watlow
Python driver and command-line tool for Watlow EZ-Zone temperature controllers.
Installation
uv pip install watlow
Usage
Command Line
$ watlow /dev/ttyUSB0
This returns a simple data structure.
{
"actual": 21.66,
"setpoint": 20.0,
"output": 52.1
}
You can additionally use the --set-setpoint option to set a temperature setpoint.
If interacting with a Watlow RUI Gateway, the zone to get or set should be passed as a flag
$ watlow -z 1 192.168.1.101
See watlow --help for more.
Python
Single Controller
For a single temperature controller, 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()
Gateway
The Gateway driver uses Python async/await syntax to asynchronously communicate with the gateway over ModBus-TCP.
import asyncio
import watlow
async def run():
async with watlow.Gateway('192.168.1.101') as gateway:
print(await gateway.get(1))
asyncio.run(run())
Additionally, there is a mock for the Gateway driver available at watlow.mock.Gateway for testing.
4 maintainers
Metadata
4 maintainers
Release files for watlow 0.9.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| watlow-0.9.0.tar.gz | 17.6 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| watlow-0.9.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 34.5 kB
Release files / watlow-0.9.0.tar.gz
| Download URL | watlow-0.9.0.tar.gz |
|---|---|
| Size | 17.6 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
846c43d73a5d9c91096c052037f3b9730742fc977307f997f70c9d98e78b5d37
|
|
BLAKE2b-256 checksum How to use checksums |
c7510de1308c9792885a32655bf8e067b1a49f51138a8895e8eb44bcd0cd5aa8
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/5.0.0 CPython/3.12.3
|
Release files / watlow-0.9.0-py3-none-any.whl
| Download URL | watlow-0.9.0-py3-none-any.whl |
|---|---|
| Size | 16.9 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
145399cbd8d720b661fc72c8c607d1b702b44e31c1586745867bb2f405b21ecc
|
|
BLAKE2b-256 checksum How to use checksums |
db41c7d74ddd072991174531f661ffde17cf53f6cae24604bd0e0c1bcc12e7c9
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/5.0.0 CPython/3.12.3
|
