Data Sheet

39
--acquisition loop
for j = 1, 40, 1 do
while (gpio_read(pin)==1 and bitlength<10 ) do
bitlength=bitlength+1
end
bitStream[j]=bitlength
bitlength=0
--bus will always let up eventually, don't bother with timeout
while (gpio_read(pin)==0) do end
end
--DHT data acquired, process.
for i = 1, 8, 1 do
if (bitStream[i+0] > 2) then
Humidity = Humidity+2^(8-i)
end
end
for i = 1, 8, 1 do
if (bitStream[i+8] > 2) then
HumidityDec = HumidityDec+2^(8-i)
end
end
for i = 1, 8, 1 do
if (bitStream[i+16] > 2) then
Temperature = Temperature+2^(8-i)
end
end
for i = 1, 8, 1 do
if (bitStream[i+24] > 2) then
TemperatureDec = TemperatureDec+2^(8-i)
end
end
for i = 1, 8, 1 do
if (bitStream[i+32] > 2) then
Checksum = Checksum+2^(8-i)
end
end
ChecksumTest=(Humidity+HumidityDec+Temperature+TemperatureDec) % 0xFF
print ("Temperature: "..Temperature.."."..TemperatureDec)
print ("Humidity: "..Humidity.."."..HumidityDec)
print ("ChecksumReceived: "..Checksum)