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2018-03-29T21:17:11Z

Created page with " * '''Product Web:''' http://seeedstudio.com/depot/grove-temperaturehumidity-sensor-pro-p-838.html?cPath=25_27 * '''Wiki:''' http://seeedstudio.com/wiki/Grove_-_Temperature_..."

New page

* '''Product Web:''' http://seeedstudio.com/depot/grove-temperaturehumidity-sensor-pro-p-838.html?cPath=25_27

* '''Wiki:''' http://seeedstudio.com/wiki/Grove_-_Temperature_and_Humidity_Sensor_Pro

* '''Code Source:''' http://seeedstudio.com/wiki/File:Humidity_Temperature_Sensor.zip

* '''Technical Spec:''' Humidytly: 5% RH - 99% RH - Temperature -40°C - 80°C - Acuracy: 2% RH / 0.5°C

* '''Connector Type:''' Base Shield V1.3 - Grove compatible - http://seeedstudio.com/depot/base-shield-v13-p-1378.html

----
===Temperature & Humidity Sensor Pro===
<br />

[[File:Grove_Tem_Humid.jpg]]

----

=== MyNbios Code - Example ===
<br />

'''In order to run this code you should copy the following code into the area delimited by the MY_NBIOS CUSTOM CODE banners in the Hello_World_xxx.ino example.'''

<pre>
void Nearbus::MyNbios_0( byte portId, UINT setValue, ULONG* pRetValue, byte vmcuMethod, PRT_CNTRL_STRCT* pPortControlStruct )
{
UINT data[6];
UINT _pin;
UINT _count = 6;
ULONG _lastreadtime = 0;
boolean firstreading = true;
float h;
float t;
byte ret;
UINT laststate = HIGH;
UINT counter = 0;
UINT j = 0;
UINT i;
ULONG currenttime;

//************************************
// Reconfiguring Ports as I/O
//************************************
if( pPortControlStruct->portMode != MYDRIVER_MODE )
{
PortModeConfig( portId, MYDRIVER_MODE );
}

//************************************
// Custom Function
//************************************
_pin = pPortControlStruct->pinId;

// pull the pin high and wait 250 milliseconds
digitalWrite(_pin, HIGH);
delay(250);

currenttime = millis();
if (currenttime < _lastreadtime) {
// ie there was a rollover
_lastreadtime = 0;
}
if (!firstreading && ((currenttime - _lastreadtime) < 2000)) {
ret = 0; // return last correct measurement
//delay(2000 - (currenttime - _lastreadtime));
}
else {
firstreading = false;
_lastreadtime = millis();

data[0] = data[1] = data[2] = data[3] = data[4] = 0;

// now pull it low for ~20 milliseconds
pinMode(_pin, OUTPUT);
digitalWrite(_pin, LOW);
delay(20);
cli();
digitalWrite(_pin, HIGH);
delayMicroseconds(40);
pinMode(_pin, INPUT);

// read in timings
for ( i=0; i< 85; i++) { // #define MAXTIMINGS = 85 // how many timing transitions we need to keep track of. 2 * number bits + extra
counter = 0;
while (digitalRead(_pin) == laststate) {
counter++;
delayMicroseconds(1);
if (counter == 255) {
break;
}
}
laststate = digitalRead(_pin);

if (counter == 255) break;

// ignore first 3 transitions
if ((i >= 4) && (i%2 == 0)) {
// shove each bit into the storage bytes
data[j/8] <<= 1;
if (counter > _count)
data[j/8] |= 1;
j++;
}
}
sei();

// check we read 40 bits and that the checksum matches
if ((j >= 40) &&
(data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF)) ) {
ret = 0;
}
else{
ret = 1;
}
}
if (ret == 0) {
h = data[0];
h *= 256;
h += data[1];
h *= 10;

t = data[2] & 0x7F;
t *= 256;
t += data[3];
t *= 10;
if (data[2] & 0x80)
t *= -1;
}
else {
t = 0;
h = 0;
}
// delay(250);

//************************************
// Updating register
//************************************
* pRetValue = (ULONG) t;
}

</pre>

Temperature & Humidity Sensor Pro - Revision history

Nearwiki: Created page with " * '''Product Web:''' http://seeedstudio.com/depot/grove-temperaturehumidity-sensor-pro-p-838.html?cPath=25_27 * '''Wiki:''' http://seeedstudio.com/wiki/Grove_-_Temperature_..."