Added new search script find_device.py
This commit is contained in:
mj
parent
e062ab640b
commit
5185544f12
@ -1,35 +0,0 @@
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#!/usr/bin/env python3
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from time import sleep
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from sys import exit
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import minimalmodbus
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import serial
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print('---- Looking for device ----')
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slave_address_list = range(200,256)
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baud_list = [19200,115200]
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CO2_addr = 9
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total_devices = 0
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for slave_address in slave_address_list:
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for baud in baud_list:
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print(f'Address {slave_address} baud {baud}:\t\t', end='')
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try:
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# modbus init
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instrument = minimalmodbus.Instrument('/dev/rs485', slave_address, close_port_after_each_call=True) # port name, slave address (in decimal)
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instrument.serial.baudrate = baud
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instrument.serial.bytesize = 8
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instrument.serial.parity = serial.PARITY_EVEN
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instrument.serial.stopbits = 1
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instrument.serial.timeout = 0.05 # seconds
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instrument.mode = minimalmodbus.MODE_RTU # rtu or ascii mode
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instrument.clear_buffers_before_each_transaction = True
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##
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CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
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print('DEVICE RESPONDED')
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total_devices += 1
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except minimalmodbus.NoResponseError:
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print(f'no response')
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sleep(0.1)
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print(f'Found {total_devices} devices (tried {len(slave_address_list)} addresses)')
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print('---- DONE ----')
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exit(0)
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94
tests/find_device.py
Executable file
94
tests/find_device.py
Executable file
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#!/usr/bin/env python3
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from time import sleep
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from sys import exit, argv
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import minimalmodbus
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import serial
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from sensor import Sensor
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def print_usage():
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print(
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f'''
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USAGE:
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\t{argv[0]} [ -a [{{FIRST_ADDR-LAST_ADDR | ADDR}} ...] ] [ -b [BAUD ...]]
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EXAMPLES:
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Complete search (slow!):
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\t{argv[0]}
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Look for devices 123,10,56 at baudrates 19200,115200:
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\t{argv[0]} -a 123 10 56 -b 19200 115200
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Look for devices 10-55 at baudrate 19200:
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\t{argv[0]} -a 10-55 -b 19200
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Look for device 1-10 and 55 at baudrate 115200:
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\t{argv[0]} -a 1-10 55 -b 115200
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Look for device 1-10 at all possible baudrates:
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\t{argv[0]} -a 1-10 55
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'''
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)
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# Parse arguments. And no, I won't use argparse.
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processing_address = 0
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processing_baud = 0
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addr = []
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baud = []
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for arg in argv[1:]:
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if arg == '-a' or arg == '--address':
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processing_address = 1
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processing_baud = 0
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elif arg == '-b' or arg == '--baudrate':
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processing_address = 0
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processing_baud = 1
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elif processing_address:
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if arg.count('-') == 1:
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# range in form START_ADDR-STOP_ADDR
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start_addr, stop_addr = arg.split('-')
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for a in range(int(start_addr), int(stop_addr) + 1):
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addr.append(a)
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else:
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addr.append(int(arg))
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elif processing_baud:
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baud.append(int(arg))
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elif arg == '-h' or arg == '--help':
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print_usage()
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exit(0)
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else:
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print(f'Unknown argument {arg}')
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print_usage()
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exit(-1)
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# if empty, use all possible values
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if not baud:
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baud = Sensor.baudrates
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if not addr:
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addr = [a for a in range(1,248)]
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addr.reverse() # we usually use high addresses for test devices
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# print
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print('---- Searchspace ----')
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print(f'Addresses: {addr}')
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print(f'Baudrates: {baud}')
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# search for device
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print('---- Looking for device ----')
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total_devices = 0
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tried_devices = 0
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CO2_addr = Sensor.input_register_offset['CO2_addr']
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for a in addr:
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for b in baud:
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print(f'Address {a : >3} baud {b : >6}: ', end='')
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try:
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# modbus init
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instrument = minimalmodbus.Instrument('/dev/rs485', a, close_port_after_each_call=True) # port name, slave address (in decimal)
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instrument.serial.baudrate = b
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instrument.serial.bytesize = 8
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instrument.serial.parity = serial.PARITY_EVEN
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instrument.serial.stopbits = 1
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instrument.serial.timeout = 0.05 # seconds
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instrument.mode = minimalmodbus.MODE_RTU # rtu or ascii mode
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instrument.clear_buffers_before_each_transaction = True
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##
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CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
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print('DEVICE RESPONDED')
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total_devices += 1
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except minimalmodbus.NoResponseError:
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print('no response')
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tried_devices += 1
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sleep(0.1)
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print(f'Found {total_devices} devices (tried {tried_devices})')
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print('---- DONE ----')
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exit(0)
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20
tests/sensor.py
Normal file
20
tests/sensor.py
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class Sensor():
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baudrate_config = [ 19200,4800,9600,14400,19200,28800,38400,57600,76800,115200 ]
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baudrates = [ 4800,9600,14400,19200,28800,38400,57600,76800,115200 ]
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input_register_offset = { \
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'CO2_addr': 9, \
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'T_SHT4x_addr': 10, \
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'RH_SHT4x_addr': 11, \
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'T_SCD4x_addr': 12, \
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'RH_SCD4x_addr': 13, \
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'T_SHT4x_signed_addr': 14, \
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'T_SCD4x_signed_addr': 15 }
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holding_register_offset = { \
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'LED_on_register': 0, \
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'LED_brightness_register': 1, \
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'LED_smooth_register': 2, \
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'CO2_alert_limit_1_register': 3, \
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'CO2_alert_limit_2_register': 4, \
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'SCD4x_temperature_offset_register': 5, \
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'MODBUS_address_register': 6, \
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'baudrate_register': 7 }
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