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Using PySerial is it possble to wait for data? (2)
I've got a python program which is reading data from a serial port via the
PySerial
module. The two conditions I need to keep in mind are: I don't know how much data will arive, and I don't know when to expect data.Based on this I have came up with the follow code snipets:
Hashes for pyserial-3.4-py2.py3-none-any.whl; Algorithm Hash digest; SHA256: e0770fadba6c7e6ef7965954a488d4d7d8: Copy MD5. Listing portsĀ¶. Python-m serial.tools.listports will print a list of available ports. It is also possible to add a regexp as first argument and the list will only include entries that matched.
Python Serial Write Example
So this code will loop forever getting data off the serial port. We'll get up to 500 characters store the data, then alert the main loop by setting a flag. If no data is present we'll just go back to sleep and wait.
The code is working, but I don't like the 5s timeout. I need it because I don't know how much data to expect, but I don't like that it's waking up every 5 seconds even when no data is present. Sim theme park mac download.
Is there any way to check when data becomes available before doing the
read
? I'm thinking something like the select
command in Linux.Python Serial Readline Example
EDIT:
Just thought I'd note that I found the
Just thought I'd note that I found the
inWaiting()
method, but really that seems it just change my 'sleep' to a poll, so that's not what I want here. I just want to sleep until data comes in, then go get it.Ok, I actually got something together that I like for this. Using a combination of
read()
with no timeout and the inWaiting()
method:Python Serial In Waiting Example Free
Horror tiles rpg maker vx ace sprites. This seems to give the results I wanted, I guess this type of functionality doesn't exist as a single method in Python