode
Example: Send byte AA E2 00 00 00 01 E0;
AA E2 means frame header and command
