55 lines
1.8 KiB
Lua
55 lines
1.8 KiB
Lua
local t = require("ds18b20")
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local pin = 3 -- gpio0 = 3, gpio2 = 4
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local function readout(temps)
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if t.sens then
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print("Total number of DS18B20 sensors: ".. #t.sens)
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for i, s in ipairs(t.sens) do
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print(string.format(" sensor #%d address: %s%s", i,
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('%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X'):format(s:byte(1,8)),
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s:byte(9) == 1 and " (parasite)" or ""))
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end
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end
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for addr, temp in pairs(temps) do
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print(string.format("Sensor %s: %s °C", ('%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X'):format(addr:byte(1,8)), temp))
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end
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-- Module can be released when it is no longer needed
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--t = nil
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--package.loaded["ds18b20"]=nil
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end
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do
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t:enable_debug()
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file.remove("ds18b20_save.lc") -- remove saved addresses
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print("=============================================", node.heap())
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print("first call, no addresses in flash, search is performed")
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t:read_temp(readout, pin, t.C)
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tmr.create():alarm(2000, tmr.ALARM_SINGLE, function()
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print("=============================================", node.heap())
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print("second readout, no new search, found addresses are used")
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t:read_temp(readout, pin)
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tmr.create():alarm(2000, tmr.ALARM_SINGLE, function()
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print("=============================================", node.heap())
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print("force search again")
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t:read_temp(readout, pin, nil, true)
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tmr.create():alarm(2000, tmr.ALARM_SINGLE, function()
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print("=============================================", node.heap())
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print("save search results")
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t:read_temp(readout, pin, nil, false, true)
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tmr.create():alarm(2000, tmr.ALARM_SINGLE, function()
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print("=============================================", node.heap())
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print("use saved addresses")
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t.sens={}
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t:read_temp(readout, pin)
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end)
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end)
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end)
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end)
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end
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