requestADC(pin); should have 0 as default,

[RobTillaart]

requestADC(0); should have 0 as default, so it is slightly simpler for 1 channel devices,

• ADS1013
• ADS1014
• ADS1113
• ADS1114

Other functions should be checked.

triggered by issue https://github.com/RobTillaart/ADS1X15/issues/39

[RobTillaart]

needs modification

• int16_t readADC(uint8_t pin = 0);
• void requestADC(uint8_t pin = 0);
• readme.md
• version nr.