Legal Removal Request

Post: Hi John Can you try measuring the voltage between the 5V and GND pins on the Expander Pi to check that it is getting voltage from the Raspberry Pi? You could also try downloading our [url=https://github.com/abelectronicsuk/ABElectronics_Python_Libraries/tree/master/ExpanderPi]Expander Pi python library[/url] and running the ADC or DAC demos to check if the SPI bus works. You should see two devices listed on i2cdetect with or without a battery fitted to the Expander Pi. As you do not see any devices, that would suggest a problem either with the configuration of the I2C bus on the Raspberry Pi or a hardware problem on the Expander Pi. Can you review the steps in our [url=/kb/article/1/i2c-part-2-enabling-i2c-on-the-raspberry-pi[/url] again to ensure everything is configured correctly on the Raspberry Pi? If that does not help, try reflowing the solder on the GPIO pins, focusing on pins 1 to 6 next to the JUMPER label on the PCB. It could be a dry joint or a solder bridge between the I2C GPIO pins stopping it from working.