Support for ZH03B sensor - Laser Dust Module

[Bjk8kds]

Describe the component you'd like

Can Esphome make support for ZH03B sensor?
It's a great alternative to the PMS5003, etc.
I see there's already custom code here, but I'm wondering why it hasn't been implemented into Esphome?

What are your use cases for this component?

A great alternative to dust sensor (PM2.5) besides PMS5003, etc.

Is there a public datasheet, documentation and/or schematics?

Winsen PDF

Anything else?

#1557

[Bjk8kds]

After checking, I found the code above was using the wrong byte order, using the byte order for "continuous" or "initiative mode," even though the code actually suggested using "Q&A mode."

• Q&A mode byte order ✅

• Initiative mode byte order ❌

Here's the corrected code using the "Q&A mode": I also changed it to use Bitwise

uart:
  - id: uart_zh03b
    rx_pin: GPIO1
    tx_pin: GPIO3
    baud_rate: 9600
    debug:
      direction: RX
      dummy_receiver: true
      sequence:
        - lambda: |-
            UARTDebug::log_hex(direction, bytes,':');  //Log hex data
            if (bytes.size() == 9 && bytes[0] == 0xFF && bytes[1] == 0x86) {
              //only update if expected response bytes returned //update using Bitwise style
              id(zh03b_pm1).publish_state((bytes[6] << 8) | bytes[7]);
              id(zh03b_pm2_5).publish_state((bytes[2] << 8) | bytes[3]);
              id(zh03b_pm10).publish_state((bytes[4] << 8) | bytes[5]);
            }

[Bjk8kds]

Alright! I have made my own custom component.
https://github.com/Bjk8kds/esphome-zh03b-sensor

Examples of yaml can be seen here.
Including if you want to directly create lambda function in yaml, without the custom component.
https://github.com/Bjk8kds/esphome-zh03b-sensor/tree/main/example