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fabrysan

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fabrysan
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  • Finally,I uploaded the sketch "I2C scanner" on the board and I found that ... my PCF8574 answer at address 0x38 ???This probably is a chinese clone... tried another set of chips and they correctly answered at 0x20.So, set the firmware address to 0x4…
    in I2C LCD with PCF8574 hangs the firmware Comment by fabrysan December 2016
  • Looking in the PCF8574 datasheet I red that with the user pin to ground, the 7bit address without R/W bit is 0x20. The write address is 0x40 and the read address 0x41.I presume that the right value is the 7bit value 0x20 and muntiplied by 2 should b…
    in I2C LCD with PCF8574 hangs the firmware Comment by fabrysan March 2016
  • Hi dev,I tried:#define UI_DISPLAY_I2C_ADDRESS 0x4e but the firmware freezes again. Can you explain me what do you mean with "You need to multiplicate the real address by 2" ?From the datasheet of the PCF8574 I can read that the manufacturer address …
    in I2C LCD with PCF8574 hangs the firmware Comment by fabrysan March 2016