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15 lines
583 B
Markdown
15 lines
583 B
Markdown
# MH-Z19/MH-Z19B Driver Test
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## Introduction
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This test will test if the MH-Z19 C02 gas sensor is working. The MH-Z19B seems
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to be newer design which also works with this driver.
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## Configuration
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When testing the UART mode, set `TEST_MODE` to 1. To test the PWM mode, set
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`TEST_MODE` to 2. In UART mode, make sure that `TEST_UART` points to the
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interface to use. In PWM mode, make sure to define `TEST_PWM`.
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## Expected result
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The sensor should continuously (every 1 sec) output the CO2 ppm level. When the
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sensor is disconnected, it should display a failure message every second.
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