Created
July 7, 2014 18:48
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Basic "Thermostat" Example with imp001 with thermistor and LED
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| // agent code: | |
| target <- 30.0; | |
| current <- "Unkown"; | |
| device.send("target", target); | |
| device.on("current", function(t){ current <- format("%0.1f C",t)}); | |
| http.onrequest(function(request,res){ | |
| if(request.method == "POST"){ | |
| local post = http.urldecode(request.body); | |
| if("target" in post){ | |
| target = post.target.tofloat(); | |
| device.send("target", target); | |
| } | |
| } | |
| local html = "<html><body><form method='post'>Current Temperature: "+current+"<input type='submit' value='Refresh'><br><form method='post'>Set Temperature: <input name='target' type='number' min='20' max='40' step='0.5' value='"+target+"'><input type='submit'></form></body></html>"; | |
| res.send(200,html); | |
| }); |
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| temp_enable <- hardware.pin2; | |
| temp_enable.configure(DIGITAL_OUT); | |
| temp_enable.write(1); | |
| temp_pin <- hardware.pin5; | |
| temp_pin.configure(ANALOG_IN); | |
| led <- hardware.pin1; | |
| led.configure(DIGITAL_OUT); | |
| target <- 30; | |
| agent.on("target", function(t){target = t}); | |
| function read_temperature() { | |
| local vdda = hardware.voltage(); | |
| local v_therm = temp_pin.read() * (vdda / 65535.0); | |
| return (298.15 * 3380.0) / | |
| (3380.0 - 298.15 * math.log(10000.0 / ((vdda - v_therm) * | |
| (10000.0 / v_therm)))) - 273.15; | |
| } | |
| function loop(){ | |
| local t = read_temperature(); | |
| agent.send("current",t); | |
| if(t < target){ | |
| led.write(1); | |
| }else{ | |
| led.write(0); | |
| } | |
| imp.wakeup(1, loop); | |
| } | |
| loop(); |
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