OP下三个设备的LUA的测试例程, 自测成功

原装电源（５Ｖ１Ａ）,  品胜的USB HUB,  接了三个设备(CH340+DHT22,  DS9490+DS18B20,  CP2102+sharp2)

--[[
(温湿度+sharp2+此处省略N...) LUA测试例程, 如下地址可以查看
http://www.lewei50.com/u/g/2375
]]--

print("--> Hello LUA, qiushui_007 test!")
-- load library
local xucommon = require "luaxucommon"
local uart = require "luauart"
local http = require("socket.http")
local ltn12 = require "ltn12"

str_ip = xucommon.get_local_ip("auto")

to_id = "[e-mail]"
function mail_tx(to_id, subject, content)
    xucommon.mail_tx(to_id, subject, content)
end

function delay_ms(delay1)
    xucommon.delay_ms(delay1)
end


function hex(s)        --显示字符串的HEX码
    local s1 = string.gsub(s, "(.)", function (x) return string.format("%02X ", string.byte(x)) end)
    return s1
end

---
function http_lewei50_request(reqbody)
    local gateid = "01"
    local userkey = "36be8ff22f794f1e8a0bee3336eexxxx"

  --local reqbody = "[{\"Name\":\"" .. deviceid .. "\", \"Value\":\"" .. tostring(data) .. "\"}]"
  local respbody = {}
  local body, code, headers, status = http.request {
      method = "POST",
      url = "" .. gateid,
      source = ltn12.source.string(reqbody),
      headers = {
        ["userkey"] = userkey,
        --["Content-Type"] = "application/x-www-form-urlencoded",
        ["content-length"] = string.len(reqbody),
        ["Connection"] = "Close"
      },
      sink = ltn12.sink.table(respbody)
  }

  print("lewei50: " .. "reqbody = " .. reqbody)
  print('body:' .. tostring(body))
  print('code:' .. tostring(code))
  print('status:' .. tostring(status) .. "\n")
end

function http_lewei50(deviceid, data)
  local reqbody = "[{\"Name\":\"" .. deviceid .. "\", \"Value\":\"" .. tostring(data) .. "\"}]"
  http_lewei50_request(reqbody)
end

function http_lewei50_2(deviceid, data, deviceid1, data1)
  local reqbody = "[{\"Name\":\"" .. deviceid .. "\", \"Value\":\"" .. tostring(data) .. "\"}, {\"Name\":\"" .. deviceid1 .. "\", \"Value\":\"" .. tostring(data1) .. "\"}]"
  http_lewei50_request(reqbody)
end

--- 读取BH4TDV之温湿度 start -------------------------------------------------------------------------
function bh4tdv_get()
    --device_name = "/dev/ttyATH0"
    local device_name = "/dev/ttyUSB0"

    local portnum = uart.open(device_name)
    --print(portnum)

    -- 先赋特定值
    f_h1 = 0.0
    f_t1 = 0.0

    if portnum >= 0 then
        uart.buad_set(portnum, 0)
        uart.flush(portnum)
        --wifi温湿度, 必须>=200
        timeout_ms = 200
        uart.timeout(timeout_ms)

        --wifi温湿度, 读取湿度和温度
        str1 = string.char(0x01, 0x03, 0x90, 0x01, 0x00, 0x02, 0xb8, 0xcb)
        len = string.len(str1)
        print("tx(" .. len .. "): " .. hex(str1))
        len_ret, str_ret = uart.tx_rx(portnum, str1, len)
        if len_ret == 9 then
            print("rx(" .. len_ret .. "): " .. hex(str_ret))
            --01 03 04 01 DD 00 F9 AB B7
            --- 判断CRC16
            --str_tmp = string.char(0x31, 0x32, 0x33, 0x34, 0x35, 0x36)
            crc16 = xucommon.get_crc16(str_ret)
            print("crc16 = " .. tostring(crc16) .. ", 0x" .. string.format("%04X", crc16))

            h1_h = string.byte(str_ret, 4)
            h1_l = string.byte(str_ret, 5)
            f_h1 = (h1_h * 256 + h1_l) / 10

            t1_h = string.byte(str_ret, 6)
            t1_l = string.byte(str_ret, 7)
            f_t1 = (t1_h * 256 + t1_l) / 10
            print("h1 = " .. tostring(f_h1) .. ", t1 = " .. tostring(f_t1) )

        end

        --最后一定要close
        uart.close(portnum)
    end

    return f_h1, f_t1
end

f_h1, f_t1 = bh4tdv_get()
http_lewei50_2("T1", f_t1, "H1", f_h1)

--- 温度的最小和最大值
t_min = 10.0
t_max = 35.0
if f_t1 < t_min or f_t1 > t_max then
  local str_time = os.date("%Y") .. "-" .. os.date("%m") .. "-" .. os.date("%d") .. " " .. os.date("%X")
    local content = str_time .. ", " .. str_ip .. ", " .. tostring(f_t1) .. "\n"
    subject = "BH4DTV read error"
    mail_tx(to_id, subject, content)
end
--- 读取BH4TDV之温湿度 end -------------------------------------------------------------------------

--- 同一网关不能更新太快, 否则可能封IP
delay_ms(1000)

--- 读取DS18B20的温度 start -------------------------------------------------------------------------
function ds18b20_get()
    local owlua = require "owlua"

    f_t2 = 0.0
    local device_name = "USB"
    local portnum = owlua.open(device_name)
    if portnum > 0 then
        f_t2 = owlua.ds18b20_get_one(portnum)
        print("T2 = " .. tostring(f_t2))
        owlua.close(portnum)
    end

    return f_t2
end

f_t2 = ds18b20_get()
http_lewei50("T2", f_t2)

--- 差值大于特定范围则报告
f_mark = 2.0
--f_t2 = f_t1 - f_mark - 0.1 --only test
f_diff = f_t1 - f_t2
if f_diff < -f_mark or f_diff > f_mark then
    local str_time = os.date("%Y") .. "-" .. os.date("%m") .. "-" .. os.date("%d") .. " " .. os.date("%X")
    local content = str_time .. ", " .. str_ip .. ", BH4TDV: " .. tostring(f_t1) .. ", 18B20: " .. tostring(f_t2)
    print(content)
    subject = "BH4DTV diff bigger than mark"
    mail_tx(to_id, subject, content)
end
--- 读取DS18B20的温度 End -------------------------------------------------------------------------

delay_ms(1000)

--- read sharp2 start ------------------------------------------------------------------------
function sharp2_get()
    local device_name = "/dev/ttyUSB1"

    f_vo, pc_ret = uart.sharp2_get(device_name)
    if f_vo > 0.0 then
        if f_vo <= 3 then
                k = 200
        end
        f_data = f_vo * k
    else
        f_data = 0.0
    end

    str_data = "PM2.5 = " .. tostring(f_data) .. ", str = " .. pc_ret .. ", vo = " .. tostring(f_vo)
    print(str_data)

    return f_data, str_data
end

f_u1, str_u1 = sharp2_get()

t_min = 0.0
t_max = 560.0
--f_u1 = 0.0    -- only
if f_u1 > t_min and f_u1 < t_max then
    http_lewei50("U1", f_u1)

else
    local str_time = os.date("%Y") .. "-" .. os.date("%m") .. "-" .. os.date("%d") .. " " .. os.date("%X")
    local content = str_time .. ", " .. str_ip .. ", " .. str_u1
    print(content)
    subject = "sharp2 data error"
    mail_tx(to_id, subject, content)

end
--- read sharp2 end ------------------------------------------------------------------------