onoff: issue on power failure

i’m using this library on raspy bi 3+ (jessie) and i found that some time library doesn’t work, especially after a power failure.

my workaround at the momnent is lauch this python script before nodejs app and everything goes fine (i have one button only in project)

import RPi.GPIO as GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

hardware

processor : 0 model name : ARMv7 Processor rev 4 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4

processor : 1 model name : ARMv7 Processor rev 4 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4

processor : 2 model name : ARMv7 Processor rev 4 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4

processor : 3 model name : ARMv7 Processor rev 4 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xd03 CPU revision : 4

Hardware : BCM2835 Revision : a020d3

About this issue

Original URL
State: closed
Created 5 years ago
Comments: 21 (11 by maintainers)

Most upvoted comments

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studiosacchetti on May 20, 2019

Just to be sure, the following Node.js program is being used for testing, correct?

const Gpio = require('onoff').Gpio;
const button = new Gpio(4, 'in', 'both');

button.watch((err, value) => {
  console.log('value:' +value) 
});

process.on('SIGINT', () => {
  button.unexport();
});

fivdi on May 13, 2019