commit 31da56a544df3a4147e983df31909189946a9381
Author: karllzy <806957048@qq.com>
Date:   Fri Dec 9 23:18:11 2022 +0800

    Create the database

diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+# Kergal Flower Control
+
+## Requirements
+1. Monitoring flowers
+    - Using a camera to take photos of flowers
+    - Using AI technology to recognize flowers in the photos
+2. Pump control
+    - Using modbus protocol to control the pump
+3. Soil temperature and humidity monitoring
+    - Using a soil temperature and humidity sensor to monitor soil temperature and humidity
+4. Illumination lamp control
+    - Using an illumination lamp control system to adjust the brightness of the illumination lamp
+5. Recognizing people
+    - Using AI technology to recognize people in the photos
+6. Web viewing
+    - Providing a web page to view monitoring results
+7. API interface
+    - Providing an API interface for easy viewing on mobile apps.
+
diff --git a/config.py b/config.py
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+++ b/config.py
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+# picture directory
+PICTURE_DIRECTORY = "./pictures"
+
+# database location
+DATABASE_LOCATION = "./monitoring.db"
+
+# interval for taking pictures (in seconds)
+PICTURE_INTERVAL = 600  # default 10 minutes
diff --git a/database.py b/database.py
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+++ b/database.py
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+# 一个数据库程序，能够使用devs.py去读取传感器的各项数值以及相应的植物状态图片
+from devs import pump_once, read_status
+import sqlite3
+import time
+
+
+from config import PICTURE_DIRECTORY, DATABASE_LOCATION, PICTURE_INTERVAL
+
+# 创建数据库和图片文件夹
+def create_img_dir():
+    # create a directory for storing pictures
+    if not os.path.exists(PICTURE_DIRECTORY):
+        os.makedirs(PICTURE_DIRECTORY)
+
+
+def create_table():
+    """
+    Create table if not exists
+    """
+    conn = sqlite3.connect(DATABASE_PATH)
+    c = conn.cursor()
+    c.execute("""CREATE TABLE IF NOT EXISTS data (
+        time text,
+        img_path text,
+        temp real,
+        vwc real,
+        ec real,
+        salinity real,
+        tds real,
+        epsilon real
+    )""")
+    conn.commit()
+    conn.close()
+
+
+# 增加数据到数据库
+def insert_data(data: tuple):
+    """
+    Insert data into database
+
+    :param data: tuple, (time, img_path, temp, vwc, ec, salinity, tds, epsilon)
+    """
+    conn = sqlite3.connect(DATABASE_PATH)
+    c = conn.cursor()
+    c.execute("INSERT INTO data VALUES (?, ?, ?, ?, ?, ?, ?, ?)", data)
+    conn.commit()
+    conn.close()
+
+
+def save_img(img):
+    """
+    Save image to directory
+
+    :param img: np.ndarray, image to save
+    """
+    img_path = os.path.join(PICTURE_DIRECTORY, str(time.time()) + ".jpg")
+    cv2.imwrite(img_path, img)
+
+
+# 删除表格中的某一个数据
+def delete_data(time):
+    """
+    Delete data from database
+
+    :param time: str, time of data to delete
+    """
+    conn = sqlite3.connect(DATABASE_PATH)
+    c = conn.cursor()
+    # find the corresponding image path
+    c.execute("SELECT img_path FROM data WHERE time=?", (time,))
+    img_path = c.fetchone()[0]
+    # delete image
+    delete_img(img_path)
+    c.execute("DELETE FROM data WHERE time=?", (time,))
+    conn.commit()
+    conn.close()
+
+
+# 删除相应的图片
+def delete_img(img_path):
+    """
+    Delete image from directory
+
+    :param img_path: str, path of image to delete
+    """
+    os.remove(img_path)
+
+
+# 数据修改
+def update_data(time, data: tuple):
+    """
+    Update data in database, attention, the image cannot be changed!
+
+    :param time: str, time of data to update
+    :param data: tuple, (time, img_path, temp, vwc, ec, salinity, tds, epsilon)
+    """
+    conn = sqlite3.connect(DATABASE_PATH)
+    c = conn.cursor()
+    c.execute("UPDATE data SET time=?, temp=?, vwc=?, ec=?, salinity=?, tds=?, epsilon=? WHERE time=?", (data[0], data[2], data[3], data[4], data[5], data[6], data[7], time))
+    conn.commit()
+    conn.close()
+
+
+# 读取数据库中的数据
+def read_data():
+    """
+    Read data from database
+    """
+    conn = sqlite3.connect(DATABASE_PATH)
+    c = conn.cursor()
+    c.execute("SELECT * FROM data")
+    conn.close()
+    return c.fetchall()
+
+
+def read_recent_data(data_num):
+    """
+    Read recent data from database
+
+    :param data_num: int, number of data to read
+    """
+    conn = sqlite3.connect('data.db')
+    c = conn.cursor()
+    c.execute("SELECT * FROM data ORDER BY time DESC LIMIT ?", (data_num,))
+    print(c.fetchall())
+    conn.close()
+
+
+def main():
+    create_img_dir()
+    create_table()
+    while True:
+        # read sensor data
+        status = read_status()
+        # take a picture
+        img_path = take_picture()
+        # insert data into database
+        data = (time.time(), img_path, status['TEMP'], status['VWC'], status['EC'], status['SALINITY'], status['TDS'], status['EPSILON'])
+        insert_data(data)
+        # pump water
+        pump_once()
+        time.sleep(10)
+
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file
diff --git a/devs.py b/devs.py
new file mode 100644
index 0000000..ca83cbb
--- /dev/null
+++ b/devs.py
@@ -0,0 +1,169 @@
+import serial
+import time
+import logging
+
+def read_reg(dev_addr:int, reg_addr:int, reg_num:int, ser_path:str = '/dev/ttyUSB0'):
+    """
+    Read Reg function (function 3 of modbus).
+    读取寄存器函数, (modbus功能3).
+
+    dev_addr: device address [int] 0 ~ 255
+    reg_addr: reg address [int] 0~2^16
+    reg_num: number of reg [int] 0~2^16
+    ser_path: '/dev/ttyUSB0' [str]
+    """
+    assert (dev_addr < 256) and (dev_addr >= 0)
+    with serial.Serial(ser_path, 9600, timeout=1) as ser:
+        # send the function 3 request
+        # Format: AA 03 RRRR NNNN CCCC
+        # AA: address 0-255
+        # 03: function 3
+        # RRRR: Reg address
+        # NNNN: Reg num
+        # CCCC: CRC correct
+        dev_addr_bytes = dev_addr.to_bytes(1, byteorder='big')
+        reg_addr_bytes = reg_addr.to_bytes(2, byteorder='big')
+        reg_num_bytes = reg_num.to_bytes(2, byteorder='big')
+        cmd = dev_addr_bytes + b'\x03' + reg_addr_bytes + reg_num_bytes
+        crc_code = crc16(cmd)
+        # logging.debug(f'Send cmd {cmd+crc_code}')
+        print("Send CMD: ", end='')
+        print_bytes(cmd+crc_code)
+        ser.write(cmd+crc_code)
+        r = ser.read(1000)
+        print("Read RESPON: ", end='')
+        print_bytes(r)
+        if crc16(r[:-2]) == r[-2:]:
+            return r[3:-2]
+        return False
+
+
+def set_reg(dev_addr:int, reg_addr:int, reg_status:bool, ser_path:str = '/dev/ttyUSB1'):
+    """
+    Set Reg function (function 5 of modbus).
+    设置单个寄存器函数, (modbus功能5).
+
+    dev_addr: device address [int] 0 ~ 255
+    reg_addr: reg address [int] 0~2^16
+    reg_status: true on / false off [bool] 
+    ser_path: '/dev/ttyUSB0' [str]
+    """
+    assert (dev_addr < 256) and (dev_addr >= 0)
+    with serial.Serial(ser_path, 9600, timeout=1) as ser:
+        # send the function 3 request
+        # Format: AA 05 RRRR VVVV CCCC
+        # AA: address 0-255
+        # 05: function 5
+        # RRRR: Reg address
+        # VVVV: Reg value  [on]:FF00H/[off]:0000H
+        # CCCC: CRC correct
+        dev_addr_bytes = dev_addr.to_bytes(1, byteorder='big')
+        reg_addr_bytes = reg_addr.to_bytes(2, byteorder='big')
+        reg_value_bytes = b'\xFF\x00' if reg_status else b'\x00\x00'
+        cmd = dev_addr_bytes + b'\x05' + reg_addr_bytes + reg_value_bytes
+        crc_code = crc16(cmd)
+        print_bytes(cmd+crc_code)
+        ser.write(cmd+crc_code)
+        r = ser.read(1000)
+        print_bytes(r)
+        if r == cmd+crc_code:
+            return True
+        return False
+
+
+def crc16(data: bytes):
+    crc_table = [0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241, 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440, 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40, 0x0A00, 0xCAC1, 0xCB81, 0x0B40,
+                 0xC901, 0x09C0, 0x0880, 0xC841, 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40, 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41, 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
+                 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040, 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240, 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441, 0x3C00, 0xFCC1, 0xFD81, 0x3D40,
+                 0xFF01, 0x3FC0, 0x3E80, 0xFE41, 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840, 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41, 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
+                 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640, 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041, 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240, 0x6600, 0xA6C1, 0xA781, 0x6740,
+                 0xA501, 0x65C0, 0x6480, 0xA441, 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41, 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840, 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
+                 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40, 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640, 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041, 0x5000, 0x90C1, 0x9181, 0x5140,
+                 0x9301, 0x53C0, 0x5280, 0x9241, 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440, 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40, 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
+                 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40, 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41, 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641, 0x8201, 0x42C0, 0x4380, 0x8341,
+                 0x4100, 0x81C1, 0x8081, 0x4040]
+
+    crc_hi = 0xFF
+    crc_lo = 0xFF
+
+    for w in data:
+        index = int(crc_lo) ^ w
+        crc_val = crc_table[int(index)]
+        crc_temp = crc_val >> 8
+        crc_val_low = crc_val - (crc_temp << 8)
+        crc_lo = crc_val_low ^ crc_hi
+        crc_hi = crc_temp
+
+    return bytes([crc_lo, crc_hi])
+
+
+def print_bytes(p_bytes):
+    print(''.join(['\\x%02x' % b for b in p_bytes])) 
+
+
+def parse_potcol(p_bytes: bytes, potcol_type: str='TEMP'):
+    """
+    Parse the potocol
+
+    :param p_bytes: bytes
+    :param potcol_type: str
+    """
+    assert potcol_type in ['TEMP', 'VWC', 'EC', 'SALINITY', 'TDS', 'EPSILON']
+    # Temperature potcol
+    if potcol_type == 'TEMP':
+        assert(len(p_bytes) == 2)
+        a = int.from_bytes(p_bytes, byteorder='big', signed=False)
+        if a > 8000:
+            a = a - 0xFFFF - 1
+        print('Temperature: ', a/100.0, 'C')
+        return a/100.0
+    if potcol_type == 'VWC':
+        assert(len(p_bytes) == 2)
+        a = int.from_bytes(p_bytes, byteorder='big', signed=False)
+        print('Volumn Water Content: ', a/100.0, '%')
+        return a/100.0
+    if potcol_type == 'EC':
+        assert(len(p_bytes) == 2)
+        a = int.from_bytes(p_bytes, byteorder='big', signed=False)
+        print('EC: ', a/100.0, 'us/cm')
+        return a/100.0
+    if potcol_type == 'SALINITY':
+        assert(len(p_bytes) == 2)
+        a = int.from_bytes(p_bytes, byteorder='big', signed=False)
+        print('Salinity: ', a, 'mg/L')
+        return a
+    if potcol_type == 'TDS':
+        assert(len(p_bytes) == 2)
+        a = int.from_bytes(p_bytes, byteorder='big', signed=False)
+        print('TDS: ', a, 'mg/L')
+        return a
+    if potcol_type == 'EPSILON':
+        assert(len(p_bytes) == 2)
+        a = int.from_bytes(p_bytes, byteorder='big', signed=False)
+        print('Epsilon: ', a/100.0, )
+        return a/100.0
+
+
+def pump_once(pump_time: int=2):
+    """
+    进行一次浇花任务， 一次浇花任务包括：
+    1. 打开水泵
+    2. 等待一段时间
+    3. 关闭水泵
+    """
+    r = set_reg(dev_addr=255, reg_addr=1, reg_status=True, ser_path='/dev/ttyUSB1')
+    time.sleep(pump_time)
+    r = set_reg(dev_addr=255, reg_addr=1, reg_status=False, ser_path='/dev/ttyUSB1')
+
+
+def read_status() -> dict:
+    address_type = {0: 'TEMP', 1:'VWC', 2:'EC', 3: 'SALINITY', 4: 'TDS', 5: 'EPSILON'}
+    status = {}
+    for address, value_type in address_type.items():
+        r = read_reg(dev_addr=4, reg_addr=address, reg_num=1, ser_path='/dev/ttyUSB0')
+        status[value_type] = parse_potcol(r, value_type)
+    return status
+
+if __name__ == '__main__':
+    read_status()
+