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  • How to connect a serial LCD to an Arduino UNO

    Ok I got mine figured out. Here's where I got the answer, and this is a great, packed-with-info video:At one point he mentions that there are three jumpers on the back of the I2C backpack (mine are labeled A0, A1, and A2) which are unsoldered. This instructable assumes what is in the video above - that the baseline serial address for the backpack is 0x27.Well I read on the Amazon reviews where I got my serial LCD that I'm supposed to be using 0x3F as the address. The backpack does NOT have anything soldered in the jumpers area so basically whoever made the backpack I have is not following the convention at all. The 0x27 address shows up over and over in tutorials, but is apparently not always the case.I didn't have to do this, but if you don't know the serial address, you can use th...

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    Ok I got mine figured out. Here's where I got the answer, and this is a great, packed-with-info video:At one point he mentions that there are three jumpers on the back of the I2C backpack (mine are labeled A0, A1, and A2) which are unsoldered. This instructable assumes what is in the video above - that the baseline serial address for the backpack is 0x27.Well I read on the Amazon reviews where I got my serial LCD that I'm supposed to be using 0x3F as the address. The backpack does NOT have anything soldered in the jumpers area so basically whoever made the backpack I have is not following the convention at all. The 0x27 address shows up over and over in tutorials, but is apparently not always the case.I didn't have to do this, but if you don't know the serial address, you can use this link to write code to find it for you.http://playground.arduino.cc/Main/I2cScanner

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  • How to connect a serial LCD to an Arduino UNO

    I'm having the same problem... everything connected up and uploading, no compile errors, and a blank screen. :(

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