veles_labs/iaq_sensor_wired
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Added baud sweep to find_address.py

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Duke NUCem
2021-10-20 20:04:49 +02:00
parent 8776a84678
commit a5c9eb180d
1 changed files with 20 additions and 18 deletions
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38
tests/find_address.py
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@@ -7,27 +7,29 @@ import serial
print('---- Looking for device ----')
slave_address_list = range(1,256)
baud_list = [4800,115200]
CO2_addr = 9
total_devices = 0
for slave_address in slave_address_list:
print(f'Address {slave_address}:\t', end='')
try:
# modbus init
instrument = minimalmodbus.Instrument('/dev/rs485', slave_address, close_port_after_each_call=True) # port name, slave address (in decimal)
instrument.serial.baudrate = 115200
instrument.serial.bytesize = 8
instrument.serial.parity = serial.PARITY_EVEN
instrument.serial.stopbits = 1
instrument.serial.timeout = 0.05 # seconds
instrument.mode = minimalmodbus.MODE_RTU # rtu or ascii mode
instrument.clear_buffers_before_each_transaction = True
##
CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
print('DEVICE RESPONDED')
total_devices += 1
except minimalmodbus.NoResponseError:
print(f'no response')
sleep(0.1)
for baud in baud_list:
print(f'Address {slave_address} baud {baud}:\t\t', end='')
try:
# modbus init
instrument = minimalmodbus.Instrument('/dev/rs485', slave_address, close_port_after_each_call=True) # port name, slave address (in decimal)
instrument.serial.baudrate = baud
instrument.serial.bytesize = 8
instrument.serial.parity = serial.PARITY_EVEN
instrument.serial.stopbits = 1
instrument.serial.timeout = 0.05 # seconds
instrument.mode = minimalmodbus.MODE_RTU # rtu or ascii mode
instrument.clear_buffers_before_each_transaction = True
##
CO2 = instrument.read_register(CO2_addr, 1, functioncode=4) * 10
print('DEVICE RESPONDED')
total_devices += 1
except minimalmodbus.NoResponseError:
print(f'no response')
sleep(0.1)
print(f'Found {total_devices} devices (tried {len(slave_address_list)} addresses)')
print('---- DONE ----')
exit(0)