OpenSmart

seems not to work... 2022-05-23 06:47:29

same problem here: Formula in datasheet doesn't work. Suggested code here gives strange values as well. Is there a schematics available for this module? And what is the trimmer good for? And what about the digital pin? No description in the datasheet.

Question about it's LEDs 2019-08-30 03:23:10

I'm currently testing this sensor and wondering about it's 2 LEDs: L1 seems to be power on/off, but what does L2 mean? It's switching from off to on/dimmed to on in some situations. Thanks in advance Guys

Temperature Sensor 2019-02-21 00:13:32

This might work:

#define SERIESRESISTOR 40000
#define NOMINAL_RESISTANCE 10000
#define NOMINAL_TEMPERATURE 25
#define BCOEFFICIENT 3950
float ADCvalue;
float Resistance;
ADCvalue = analogRead(sensorPin);
//convert value to resistance
Resistance = (1023 / ADCvalue) - 1;
Resistance = SERIESRESISTOR / Resistance;
float steinhart;
steinhart = Resistance / NOMINAL_RESISTANCE; // (R/Ro)
steinhart = log(steinhart); // ln(R/Ro)
steinhart += 1.0 / (NOMINAL_TEMPERATURE + 273.15); // + (1/To)
steinhart = 1.0 / steinhart; // Invert
steinhart -= 273.15; // convert to C
temperature = steinhart;

test 2019-02-21 00:12:04

1 2 4\n 5
6 7

Temperature Sensor 2019-02-21 00:09:13

This might work: #define SERIESRESISTOR 40000 #define NOMINAL_RESISTANCE 10000 #define NOMINAL_TEMPERATURE 25 #define BCOEFFICIENT 3950 float ADCvalue; float Resistance; ADCvalue = analogRead(sensorPin); //convert value to resistance Resistance = (1023 / ADCvalue) - 1; Resistance = SERIESRESISTOR / Resistance; float steinhart; steinhart = Resistance / NOMINAL_RESISTANCE; // (R/Ro) steinhart = log(steinhart); // ln(R/Ro) steinhart /= BCOEFFICIENT; // 1/B * ln(R/Ro) steinhart += 1.0 / (NOMINAL_TEMPERATURE + 273.15); // + (1/To) steinhart = 1.0 / steinhart; // Invert steinhart -= 273.15; // convert to C temperature = steinhart;

Digital Temperature Sensor 2017-10-20 14:38:07

I have tested the Sensor with exactly the code above. But to me it seems that the Thermistor is not a NTC. When i heat it up, the temperature goes down. So can anyone help me to get this sensor running? Thank's

Digital Temperature Sensor