Untitled.ipynb

{
 "cells": [
  {
   "cell_type": "code",
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   "metadata": {},
   "outputs": [],
   "source": [
    "def gettemp(id):\n",
    "  try:\n",
    "    mytemp = ''\n",
    "    filename = 'w1_slave'\n",
    "    f = open('/sys/bus/w1/devices/' + id + '/' + filename, 'r')\n",
    "    line = f.readline() # read 1st line\n",
    "    crc = line.rsplit(' ',1)\n",
    "    crc = crc[1].replace('\\n', '')\n",
    "    if crc=='YES':\n",
    "      line = f.readline() # read 2nd line\n",
    "      mytemp = line.rsplit('t=',1)\n",
    "    else:\n",
    "      mytemp = 99999\n",
    "    f.close()\n",
    " \n",
    "    return int(mytemp[1])/float(1000)*(9/5.0)+32\n",
    " \n",
    "  except:\n",
    "    return 99999"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "/usr/local/lib/python3.4/dist-packages/ipykernel_launcher.py:7: RuntimeWarning: This channel is already in use, continuing anyway.  Use GPIO.setwarnings(False) to disable warnings.\n",
      "  import sys\n"
     ]
    }
   ],
   "source": [
    "import RPi.GPIO as gpio\n",
    "import time\n",
    "ID1 = '28-0316647674ff'\n",
    "relay_pin = 8\n",
    "temp_pin = 7\n",
    "gpio.setmode(gpio.BOARD)\n",
    "gpio.setup(relay_pin, gpio.OUT)\n",
    "gpio.setup(temp_pin, gpio.IN)\n",
    "# print(gettemp(ID1))\n",
    "# test = gettemp(ID1)\n",
    "# relay = False\n",
    "# while(test < 80):\n",
    "#     gpio.output(relay_pin,relay)\n",
    "#     test = gettemp(ID1)\n",
    "#     relay = not relay\n",
    "#     time.sleep(1)\n",
    "#     print(test)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
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    }
   ],
   "source": [
    "import pid as control\n",
    "\n",
    "controller = control.PID()\n",
    "controller.set_gains(10,0.0001,1000)\n",
    "setpoint = 75\n",
    "start = time.time()\n",
    "\n",
    "while (time.time()-start < 240): \n",
    "    temp = gettemp(ID1)\n",
    "    if temp == 99999:\n",
    "        gpio.output(relay_pin,0)\n",
    "        continue\n",
    "    err = setpoint-temp\n",
    "    rate = controller.step(err)\n",
    "    print(temp,rate)\n",
    "    rate/=100.0\n",
    "    if ((time.time()-start)%5 < rate*5):\n",
    "        gpio.output(relay_pin,1)\n",
    "    else:\n",
    "        gpio.output(relay_pin,0)\n",
    "    with open('/var/www/html/webdictionary.txt','w') as f:\n",
    "        f.write(str(temp))\n",
    "    \n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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