Legal Removal Request

Post: Looking at the photos your IO Pi boards should still be usable. On the first board if you resolder pad 0 on bus 1 and make sure there is no connection between pad 1 on bus 1 that should give you I2C addresses of 0x20 and 0x21. It looks like you have broken the 5V PCB trace that connects all of the top address pins together so you will need to solder a wire between the top pad 1 on bus 1 and the solder bridge on pad 0 on bus 2. Without this, there will be no 5V supply to the I2C level translator and the board will not appear on the bus. I have marked the image below with a purple line where the wire has to go. On the second board, the 5V trace looks intact so if you leave bus 1 with pad 1 soldered and solder pad 0 on bus 2 that should give you I2C addresses of 0x22 and 0x23. [img]/docs/forumpost/20200210b.webp[/img] You can check if the boards are appearing on the I2C bus by using the command: [pre][code]sudo i2cdetect -y 1[/code][/pre] The i2cdetect command scans the I2C bus and returns a list of addresses that have devices. If you currently only have a high-power soldering iron then it may be worth investing in a smaller iron, or ideally a soldering station with variable temperature control. We use the Metcal SP200 soldering stations which we found on eBay for around £50. They have replaceable tips that come in a wide range of sizes and temperatures and can be used for soldering devices from large connectors down to 0201 surface mount components.