IOError: [Errno 121] Remote I/O error

[eat-sleep-code]

I have a new Pi Zero W with the PaPiRus Zero. When I run any of the command line items, I get an error similar to:

File "/usr/local/bin/papirus-clear", line 29 in main() File "/usr/local/bin/papirus-clear", line 23 in main papirus = Papirus() File "/usr/local/lib/python2.7/dist-packages/papirus/epd.py", line 58, in init self._lm75b = LM75B() File "/usr/local/lib/python2.7/dist-packages/papirus/lm75b.py", line 22, in init self._bus.write_byte_data(self._address, LM75B_CONF_REGISTER, LM75B_CONF_NORMAL) IOError: [Errno 121] Remote I/O error

The Pi Zero is running the latest version of Jessie Lite.

[tvoverbeek]

Smells like the Zero W cannot communicate with the lm75b temperature sensor via I2C. Check I2C is enabled with raspi-config. If enabled then use i2cdetect (from the i2c-tools package, install if not there) . 'i2cdetect -y 1' should report a device on address 0x48 (the lm75b). If not check the connections between the Zero W and Papirus Zero.

[shawaj]

@eat-sleep-code did you get this sorted?

[eat-sleep-code]

Yeah, apparently a bad solder job. Switched to solderless hammer headers and it is working.

[shawaj]

@eat-sleep-code you mean that you're now using the hammer header or were before?

Because we've had issues with the hammer headers not getting a good connection previously. We recommend everyone to solder or buy one of our pre soldered Pi Zeros.

In any case, glad you've got it working

[CentralHarlemAnonymous]

I was getting the same error message so, per the advice above, I revisited my solder joints and cleaned up anything that looked suspicious. I also took he opportunity to remove a small splatter of solder on the underside of the board. Victory! Test code is now running without error. The hardware does as it should; when I power the machine down, my test remains on the screen.

[shawaj]

@MichaelSternNYC thanks for the input. What was the solder spatter and what were the dodgy looking connections. Would be interesting to know for our reference and to improve manufacture quality

[CentralHarlemAnonymous]

Not your lousy soldering — mine. I hadn’t done a great job putting headers on my Pi.

Von meinem iPhone gesendet.

On May 11, 2019, at 4:34 PM, Aaron Shaw notifications@github.com wrote:

@MichaelSternNYC thanks for the input. What was the solder spatter and what were the dodgy looking connections. Would be interesting to know for our reference and to improve manufacture quality

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[shawaj]

Aha! Even better news 😁