def ReadUSBData(CSVPath,ClientID,client):
# Read serial data from USB port
#
# Define the PicAxe Divisors
DivisorDict = dict.fromkeys(string.ascii_uppercase)
for key in DivisorDict :
DivisorDict[key] = 1
DivisorDict['A'] = 10 # Soil Moisture
DivisorDict['B'] = 10 # Temperature
DivisorDict['S'] = 10 # Kihi-02 Moisture
DivisorDict['T'] = 10 # Kihi-02 Temperature
USBport = 'USB0'
if (USBport in PiSerial() ):
DoRead = True
logging.info("USB port found: "+ USBport )
else:
Message = "Error looking for "+USBport
CSV_Message = Message
DoRead = ProcessError(CSVPath, ClientID, '', CSV_Message, Message)
# Will try to read (twice) data anyway
SerialDetails = {
"DeviceName": "/dev/tty"+USBport,
"ModuleType": "DRF126x",
"BAUDrate": "2400",
}
# Could also include other parameters
# parity = serial.PARITY_NONE,
# stopbits = serial.STOPBITS_ONE,
# bytesize = serial.EIGHTBITS,
# Default location of serial port on Pi models 3 and Zero
# SERIAL_PORT = "/dev/ttyS0"
# Other serial ports are "/dev/ttyAMA0" & "/dev/serial0"
# ModuleType can be Dorji DRF126x or DRF127x
while DoRead :
try :
Value = GetSerialData(CSVPath,ClientID,SerialDetails)
# logging.info("Serial Loop: %s", Value)
Status = Value["Status"]
if Status == 0 :
Error = "Invalid_Read"
Save2CSV (CSVPath, ClientID, 'Error', Error)
else :
# Status is OK, so write the data ...
Error = Value["Error"]
Channel = Value["Channel"]
Data = Value["Data"]
ClientID = Value["ClientID"]
Save2CSV (CSVPath, ClientID, Channel, Data)
Save2Cayenne (client, Channel, Data, DivisorDict[Channel])
Save2Cayenne (client, 'Stat', Status, 1)
except :
Message = "Exception reading LoRa Data from "+USBport
CSV_Message = Message
DoRead = ProcessError(CSVPath, ClientID, '', CSV_Message, Message)
from MQTTUtils import PiSerial
serialDevices = PiSerial()
print('Onboard port is:'+serialDevices['Onboard'] )
print('USB port(s):',end='')
for Device in serialDevices.keys() :
if 'USB' in Device:
print(Device,end=',')
print()
def GetSerialData(CSVPath,ClientID) :
import struct
import serial
from MQTTUtils import ProcessError
from MQTTUtils import PiSerial
Eq = ' = '
CrLf = '\r\n'
Qt = '"'
# Variables specfic to reading sensor data
DRF126x = False # must be DRF127x
# DRF126x = True
HEADIN = b':'b'0'
# Set up the serial port.
if ('USB0' in PiSerial() ):
SERIAL_PORT = "/dev/ttyUSB0"
else:
SERIAL_PORT = "/dev/serial0"
# SERIAL_PORT = "/dev/ttyAMA0"
# Default location of serial port on Pi models 3 and Zero
# SERIAL_PORT = "/dev/ttyS0"
BAUDRATE=2400
# These values appear to be the defaults
# parity = serial.PARITY_NONE,
# stopbits = serial.STOPBITS_ONE,
# bytesize = serial.EIGHTBITS,
with serial.Serial(SERIAL_PORT, BAUDRATE) as ser:
Sync = ser.read_until(HEADIN)
if not(Sync==HEADIN):
print( "Extra Sync text!", Sync, "**************")
Save2Cayenne (client, 'Stat', 1, 1)
Save2CSV (CSVPath, CayenneParam.get('CayClientID'), 'Sync-Error', Sync)
PacketIn = ser.read(5)
print( PacketIn, len(PacketIn), 'l' )
Device,Channel,Data,Cks=struct.unpack("<ccHB",PacketIn)
if DRF126x :
RSSI = ser.read(1)
else:
RSSI = 0
# Checksum processing
CksTest = 0
for byte in PacketIn[0:5]:
CksTest = CksTest ^ byte
print(Device, Channel, Data, Cks, "RSSI = ", RSSI)
Channel = str(Channel,'ASCII')
SerialData = {
"Device" : Device,
"Channel" : Channel,
"Data" : Data,
"RSSI" : RSSI,
"Status" : 1,
"ClientID" : ClientID,
"Error" : PacketIn,
}
# raise Exception('Test exception at line 96 of SensorLib.py')
if CksTest == 0:
print( 'Checksum correct!')
else:
print( '"Huston - We have a problem!" *******************************' )
SerialData = {
"Status" : 0,
}
DataError(Device , Channel, \
"Checksums (recv/calc): "+str(Cks)+"/"+str(CksTest), PacketIn)
return (SerialData)
LogPathFile = os.path.join(CSVPath, LOG_FILE)
logging.basicConfig(filename=LogPathFile, level=logging.DEBUG)
CurrentTime = datetime.datetime.now().isoformat()
logging.debug(CrLf + '***** Starting at: {a}'.format(a=CurrentTime) + ' *****')
# Cayenne authentication info. This should be obtained from the Cayenne Dashboard,
# and the details should be put into the file listed above.
# Read the Cayenne configuration stuff into a dictionary
ConfigDict = toml.load(ConfPathFile)
CayenneParam = ConfigDict.get('cayenne')
# print (CayenneParam)
# Set up the serial port.
if ('USB0' in PiSerial()):
SERIAL_PORT = "/dev/ttyUSB0"
else:
SERIAL_PORT = "/dev/serial0"
# SERIAL_PORT = "/dev/ttyAMA0"
# Default location of serial port on Pi models 3 and Zero
# SERIAL_PORT = "/dev/ttyS0"
BAUDRATE = 2400
# These values appear to be the defaults
# parity = serial.PARITY_NONE,
# stopbits = serial.STOPBITS_ONE,
# bytesize = serial.EIGHTBITS,