Merge pull request #222 from sza2/master
Fix for negative values, Thanks @sza2
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commit
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@ -3,6 +3,7 @@
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-- NODEMCU TEAM
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-- NODEMCU TEAM
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-- LICENCE: http://opensource.org/licenses/MIT
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-- LICENCE: http://opensource.org/licenses/MIT
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-- Vowstar <vowstar@nodemcu.com>
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-- Vowstar <vowstar@nodemcu.com>
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-- 2015/02/14 sza2 <sza2trash@gmail.com> Fix for negative values
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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-- Set module name as parameter of require
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-- Set module name as parameter of require
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@ -96,12 +97,16 @@ function readNumber(addr, unit)
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crc = ow.crc8(string.sub(data,1,8))
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crc = ow.crc8(string.sub(data,1,8))
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-- print("CRC="..crc)
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-- print("CRC="..crc)
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if (crc == data:byte(9)) then
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if (crc == data:byte(9)) then
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t = (data:byte(1) + data:byte(2) * 256)
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if (t > 32767) then
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t = t - 65536
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end
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if(unit == nil or unit == C) then
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if(unit == nil or unit == C) then
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t = (data:byte(1) + data:byte(2) * 256) * 625
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t = t * 625
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elseif(unit == F) then
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elseif(unit == F) then
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t = (data:byte(1) + data:byte(2) * 256) * 1125 + 320000
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t = t * 1125 + 320000
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elseif(unit == K) then
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elseif(unit == K) then
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t = (data:byte(1) + data:byte(2) * 256) * 625 + 2731500
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t = t * 625 + 2731500
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else
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else
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return nil
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return nil
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end
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end
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