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uart_mh-z19's Introduction

uart_mh-z19

shell script for MH-Z19 via uart

Usage

[yourmachine]% uart_mh-z19.sh /dev/ttyUSB0
524

[yourmachine]% uart_mh-z19.sh /dev/ttyUSB0 calzero
0

[yourmachine]% uart_mh-z19.sh /dev/ttyUSB0 calspan2000
0

Software requirement

  • zsh
  • stty
  • sleep
  • xxd
  • timeout
  • dd
  • tr
  • sed
  • bc

Hardware requirement

  • MH-Z19 / MH-Z19B
  • AE-FT234X (FT234X) or similar Serial Interface
  AE-FT234X                  MH-Z19
+------------+             +----------+
|            |             |          |
|         5V *-------------* Vin      |
|            |             |          |
|        GND *-------------* GND      |
|            |             |          |
|         TX *-------------* Rx       |
|            |             |          |
|         RX *-------------* Tx       |
|            |             |          |
+------------+             +----------+

known limitations

  • Ignoring checksum of return value

uart_mh-z19's People

Contributors

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Watchers

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