Per the datasheet:
esp-open-rtos/extras/ads111x/ads111x.c Line 24 see datasheet page 19
#define COMP_QUE_OFFSET should be 0 not 1
esp-open-rtos/extras/ads111x/ads111x.c Lines 54-61 see datasheet page 11 "Read Conversion register:"
in read_reg byte order returned from i2c_slave_read in res is different endianess to uint16_t and needs swapping e.g.
res = ((res & 0xff) << 8) | (res >> 8);
You might update the comment in esp-open-rtos/examples/ads1115_test/main.c to refer to the ADS111x not DS1302 RTC driver
Keep up the good work. Thanks in advance.