porvides
- Minimal 1-wire protocols for USB9097.
- Basic rom search algorithm (use recursion).
has dependencies and limitations
- 100% pure python, requires
pyserial
to control UART.- support external power mode only. parasite power mode is not supported.
- tested on Windows10 PC + USB9097 (1-wire adapter).
- USB9097 (1-wire adater with Vcc supply, PCsensor.com ShenZhen/China)
- DS18B20, DS2438 (Dallas/Maxim)
- Humidity Sensor HIH-5030 + DS2438Z+ (TaaraLabs Estonia)
Check examples/
folder which contains some tests.
pip tpow
will install it under Lib/site-packages/tpow
.
If you can not find examples/
, download source package *.tar.gz
and check it.
Get a ROMID (one 1-wire device on the bus)
import tpow.usb9097 bus = tpow.usb9097.USB9097('COM3') bus.cmd_reset() # 0xE3, 0xC1 bus.dat_write([0x33]) # read-rom ans = bus.dat_read(8) # little-endian (family + SN[6] + CRC) print(['%02X'%ord(a) for a in reversed(ans)]) # big-endian
Get all ROMID's (search all ROM's on the bus)
import tpow.usb9097 bus = tpow.usb9097.USB9097('COM3') xx = tpow.usb9097.search_roms(bus) for x in xx: print(x)
Get temperature / ds18b20
import tpow.usb9097 import tpow.device import tpow.sensor bus = tpow.usb9097.USB9097('COM3') # do temperature conversion and get scratch-pad spad = tpow.device.ds18b20_skip_rom(bus) # decode temperature t = tpow.sensor.ds18b20_temp(spad) print("SPAD : " + " ".join(['%02X' % ord(a) for a in spad])) print("%8.3f [degC]" % t)
- check temperature conversion completed status. (currently, wait 1 sec for each temperature conversion)
- check operation finished status bit.
- check CRC.
- refine data type of parameters (bytes, string, list of single bytes...)
Copyright (c) 2018 Kenich SHIRAKAWA This is licensed under MIT license. See Licence.txt for more information.