IOError: [Errno 121] Remote I/O error

[DarKOrange75]

Hi,

I can't get it to work, I am running it it with a raspberry A+ and as soon as I test it with a piezo I get this error:

Traceback (most recent call last):
File "demo.py", line 23, in handle_interrupt
reason = sensor.get_interrupt()
File "/home/pi/RaspberryPi-AS3935/RPi_AS3935/RPi_AS3935.py", line 48, in get_interrupt
self.read_data()
File "/home/pi/RaspberryPi-AS3935/RPi_AS3935/RPi_AS3935.py", line 234, in read_data
self.registers = self.i2cbus.read_i2c_block_data(self.address, 0x00)
IOError: [Errno 121] Remote I/O error

Thank you for your help !

[pcfens]

Did you remember to enable the I2C device driver?

You may also need to set the I2C bus to 1.

[DarKOrange75]

Thank you for your answer, I2C bus was set to 1, the AS3935 is detected with i2cdetect -y 1 in position 3
What do you mean by enable the I2C device driver?

 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

00: 03 -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- 36 -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

[pcfens]

By driver I mean the kernel module - that i2cdetect works makes me think it's working as expected.

Can you try running the python script as root (or using sudo)? I doubt that's it, but it'd be good to confirm.

[pawelKapl]

Same here, i2c is detecting module as 03 on bus 1. And getting very same error, with sudo too. Running on Raspberry Pi 2b.

[DarKOrange75]

Same error when running the script with sudo.

[zanzeoo]

same

File "demo.py", line 17, in
sensor.calibrate(tun_cap=0x0F)
File "/home/pi/RaspberryPi-AS3935/RPi_AS3935/RPi_AS3935.py", line 24, in calibrate
self.set_byte(0x08, (self.registers[0x08] & 0xF0) | tun_cap)
File "/home/pi/RaspberryPi-AS3935/RPi_AS3935/RPi_AS3935.py", line 222, in set_byte
self.i2cbus.write_byte_data(self.address, register, value)
IOError: [Errno 121] Remote I/O error

[pawelKapl]

Hey guys i noticed something interesting. Sensor is actually starting working when GND of Raspberry or sensor ground is connected to earth, or u just touch it with a finger. This might explain why for example sensor can work with LAN cable, but not on wifi.