ds18b20-example.lua 1.1 KB

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  1. -- encoder module is needed only for debug output; lines can be removed if no
  2. -- debug output is needed and/or encoder module is missing
  3. t = require("ds18b20")
  4. pin = 3 -- gpio0 = 3, gpio2 = 4
  5. function readout(temp)
  6. for addr, temp in pairs(temp) do
  7. -- print(string.format("Sensor %s: %s 'C", addr, temp))
  8. print(string.format("Sensor %s: %s °C", encoder.toHex(addr), temp)) -- readable address with base64 encoding is preferred when encoder module is available
  9. end
  10. -- Module can be released when it is no longer needed
  11. t = nil
  12. package.loaded["ds18b20"]=nil
  13. end
  14. -- t:readTemp(readout) -- default pin value is 3
  15. t:readTemp(readout, pin)
  16. if t.sens then
  17. print("Total number of DS18B20 sensors: "..table.getn(t.sens))
  18. for i, s in ipairs(t.sens) do
  19. -- print(string.format(" sensor #%d address: %s%s", i, s.addr, s.parasite == 1 and " (parasite)" or ""))
  20. print(string.format(" sensor #%d address: %s%s", i, encoder.toHex(s.addr), s.parasite == 1 and " (parasite)" or "")) -- readable address with base64 encoding is preferred when encoder module is available
  21. end
  22. end