diff options
Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 15 |
1 files changed, 9 insertions, 6 deletions
@@ -46,12 +46,14 @@ port = softuart.setup(9600, 2, 1) port:on("data", 10, uart_callback) function uart_callback(data) - local pm25i, pm25d, pm10i, pm10d = sds011.parse_frame(data) - if pm25i ~= nil then - -- pm25i/pm10i contain the integer part (i.e., PM2.5 / PM10 value in µg/m³) - -- pm25d/pm10d contain the decimal/fractional part (i.e., PM2.5 / PM10 fraction in .1 µg/m³, range 0 .. 9) - else - -- invalid checksum or non-data frame (i.e., acknowledgment of a write command) + if sds011.parse_frame(data) then + -- PM values or work period have been updated + if sds011.pm2_5i ~= nil then + -- pm2_5i/pm10i contain the integer part (i.e., PM2.5 / PM10 value in µg/m³) + -- pm2_5d/pm10d contain the decimal/fractional part (i.e., PM2.5 / PM10 fraction in .1 µg/m³, range 0 .. 9) + else + -- sds011.work_period has been updated after using sds011.set_work_period + end end end ``` @@ -68,6 +70,7 @@ Currently, the following commands are supported * sleep == true: put sensor into sleep mode. The fan is turned off, no further measurements are performed * sleep == false: wake up sensor. * `port:write(sds011.set_work_period(period))` + * period == nil: request current work period; does not change it * period == 0: continuous operation (about one measurement per second) * 0 < *period* ≤ 30: about one measurement every *period* minutes; fan turned off in-between |