PMSx003 calculation

[jara1]

Operating environment/Installation (Hass.io/Docker/pip/etc.):

pip
ESP (ESP32/ESP8266/Board/Sonoff):

ESP32
Affected component:

PMSx003

Description of problem:
Hi, I would like to report bug in calculation of PMSx003 total size.
pmsx003.cpp, line 81, should be: uint8_t total_size = 4 + payload_length;

Tested with PMS5003 and works correctly.

Problem-relevant YAML-configuration entries:

PASTE YAML FILE HERE

Traceback (if applicable):

Additional information:

[OttoWinter]

Are you sure that is the actual issue here? There's been a fix recently (in dev, not in 1.9.3) that fixed some of the packet sizes - and for the person reporting the issue that fixed it.

Also line 81 should be correct judging from the datasheet.

Can you try with the latest development version (or beta)?

[jara1]

Hi, I've used version 1.9.3. According to datasheet for PMS5003, frame length (payload length) is 2x13+2 = 28bytes. This matches line 62 in pmsx003.cpp, which is correct. There are another 2bytes for start characters and another 2 bytes for frame length indication = 4bytes. So the total size of the message is 28 + 4 = 32bytes.