AirQuality < IoT_Course_English

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---+ Exercises on dust sensors
---++ Exercise 1: The Plantower sensor

The Plantower sensor comes with a flat cable with alternating red and black color. I soldered a female Dupont cable to its end. The colors in the table below correspond to the colors of my Dupont cable.

Pin 1 is on the right-hand side of the connector on the sensor.

<img alt="plantowerConnector.png" src="%ATTACHURL%/plantowerConnector.png" title="plantowerConnector.png" />

Connections:
| *PlanTower Pin* | *!WeMos bus* | *color of Dupont cable* |
| 1: Vcc | 5V | green |
| 2: GND | GND | blue |
| 3: set | nc | violet |
| 4: Rx | D2: GPIO 22 | gray |
| 5: Tx | D1_ GPIO 21 | white |
| 6: RESET | RST | black |
| 7: nc | | |
Connect the Plantower sensor to the ESP32 according to the table above. Create a serial connection on !UART 2 with rx on pin 22 and tx on pin 21.

Read messages from the Plantower sensor and print them.
---++ Exercise 2:

Write a function decoding the message.
   * Make sure to find the start characters.
   * Get the frame length and print it.
   * Calculate the checksum and print it together with the checksum in the message. Compare them and make sure they are equal
   * Print the measurement results
-- %USERSIG{UliRaich - 2022-09-09}%

---++ Comments

%COMMENT%

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I	Attachment	History	Action	Size	Date	Who	Comment
png	plantowerConnector.png	r1	manage	1330.7 K	2022-09-10 - 14:35	UliRaich

Topic revision: r2 - 2022-09-10 - UliRaich