Legal Removal Request

Post: That worked! Your test.c program compiled and seems to run okay. However, it failed [pre][code]IOPi_init(0x20)[/code][/pre] and other address number attempts with [pre][code]Failed to write to i2c device for write[/code][/pre] so I'm now wondering if I've fouled up the hardware during soldering..([i]I shouldn't have used an old high-powered soldering gun from the discrete component days.[/i]) The IO Pi Plus 2.1 cards get 5 volts okay, externally supplied (jumper un-soldered).. On one card, the address is set to 0x20; that is, solder pads 0/1/2 are not soldered together for either bus 1 or bus 2. ([b][i]One thing that I see wrong is that bus 2 pads 0 should be soldered together, right?[/i][/b]) Due to poor soldering technique on my part, I've fried a couple of the address solder pads, then tried to remove the solder on the remaining ones, and may have fried something in the process. On my second card, I managed to destroy only one of the solder pads, and have connected the "1" pads to set it up for address 22. Looks like I can solder Bus 2 pads 0 together again, so maybe this card can be salvaged too. [img]/docs/forumpost/20200210.webp[/img] So, what are your thoughts? Have I destroyed the cards and will have to buy two more? Will soldering pads 0 together on both cards' bus 2 fix my problem? ([i]...just tried it. Nope- - no joy[/i].) ...any other thoughts?