watlow
Python driver and command-line tool for Watlow EZ-Zone temperature controllers.
Installation
pip install watlow
Usage
Command Line
$ watlow /dev/ttyUSB0
This returns a simple data structure.
{
"actual": 21.66,
"setpoint": 20.0
}
You can additionally use the --set-setpoint option to set a temperature setpoint.
See watlow --help for more.
Python
The python interface is basic synchronous serial communication.
import watlow
tc = watlow.TemperatureController('/dev/ttyUSB0')
tc.set(30)
print(tc.get())
The driver is designed to be fault tolerant over long polling, and should
appropriately reconnect if its IOErrors are managed. Here's an implementation
with standard long-poll exception handling. This should run until interrupted and
then exit cleanly.
from time import sleep
import watlow
tc = watlow.TemperatureController('/dev/ttyUSB0')
try:
while True:
try:
print(tc.get())
except IOError:
print('disconnected')
sleep(1)
except KeyboardInterrupt:
pass
finally:
tc.close()
4 maintainers
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