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piSRF - better handle timeouts, closing

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This commit is contained in:
Dave Conway-Jones 2018-11-28 09:18:18 +00:00
parent b34338357f
commit b75f12aced
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GPG Key ID: 9E7F9C73F5168CD4
2 changed files with 9 additions and 4 deletions
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11
hardware/PiSrf/nrsrf.py
View File

@ -8,6 +8,11 @@ import RPi.GPIO as GPIO
import time import time
import sys import sys
import os, select import os, select
import signal
def signal_handler(sig, frame):
sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)
# Turn off warnings if you run it a second time... # Turn off warnings if you run it a second time...
GPIO.setwarnings(False) GPIO.setwarnings(False)
@ -23,11 +28,13 @@ def Measure():
GPIO.output(TRIGGER, True) GPIO.output(TRIGGER, True)
time.sleep(0.00001) time.sleep(0.00001)
GPIO.output(TRIGGER, False) GPIO.output(TRIGGER, False)
start = time.time()
stop = time.time()
while GPIO.input(ECHO)==0: while GPIO.input(ECHO)==0:
start = time.time() start = time.time()
Dif = time.time() - realstart Dif = time.time() - realstart
if Dif > 0.2: if Dif > 0.2:
print("Ultrasonic Sensor Timed out, Restart.") # print("Ultrasonic Sensor Timed out, Restart.")
time.sleep(0.4) time.sleep(0.4)
return 400 return 400
while GPIO.input(ECHO)==1: while GPIO.input(ECHO)==1:
@ -74,8 +81,6 @@ if len(sys.argv) > 1:
time.sleep(SLEEP) time.sleep(SLEEP)
except: # try to clean up on exit except: # try to clean up on exit
print("0.0") print("0.0")
GPIO.cleanup()
sys.exit(0)
else: else:
print("Bad params") print("Bad params")

2
hardware/PiSrf/package.json
View File

@ -1,6 +1,6 @@
{ {
"name" : "node-red-node-pisrf", "name" : "node-red-node-pisrf",
"version" : "0.1.3", "version" : "0.1.4",
"description" : "A Node-RED node for a Raspberry Pi to use a SRF04 or SRF05 range finder", "description" : "A Node-RED node for a Raspberry Pi to use a SRF04 or SRF05 range finder",
"dependencies" : { "dependencies" : {
}, },