SenseTemp_Graph.ipynb

{
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  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import time\n",
    "\n",
    "import bqplot as bq\n",
    "import numpy as np\n",
    "import pandas as pd\n",
    "\n",
    "from IPython.display import display"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "def live_plot(title, fields, x=\"\", y=\"\", history=30):\n",
    "    global drop_count\n",
    "    drop_count=0\n",
    "    \n",
    "    x_sc = bq.LinearScale()\n",
    "    y_sc = bq.LinearScale()\n",
    "\n",
    "    ax_x = bq.Axis(label=x, scale=x_sc, grid_lines='solid')\n",
    "    ax_y = bq.Axis(label=y, scale=y_sc, orientation='vertical', grid_lines='solid')\n",
    "\n",
    "    df = pd.DataFrame(columns=['time']+fields)\n",
    "        \n",
    "    pts = bq.Lines(x=df.index, y=[df[f].values for f in fields], display_legend=True, scales={'x': x_sc, 'y': y_sc})\n",
    "    fig = bq.Figure(axes=[ax_x, ax_y], marks=[pts], labels=fields, legend_location='top-left', title=title)\n",
    "    \n",
    "    def cb(data):\n",
    "        global drop_count\n",
    "        \n",
    "        if len(df) > history:\n",
    "            df.drop([drop_count], inplace=True)\n",
    "            drop_count += 1\n",
    "        \n",
    "        df.loc[len(df)+drop_count] = [time.time()] + data\n",
    "        \n",
    "        with pts.hold_sync():\n",
    "            pts.x = df.index \n",
    "            pts.y = [df[f] for f in fields]\n",
    "    \n",
    "    return fig, cb"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
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      "text/plain": [
       "Figure(axes=[Axis(label='Time (sec)', scale=LinearScale()), Axis(label='Temperature (C)', orientation='vertica…"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "ename": "KeyboardInterrupt",
     "evalue": "",
     "output_type": "error",
     "traceback": [
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      "\u001b[0;31mKeyboardInterrupt\u001b[0m                         Traceback (most recent call last)",
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      "\u001b[0;32m<ipython-input-3-7a53acd99dcb>\u001b[0m in \u001b[0;36mpoll\u001b[0;34m()\u001b[0m\n\u001b[1;32m      8\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      9\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mpoll\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 10\u001b[0;31m     \u001b[0mrow\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mdevice\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mreadline\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdecode\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'UTF-8'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m     11\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0mrow\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0;34m\"[\"\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     12\u001b[0m         \u001b[0mcb\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mjson\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mloads\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mrow\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m/usr/local/lib/python3.7/site-packages/pyserial-3.4-py3.7.egg/serial/serialposix.py\u001b[0m in \u001b[0;36mread\u001b[0;34m(self, size)\u001b[0m\n\u001b[1;32m    481\u001b[0m         \u001b[0;32mwhile\u001b[0m \u001b[0mlen\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mread\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;34m<\u001b[0m \u001b[0msize\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    482\u001b[0m             \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 483\u001b[0;31m                 \u001b[0mready\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0m_\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0m_\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mselect\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mselect\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mfd\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mpipe_abort_read_r\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m[\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m[\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtimeout\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mtime_left\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    484\u001b[0m                 \u001b[0;32mif\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mpipe_abort_read_r\u001b[0m \u001b[0;32min\u001b[0m \u001b[0mready\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    485\u001b[0m                     \u001b[0mos\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mread\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mpipe_abort_read_r\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;36m1000\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;31mKeyboardInterrupt\u001b[0m: "
     ]
    }
   ],
   "source": [
    "import serial \n",
    "import json\n",
    "\n",
    "device = serial.Serial(\"/dev/cu.usbmodem1411\", baudrate=115200)\n",
    "\n",
    "fields = [\"CH1\", \"CH2\", \"CH3\", \"CH4\"]\n",
    "fig, cb = live_plot(\"SenseTemp Temperatures\", fields, x=\"Time (sec)\", y=\"Temperature (C)\")\n",
    "\n",
    "def poll():\n",
    "    row = device.readline().decode('UTF-8')\n",
    "    if row[0] == \"[\":\n",
    "        cb(json.loads(row))\n",
    "\n",
    "display(fig)\n",
    "\n",
    "while True:\n",
    "    poll()"
   ]
  }
 ],
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