先贴代码，demo如下：
i2c.setup(id, sda, scl, i2c.SLOW)
ads1115.reset()
adc1 = ads1115.ads1115(id, ads1115.ADDR_GND)
-- comparator
adc1:setting(ads1115.GAIN_6_144V, ads1115.DR_128SPS, ads1115.SINGLE_1, ads1115.CONTINUOUS, ads1115.COMP_1CONV, 1000, 2000)
local function comparator(level, when)
-- read adc result with read() when threshold reached
gpio.trig(alert_pin)
volt, volt_dec, adc, sign = adc1:read()
print(volt, volt_dec, adc, sign)
end
gpio.mode(alert_pin, gpio.INT)
gpio.trig(alert_pin, "both", comparator)
tmr.alarm(5,100,1,function()
-- read adc result with read()
volt, volt_dec, adc, sign = adc1:read()
print(volt, volt_dec, adc, sing)
end)
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结论一：
local id=0，不是指输入模拟量的id，是i2c的输入必须为0.ADS1115要使用A1或者A2\A3需要配置寄存器地址，demo如下：
adc1 = ads1115.ads1115(0, ads1115.ADDR_GND)
adc1:setting(ads1115.GAIN_6_144V, ads1115.DR_128SPS, ads1115.SINGLE_1, ads1115.CONTINUOUS)
注意，在nodemcu中ads1115.SINGLE_1表示A1口，同理ads1115.SINGLE_0表示A0口，亲测可用。
结论耳：
官网API里的函数实例有大量错误，常见的是把变量adc1写混成ads1，导致编译时报错。
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附图：
参考文章：
Elaine_up的博客
https://blog.csdn.net/Elaine_up/article/details/78052212
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2018.5.18补充关于提示：attempt to call field 'reset' (a nil value)的问题
原因先查一下固件里包含ads1115模块。
还有个原因我是自己编译的固件（不是通过邮箱获取的）会出现这个问题，至今没解决，有大佬解决了还请下方留言指点一二
2018.5.28补充关于ads1117不能同时获取多路数据的问题
dome如下：
tmr.alarm(5,1000,1,function()
-- read adc result with read()
adc1:setting(ads1115.GAIN_6_144V, ads1115.DR_128SPS, ads1115.SINGLE_0, ads1115.CONTINUOUS, ads1115.COMP_1CONV, 1000, 2000)
volt, volt_dec, adc, sign = adc1:read()
print("1:"..volt, volt_dec, adc, sing)
end)
tmr.alarm(4,1000,1,function()
-- read adc result with read()
adc1:setting(ads1115.GAIN_6_144V, ads1115.DR_128SPS, ads1115.SINGLE_1, ads1115.CONTINUOUS, ads1115.COMP_1CONV, 1000, 2000)
volt, volt_dec, adc, sign = adc1:read()
print("2:"..volt, volt_dec, adc, sing)
end)
每个定时器获取一路数据。
