* ADS1115_REG_CONFIG_PGA_6_144V // 2/3x gain +/- 6.144V 1 bit = 0.1875mV (default) * ADS1115_REG_CONFIG_PGA_4_096V // 1x gain +/- 4.096V 1 bit = 0.125mV * ADS1115_REG ...