Legal Removal Request

Post: Switching off the Raspberry Pi should not cause any damage to the Expander Pi. Can you try running [b]sudo[/b] [b]i2cdetect -y 1[/b] and see if any of the devices on the Expander Pi are listed? The addresses 0x20 for the IO chip and 0x68 for the RTC should appear. Can you also try running some of the demo scripts from our [url=https://github.com/abelectronicsuk/ABElectronics_Python_Libraries/tree/master/ExpanderPi]python library[/url]? demo-adcread.py will read the ADC inputs and show if the SPI bus is communicating. demo-ioread.py will test the IO chip and demo-rtcsetdate.py will try to talk to the RTC. If both the IO and RTC scripts do not work then it is likely to be a software problem which has caused the I2C bus to stop working. If only one of the devices has stopped working then it could a hardware fault in which case I will send you a replacement. It may be worth using a second SD card to set up a fresh image of Raspian Linux and follow our [url=/kb/article/1/i2c-part-2-enabling-i2c-on-the-raspberry-pi]I2C[/url] and [url=/kb/article/2/spi-and-raspbian-linux-on-a-raspberry-pi]SPI[/url] tutorials to enable the buses. With a fresh install, you can download the python library from GitHub and rule out any software problems on your current Linux install.