plant_pot_esp12

all sensors+rgb.lua

--plant doctor, smart pot system, esp-12 standalone wiring
--
--ds18b20 on GPIO5/pin2
--photocell on GPIO4/pin1
--soil probes on ADC/id=0
--R on GPIO13/pin7 - set low first
--G on GPIO12/pin6 - set low first
--B on GPIO14/pin5 - set low first
--
-- GPIO15 & GND on ESP to GND
-- GPIO0, GPIO2, VCC & CH_PD on ESP to 3.3V @500mA
--
--example lines
--pin = 1
--gpio.mode(pin,gpio.OUTPUT)
--gpio.write(pin,gpio.HIGH)
--gpio.mode(pin,gpio.INPUT)
--print(gpio.read(pin))
--
id = 0
water_value = adc.read(0)
--
light_sensor = 1
light_value = gpio.read(1)
--
red = 7   
green = 6
blue = 5
--
gpio.mode(7,gpio.OUTPUT) 
gpio.mode(6,gpio.OUTPUT) 
gpio.mode(5,gpio.OUTPUT) 
--
gpio.write(7,gpio.LOW) 
gpio.write(6,gpio.LOW) 
gpio.write(5,gpio.LOW)

--ds18b20
pin = 2
ow.setup(pin)

counter=0
lasttemp=-999

function bxor(a,b)
   local r = 0
   for i = 0, 31 do
      if ( a % 2 + b % 2 == 1 ) then
         r = r + 2^i
      end
      a = a / 2
      b = b / 2
   end
   return r
end

--- Get temperature from DS18B20 
function getTemp()
      addr = ow.reset_search(pin)
      repeat
        tmr.wdclr()
      
      if (addr ~= nil) then
        crc = ow.crc8(string.sub(addr,1,7))
        if (crc == addr:byte(8)) then
          if ((addr:byte(1) == 0x10) or (addr:byte(1) == 0x28)) then
                ow.reset(pin)
                ow.select(pin, addr)
                ow.write(pin, 0x44, 1)
                tmr.delay(1000000)
                present = ow.reset(pin)
                ow.select(pin, addr)
                ow.write(pin,0xBE, 1)
                data = nil
                data = string.char(ow.read(pin))
                for i = 1, 8 do
                  data = data .. string.char(ow.read(pin))
                end
                crc = ow.crc8(string.sub(data,1,8))
                if (crc == data:byte(9)) then
                   t = (data:byte(1) + data:byte(2) * 256)
         if (t > 32768) then
                    t = (bxor(t, 0xffff)) + 1
                    t = (-1) * t
                   end
         t = t * 625
                   lasttemp = t
         print("Last temp: " .. lasttemp)
                end                   
                tmr.wdclr()
          end
        end
      end
      addr = ow.search(pin)
      until(addr == nil)
end


getTemp()
t1 = lasttemp
print("Temp:"..t1)
--
print("water:"..water_value)
--
print("light:"..light_value)

--
if light_value > 0 then
print("sun is shining")
else
print("plant sleeping")
end
--
tmr.delay(100000)
--
if water_value < 600 then
gpio.write(5,gpio.HIGH)
print("plant thirsty")
else
print("plant healthy")
gpio.write(6,gpio.HIGH)
end