Featured Product Services
Last Updated on : 2024-05-11 08:11:12download
This topic describes the feature product services. Make sure to review the features before using them.
Smart fan product service
The commands used for the smart fan product.
| Command | Description |
|---|---|
| 0x72 (subcommand: 0x01) | Fan functional test |
| 0x72 (subcommand: 0x02) | Set duty cycle |
Fan functional test
For example, a fan with a step of 20 and a hold-time of five seconds. The module can adjust the motor to 0%, 20%, 40%, 60%, 80%, and 100% in sequence at an interval of five seconds.
The MCU sends the following data.
| Field | Length | Description |
|---|---|---|
| Header | 2 | 0x55aa |
| Version | 1 | 0x03 |
| Command | 1 | 0x72 |
| Data length | 2 | 0x03 |
| Data | 1 | 0x01 (subcommand) |
| 1 | 0x0a: The step of fan speed, ranging from 1 to 99. | |
| 1 | 0x05: The speed level hold-time, ranging from 1 to 100 seconds. | |
| Checksum | 1 | Start from the header, add up all the bytes, and then divide the sum by 256 to get the remainder. |
Example: 55 aa 03 72 00 03 01 0a 05 87
The module returns the following data.
| Field | Bytes | Description |
|---|---|---|
| Header | 2 | 0x55aa |
| Version | 1 | 0x00 |
| Command | 1 | 0x72 |
| Data length | 2 | 0x02 |
| Data | 1 | 0x01 (subcommand) |
| 1 | 0x00: Success. 0x01: Failure. |
|
| Checksum | 1 | Start from the header, add up all the bytes, and then divide the sum by 256 to get the remainder. |
Example: 55 aa 00 72 00 02 01 00 74
Set duty cycle
If the duty cycle is set to 70%, PWM1 outputs 70%, and PWM2 outputs 0%. If zero-crossing is detected, PWM1 outputs 0% and PWM2 outputs 70%.
The MCU sends the following data.
| Field | Length | Description |
|---|---|---|
| Header | 2 | 0x55aa |
| Version | 1 | 0x03 |
| Command | 1 | 0x72 |
| Data length | 2 | 0x02 |
| Data | 1 | 0x02 (subcommand) |
| 1 | 0x0a (0% to 100%) | |
| Checksum | 1 | Start from the header, add up all the bytes, and then divide the sum by 256 to get the remainder. |
Example: 55 aa 03 72 00 02 02 0a 82
The module returns the following data.
| Field | Bytes | Description |
|---|---|---|
| Header | 2 | 0x55aa |
| Version | 1 | 0x00 |
| Command | 1 | 0x72 |
| Data length | 2 | 0x02 |
| Data | 1 | 0x02 (subcommand) |
| 1 |
|
|
| Checksum | 1 | Start from the header, add up all the bytes, and then divide the sum by 256 to get the remainder. |
Example: 55 aa 00 72 00 02 02 00 75
Is this page helpful?
YesFeedbackIs this page helpful?
YesFeedback
